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DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI
PART A: HVAC CONTENTS 1.
GENERAL : PROJECT DESCRIPTION
A.
2. MECHANICAL SYSTEM DESCRIPTION : DESIGN OBJECTIVES
B.
GENERAL REQUIREMENTS
C.
DESIGN CRITERIA
D.
COOLING LOAD DESIGN PARAMETERS
E.
MAIN PLANT DESCRIPTION
F.
FACILITY FLOORS
G.
MECHANICAL VENTILATION SYSTEM 3. REFERENCE STANDARDS AND DOCUMENTS 4. ANNEXURES
1
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI GENERAL A. t Description
Projec
1. Project is a deluxe hotel located at prime upcoming location in city of Varanasi. The building is designed by renowned Architect M/s. Identity Architects & Interior Designers. 2. tower building.
The building consists of basement, ground + seven hotel
3. The services are distributed over basement, service floor and service areas on guest floors. The mechanical ventilation fans for various service areas are being planned in respective areas. The air handling units for public areas are being planned in respective area with separate mechanical rooms, guest floor common areas shall be catered through dedicated air handling unit envisaged to be in service areas of guest floor. Individual Guest Room shall be catered through the fan coil unit provided in the respective room. 4. The mechanical and service areas are being planned with adequate slab loading to have vibration free floors while access to services areas is also given utmost important with provisions of loading and unloading of heavy equipments.
MECHANICAL SYSTEM DESCRIPTION A.
Design Objectives
2
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 1. 2.
B.
To evolve sustainable and energy efficient design and engineering of HVAC system To develop and engineer integrated and cost effective building intelligence system.
General Requirements 1. Air conditioning & Ventilation systems to be designed & installed in accordance with the latest recommendations of ASHRAE and in confirmation with the latest International Building code, all local and National codes and the requirement of agencies exercising jurisdiction over work at the project. 2. All piping systems shall be complete with hangers, anchors, guides, valves, insulation, etc. 3. All duct systems shall be complete with hangers, volume dampers, fire dampers, smoke dampers, filters, diffusers, grilles, registers, insulation, etc. 4. All equipment shall be complete with vibration isolation, starters, control wiring, painting, insulation, etc. 5. All systems shall be fully tested and balanced. 6. The entire installations, commissioning and performance evaluation procedures shall be predetermined and documented.
C.
Design Criteria 1. The building is expected to be catered with varied need of air conditioning being multi facility. The systems are conceptualized to cater such needs with inherent features mentioned in subsequent Para.
2. The systems provided for this project shall meet the following parameters while satisfying all local design weather conditions and code requirements. •
Inside Design
:
As described in subsequent para.
3
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI •
Ventilation Rate for Air conditioning
:
ASHRAE 62.1 standard 2007
•
Working Cycle
:
24 hours for guest areas
•
Operational Diversity
•
Occupancy
•
Equipment and Lighting load
•
Ventilation Rate for Mechanical Areas :
: :
As per cooling load summary sheet :
As per cooling load summary sheet
Public Area toilets
:
50 cfm / WC
Guest Room Toilet
:
50 CFM
STP
:
35 ACH
Back of House Areas AC plant Room and Pump Room
3.
80%
: :
10 ACH
10 ACH
All other mechanical areas
:
6 ACH
Kitchen and Laundry
:
As per user’s requirement
Elevator Machine Room and Other User specific service areas
:
As per equipment Operating Parameters
Basic Consideration for cooling load calculation shall be as follows.
4
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Site
Latitude Mean sea level
:
VARANASI (UP STATE)
: :
25° 20' north 76 meters.
: :
: 109°F (42.78°C) 76°F (24.44°C) 21%
AMBIENT CONDITIONS SUMMER (May) Dry Bulb Temperature Wet Bulb Temperature Relative Humidity WINTER (January) Dry Bulb Temperature Wet Bulb Temperature Relative Humidity
: :
50°F (10°C) 47°F (8.33°C) : 80%
: :
94°F (34.44°C) 83°F (28.33°C) : 64%
All Year Round Dry Bulb Temperature
:
Wet Bulb Temperature
:
74 °F (23.3°C) for Guest Rooms and Public area 63.1°F (16.3°C)
MONSOON (July) Dry Bulb Temperature Wet Bulb Temperature Relative Humidity SPACE DESIGN CONDITIONS
5
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Relative Humidity
:
NMT 55%
D.
Cooling Load Estimation Summary Sheet :
As per enclosed Annexure
E.
Monthly Average Cooling Load Profile
:
As per enclosed Annexure
F.
Capital Cost Analysis of various system Alternatives
:
As per enclosed Annexure
G.
Yearly Operating Cost Analysis
H.
Monthly Operating Cost Analysis
:
As per enclosed Annexure :
As per enclosed Annexure
I. Mechanical Ventilation Systems o
The mechanical Ventilation systems are being considered to be designed for removal of heat and provide moderate dust free working environment.
o
The systems are designed based on the adequate no. of air changes per hour however areas with higher heat dissipation could be considered for designing with restricted temperature rise over ambient temperature.
o
Considering Varanasi Weather conditions we propose to install the evaporative cooling system to supply the fresh air to mechanical areas with greater heat dissipation like Pump Room and AC Plant Room.
6
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI o SR. NO
PARTICULARS
o
28 SPA 29 Sky Lobby 30 Restaurant
The special emphasis is given to mechanical ventilation of STP area with higher air changes per hour. EQUIPMENT
AREA (SQ.FT) OCCUPANCY HEAT LOAD(TR) CFM LEVEL LOAD(KW) Toilet ventilation system shall consist of cabinet type exhaust fans located at terrace level to cater theLVL-31 respective zone. 385 19232 5.0 125.07 51672
LVL-32 LVL-33
19232 19232
LVL-34 19232 31 Restaurant 3. Public STANDARDS TOTAL-HOTEL Areas( LVL -31 TO& 34CODES ) 76928
385 385
5.0 5.0
46 PENT HOUSE 1 To 4 & Lobby 47 48 49 50 51 52 53
PENT HOUSE 1 To 4 & Lobby 60038 6. IEC STANDARD PENT HOUSE 1 To 4 & Lobby PENT HOUSE 1 To 4 & LobbyRP 31.1 7. ISA STANDARD PENT HOUSE 1 To 4 & Lobby PENT HOUSE 1 To 4 & Lobby PENT HOUSE 1 To 4 & Lobby PENT HOUSE 1 To 4 & Lobby TOTAL-PENT HOUSES( LVL -53 TO 60)
GRAND TOTAL
LVL-53 LVL-54 LVL-55 LVL-56 LVL-57 LVL-58 LVL-59 LVL-60
7981 5540 : 7981 5540 : 7981 5540 7981 5540 54084
51672 51672
385
5.0
125.07
51672
1540
20.0
500.28
206688
125.07
51672
LVL-35 19232 385 5.0 32 Family Meeting Area Following STANDARDS & CODES will be applicable for the project. TOTAL-FAMILY MEETING ( LVL - 35 ) 19232 385 5.0 LVL-38 To 5 & Lobby STANDARD 34-2001 10520 : 33 Apartment1.1 ANSI/ASHRAE LVL-39 10520 34 Apartment 1 To 5 & Lobby LVL-40 Apartment 1 To 5 & Lobby 10520 35 LVL-41 10520 36 Apartment 1 To 5 & Lobby 2. ANSI/ASHRAE STANDARD 41.1-86-2001 : LVL-42 10520 37 Apartment 1 To 5 & Lobby LVL-43 To 5110-2002 & Lobby 10520 : 38 Apartment3.1 ARI LVL-44 10520 39 Apartment 1 To 5 & Lobby LVL-45 10520 40 Apartment 1 To 5 & Lobby LVL-46 10520 41 Apartment 1 To 5 & Lobby 4. ASHRAE 1991 LVL-47 10520 : 42 Apartment 1 To 5 & Lobby LVL-48 10520 43 Apartment 1 To 5 & Lobby LVL-49 10520 44 Apartment 1 To 5 & Lobby LVL-50 PART To 5 &STANDARD Lobby 10520 45 Apartment5.1 ASME PTC 19.2-1987 II : TOTAL-LONG LEASED APRT.( LVL -38 TO 50) 136760
125.07 125.07
125.07 51672 73Number5.0 58.82 designation & safety 28073 classification of 73 5.0 58.82 28073 73refrigerants 5.0 58.82 28073 73 5.0 58.82 28073 Measurements guide 73 5.0 58.82 28073 73Air conditioning 5.0 58.82 28073 & refrigerating equipment 73 5.0 58.82 28073 73nameplate 5.0 voltages 58.82 28073 73 5.0 58.82 28073 Terminology of Heating Ventilation 73 5.0 58.82 28073 Air 73 5.0 58.82 28073 conditioning & Refrigeration. 73 5.0 58.82 28073 73Instruments 5.0 & apparatus 58.82 28073 pressure 949 65.0 764.66 364949 measurements 58 4.5 53.35 25610 41IEC Standard 5.3 29.52 13370 voltages 58 4.5 53.35 25610 41Recommended 5.3 29.52 Specification, 13370 Practice, 58 4.5 53.35 25610 41 5.3 29.52 13370 58 4.5 53.35 25610 7 41 5.3 29.52 13370 396 39.0 331.48 155920
726148 7784 275.0 4197.58 1841560
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 8. SMACNA -1990
:
Installation, & Calibration of Flow meters HVAC Systems-Duct Design
9. SMACNA- 1985
:
HVAC air duct leakage test manual
10. SMACNA- 1985
:
HVAC duct construction standards-Metal & flexible I edition
13. SMACNA-1989
:
HVAC duct system inspection guide
14. SMACNA- 1989
:
Rectangular industries duct construction
15. SMACNA- 1977
:
Round industries duct construction
16. ANSI/ASHRAE/52.1-1992
:
Gravimetric & Duct spot procedure for testing air cleaning devices used in general ventilation for removing particulate matter
17. BS 6540, Part 1
:
Methods of test for atmospheric dust spot efficiency & synthetic dust weight arrestance
18. ANSI/ASHRAE 55-1992
:
Thermal environmental conditions for human
occupancy 19. CTI-ATC 105-1990
:
Acceptance test code for watercooling towers, mechanical draft, natural draft, fan assistant typeevaluation of results and thermaltesting of results and thermaltesting of wet and dry coolingtowers. (1990)
20. CTI-ATC 128-1981
:
Code of measurement of sound from water cooling towers
21. SMACNA 1984
:
Energy conservation guidelines
22. SMACNA 1991
:
Energy recovery equipment and Systems, air 8
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI to air 23. ANSI/ASHRAE-51-1985
:
Laboratory methods for testing fans for rating
ANSI/AMCA-210-1985 24. ANSI-UL-555-1990
:
Fire dampers
25. NFPA
:
Fire protection hand book 17th edition
26. TEMA 1988
:
Standards of tubular exchanger manufacturers association 7th edition
27. ASME/ANSI B-31.5/1987
:
Refrigeration piping
28. ANSI/ASME A-13.1/1981 (R 1985)
:
Scheme for identification of piping system
29. ANSI/ASHRAE 34-1992
:
Number designation and safety classification
of refrigerants 30. ASHRAE
:
Refrigeration oil
31. ANSI/UL/1963-1991
:
Refrigerant recovery recycling equipment, 1989
32. ANSI/ASHRAE/111-1988
:
Practices for measurement, testing and balancing of building, heating, ventilation, airconditioning and refrigeration system.
33. SMACNA
:
HVAC Systems- Testing, adjusting and balancing
34. ANSI/ASHRAE 62-1989
:
Ventilation for acceptance indoor air quality
and balancing, 1983 35. ASHRAE 90-1-1989
:
Energy Efficient Design of New Buildings except low rise residential buildings
9
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 36. ASHRAE 15-1994
:
Safety code for Mechanical Refrigeration
37. ASHRAE 100-1989
:
Guideline 1-1989 –Commissioning of HVAC systems.
IS CODES & STANDARDS: AIRCONDITIONING EQUIPMENT: 38. IS 659 – 1991
:
Safety code for airconditioning (revised) (Amendment 1)
39. IS 660 – 1991
:
Safety code of mechanical refrigeration (revised)
40. IS 6272 –1991
:
Industrial cooling fans (Man coolers) (1st revision)
41. IS 7896 -1991
:
Data for outside design conditions for airconditioning for summer months
42. IS 8188 -1988
:
Code of practice for treatment of water industrial cooling systems
43. IS 8362 -1991
:
Copper and copper alloy rolled plates for condensers and heat exchanges
44. IS 8667 -1993
:
Purchasers data sheet for cooling towers for process industry
45. SP 7 1983 Group 4
:
National Building code
ELECTRICAL WIRES & CABLES, LT & HT GRADE: 46. IS 694 -1977 Part I & Part II
:
PVC Insulated cables for voltage upto 1100V with copper and aluminium conductors 10
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI respectively 47. IS 732 -1989
:
Code of practice for electrical wiring installation
:
Code of practice for earthing
:
Specification for 3 phase induction motors
:
Measurement of sound insulation in buildings and
EARTHING: 48. IS 3043 -1966
MOTORS: 49. IS 325
NOISE & VENTILATION: 50. IS 9901 – Part I & Part II – Part 9-1991
building elements 51. IS 11050 – Part I, Part II & Part III- 1991
:
Rating of sound insulation in buildings and building elements
52. IS 14280 – 1995
:
Mechanical vibration – balancing – shaft and fitment key convention
53. Is 14259 – 1995
:
Vibration & shock – Isolators, procedure of
specifying characteristics 54. IS 12065 – 1987
:
Permissible limits of noise level for rotating electrical machines
55. IS 1950 – 1991
:
Code of practice for sound insulation of non industrial buildings (Amendment – 1)
11
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 56. IS 4729
:
Measurement and evaluation of vibration for motors. (Withdrawn)
PIPE & FITTINGS: 57. IS 638 – 1993
:
Gaskets
58. IS 1239- Part I, Part II 1990/1992
:
Mild steel tubes and fittings
59. IS 5822 – 1994
:
Code of practice laying of electrically welded steel pipes for water supply (2nd revision)
60. IS 6392 – 1988
:
Steel pipe flanges (Amendment 1)
61. IS 5312 Part I 1990, Part II 1991
:
Swing check type non return valves
62. IS 8418 – 1990
:
Horizontal centrifugal self priming pumps
63. IS 9542 – 1993
:
Horizontal centrifugal mono set pumps for clear,
PUMP AND VALVES:
cold, fresh water (Amendment 2) 64. IS 10981 – 1993
:
Class of acceptance test for centrifugal mixed flow and axial flow pumps – class B
65. IS 12992 – 1993 Part I, 1990 Part II
:
Safety relief valves
66. IS 13095 – 1991
:
Butterfly valve for general purposes
REFRIGERANT GAS & LUBRICANTS:
12
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 67. IS 10609 – 1991
:
Refrigerants – Number – designation
:
Code of practice for fire safety of building
SAFETY: 68. IS 1641 – 1993
(general): General principles of fire grading and classification (1st revision)
SHEET METAL WORK: 69. IS 277 – 1992
:
Galvanised Steel sheet (5th revision, Amendment 2)
70. IS 513 – 1963
:
Cold rolled low carbon steel sheets
71. IS 655 – 1991
:
Metal air ducts (revised) (Amendment – 3)
72. IS 1079 – 1994
:
Hot rolled carbon steel sheets
73. IS 1977 – 1992
:
Structural steel (ordinary quality)
74. IS 2026 – 1992
:
Steel for general structural purposes
75. IS 7613 – 1991
:
Method of testing panel type air filters for airconditioning purpose
TERMINAL INSULATION: 76. IS 3346 – 1990
:
Method of determination of thermal conductivity of thermal insulation materials (2 slab guarded hot plate method) (1st revision)
13
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 77. IS 4671 – 1990
:
Expanded polystyerene for thermal insulation
purposes (1st revision) 78. IS 10556 – 1990
:
Code of practice for storage and handling of insulation materials
79. IS 11239 – Part 1 to Part 13
:
Method pf test for cellular thermal insulation materials
VENTILATION: 80. IS 3103 – 1975
:
Code of practice for industrial ventilation
(1st revision) 81. IS 3588 – 1991
:
Electric axial flow fans (1st revision)
82. IS 4894 – 1991
:
Centrifugal fans (1st revision)
14
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI
PART B: ELECTRICAL: INTRODUCTION: The services system for the proposed 5 star hotel for KBJ group, has been conceptualized based on the master plan drawings and relevant IS / BS codes relevant for electrical system design and energy efficient devices to produce concept which is integrated as a whole. Total conceptual design is done from the point of view of energy efficacy and power distribution to provide clean power to equipments and other sensitive equipments. Wherever required modern state of the art control systems are envisaged for power optimization. The proposed planning is for ; Hotel Block – (1parking basements with services + Ground for hotel public areas + 1 st floor for rooms and public areas + 2nd to 7th typical room floors.
1.
DESIGN CRITERIA FOR POWER AND LIGHTING : A.
POWER LOAD:
15
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Power load are considered as per actual for facilities like lifts / kitchen equipments / plumbing equipments / HVAC equipments etc. General small power – other than equipments is considered as follows :
SR NO 1 2 3
4 5
AREA BOH FOH RESTAURANT
/
BANQUETS
POWER DENSITY 1 W / SFT 1W / SFT / 1 W / SFT
CONFERENCE
/
MEETINGS
/
LOBBIES CLUB AREA GUEST ROOMS
1 W / SFT 4 W / SFT
Other than above specialized equipment loads are considered as follows : Kitchens and bar all together for hotel - 300 KW Laundry - 50 KW Banquets / conferencing equipments – 14 KW SPA and Gym equipments - 60 KW HVAC high side load - 800 KW
16
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI HVAC low side for - 300 KW Plumbing load - 200 KW Lifts - all blocks - 50 KW Ventilation (basements / stair case / lifts / toilets / etc) - 100 KW Fire fighting load - 500 KW (not part of actual load on transformer). Based on the above total connected general power and equipments load comes to 2485 KW for all block put together. B.
LIGHTING LOAD :
Lighting load is derived based on the lux level provisions which are as follows : Sr.
Area
No. 1
Convention areas: Ball Room (Banquets)
Average Maintained
Watt/sft. Consider by
Lux
us
500
3W / sft
Light fixture basis.
CFL / CDMT / Halogen spots / QR 111 / Cove FTL
/
LED’s
with
2
Ball Room Foyer
350
3W / sft
dimming Halogen spots / QR
3
Meeting Rooms
400-(500FC on table top)
3W / sft
111 / Cove FTL / LED’s CFL / CDMT / Halogen spots / QR 111 / Cove FTL
/
LED’s
with
dimming 17
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 4
250
1W / sft
CFL / FTL / LED
5
Assembly and Circulation Public Areas : Main Lobby
300
2 W / sft
Halogen spots / QR
6 7
Assembly and Circulation Restaurants, Lounges, Bars, Coffee
250 200
1W / sft 3W / sft
111 / Cove FTL / LED’s CFL / FTL / LED CFL / CDMT / Halogen
8
Shops Administrative office areas ( at desk
9 10 11 12
level Front desk ( at desk level) Elevator foyer Corridors Guest Rooms
13 14 15 16
Back of House and Service Areas: Kitchen Areas Maintenance Areas Housekeeping Laundry
spots / QR 111 / Cove 500
2W / sft
500 100-200 100-200 500
2W 1W 1W 4W
/ / / /
sft sft sft sft
FTL
/
LED’s
with
dimming CFL / FTL / LED CFL / FTL / LED Halogen spots / QR 111 / Cove FTL / LED’s
500 500 500 500
2W 1W 2W 2W
/ / / /
sft sft sft sft
FTL / CFL with covers
Based on above total lighting load for hotel block including all services areas / BOH / restaurants /kitchens / ball rooms / prefunction / guest rooms / FOH / service apartments / lobbies / etc comes to 571 KW of connected load for total carpet area of 254189 sft.
2.
POWER REQUIREMENT COMPUTATION: Based on the above criteria power computation is done attached as ANNEXURE A with this report. From the same we have following quantities: 18
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Total Actual power: 1.92 MW / 2.02 MVA @0.95 p.f. Transformers: 1 x 2500KVA or 2 x 1250KVA – space requirement for 2 transformers shall be 2 nos x 5 m x 5 m OTS space at ground level. D.G. sets: (2 x 1250 + 1 x 500) KVA. – Space requirement for all generators shall be 15 m x 13 m OTS space at ground level. 1 incomer – 2 outgoing feeders 11KV H.T. panel of client in case of 2 nos transformers – Room of 6 x 5 x 3.5 m required at ground level. SEC D.P. Structure for overhead supply – 5 m x 5 m OTS space at ground level near road. Metering kiosk of SEC – 5 x 5 x 3.5 m room at ground level next to D.P. structure.
3.
SOURCE OF POWER SUPPLY AND OPERATION IN VARIOUS SCENARIOS Grid power of SEB shall be HT power made available for the project at 11 KV from nearby substation. HT metering and ring main unit shall be located on the Ground level within the complex or in a dedicated service block. From the H.T. panel the supply shall go to H.T. panel at basement from which it shall go to different transformers as per the ratings derived in point 2 above for various options.
4.
DG BACKUP CALCULATION AND CAPACITY COMPUTATION DG Backup calculation is shown in point 2 above for various options. As far as possible we have tried to make banks of similar rating sets with synchronizing of sets for lighting, AHU and power load and other group for chiller and utilities. This is done to keep fault level under control.
19
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI All lighting, UPS power, convenience power, Lifts, Plumbing Fire pumps, Central AC System, Pressurization System and Fans shall be supplied by DG set equipped with Auto Mains Failure panels along with synchronizing panels. Change over panels will switch over the above loads onto DG supply within 15-20 seconds (time shall be app 45 seconds with synchronizing). In case of repair/ maintenance or operational difficulty with any of DG set, these shall be manually interchangeable to meet the critical loads. Engine cooling shall be achieved by radiator type air cooled engines in case ground level installation. Residential type silencers shall be provided for each DG set. D.G. sets shall be with acoustic canopies. The noise level shall not be more than @75 db at 1 mtr distance from DG. The D.G. sets are planned for 100% back up power with underground diesel storage tank for capacity of 1 day diesel storage in case of nearest source of diesel is far off. The capacity for the same as computed below shall come to 1 tanks of 10 KL. SR NO 1 2 3 4 5 6 7
ITEM DESCRIPTION DIESEL CONSUMED AT 100% LOAD BY 1250 KVA GENSET DIESEL CONSUMED BY 2 SUCH SETS SHALL BE DIESEL CONSUMED AT 100% BY 500KVA GENSET DIESEL CONUSMED BY 1 SUCH SETS SHALL BE TOTAL DIESEL CONSUMPTION PER HOUR DIESEL REQUIREMENT FOR 24 HOURS FOR 100% LOADING CONSIDERING LOADING
UNITS
QTY
LTR / HR
275
LTR / HR
550
LTR / HR
105
LTR / HR
105
LTR / HR
655
LTR / DAY
15720
LTR / DAY
12576…say 10KL / 15
CONDITION AS 80% OVERALL
KL
DIESEL REQUIRED FOR 1 DAY 20
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI STORAGE
5.
HIGH SIDE POWER GENERATION & DISTRIBUTION SLD Power shall be tapped from SEB RMU at 11KV from substation of near by vicinity. KBJ shall install 1 no. 11KV H.T. panel with 1 incomer and 2 outgoing along in case we are going ahead with 2 nos transformers. From the two outgoing feeders of KBJ H.T. panel power at 11KV shall be fed 2 nos 1250 KVA transformers respectively. All the transformers shall be cast resin dry type with OLTC and RTCC panel located at ground level of Hotel block from which supply shall be fed to respective block main panel.
6.
LOW SIDE POWER DISTRIBUTION 415V distribution from the LT panel to the various service areas/facilities shall be carried out through a network of sub panels dedicated for lighting / raw power / UPS power / HVAC / plumbing / lifts etc. Power from sub panels shall be fed to equipments through XLPE insulated armoured cables / busbars of 1100 volts grade insulation. All main panels and sub panels shall be part of L.T. panel room at basement level. Sub distribution boards for lighting / UPS power / Raw power / Emergency lighting through inverter shall be located on each floor in the electrical shafts. Supply to these distribution boards shall be fed from sub panels at podium level with use of busducts.
21
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Design of distribution system will be such that the farthest point is restricted to 3% voltage drop from the transfer supply points. Complete Single line diagram is sent as part of schematic design package for further understanding of distribution system.
SWITCHING ARRANGEMENT Switching arrangement at various locations will be planned keeping in view the ease with which isolation can be achieved and also the level of fault protection desired at the particular current rating. In the L T panel, switching of incoming circuits will consist of ACBs, where as switching of outgoing circuits up to 630 amps will be four pole Moulded Case Circuit Breakers and above 630 amps will be ACB’s. Main distribution boards and sub-distribution boards will incorporate moulded case circuit breakers. Final distribution boards will incorporate miniature circuit breakers and earth leak circuit breakers. Besides, care shall be taken to achieve voltage drop of not exceeding 3 percent in the cables. INTERNAL WIRING SYSTEM The system of wiring shall consist of FRLS PVC insulated copper conductor wires in FIA and ISI marked PVC conduits. Minimum size of copper conductor shall be 2.5 sq.mm for lighting and 4/6 sqmm for power. Colour code shall be maintained for the entire wiring installation that is Red, Yellow and Blue for the three phases, Black for neutral and Green for earthing. Besides lugs providing ferruling shall also be provided for number coding and easy identification for maintenance purposes. The electrical system shall include wiring for light and power points from the final distribution boards. However, it is envisaged that critical areas shall have uninterrupted power supply, where even 1 second power shut down may not be acceptable.
22
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Where ever possible we shall have localized switching for convenience and operational purposes. Convenience power outlets will be provided throughout the Building.
7.
LIGHTING PHILOSOPHY AND CONTROL METHODOLOGY AND EMERGENCY LIGHTING Lighting for this type of project shall be dealt by lighting / landscape / interior consultant for all public areas for hotels, front of house areas, banquets, restaurants, meeting rooms, board rooms, guest rooms, guest corridors, kitchens (kitchen consultant), branded residences, residences, club level, spa, pool decks, landscapes, bars etc. We shall be give lighting design for all back of house areas like pantries / stores / services rooms / kitchens (if not given by kitchen consultant) / service passages / staff offices etc. General lighting of various spaces will be planned to provide the required illumination levels. General lighting shall be through energy efficient lamps and task lighting through the low power compact fluorescent lamps. Illumination levels for various areas shall be as described above in point 1. Where ever possible following features shall be incorporated for lighting: • Intelligent lighting system – Use of occupancy sensors for all closed cabins. • Dimming with mood controller lighting system for areas like restaurants / bar etc as per interior designer’s choice.
23
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI • Electronic ballast < 10% THD APFC type / Energy efficient lamps EMERGENCY LIGHTING As per industry standard emergency lighting shall be planned in all public areas / guest corridors / parking / guest rooms / etc where by complete darkness during switchover time from grid to D.G. is not allowed. Hence the system is designed to have 10% lighting for all hotel block public areas including BOH and parking to be on UPS for which UPS / inverter of app. 40 KVA shall be required which shall require space of app. 3 m x 3m x 3m room. Guest rooms though shall not have any emergency lights.
8.
EARTHING PHILOSOPHY Distribution earthing shall be carried all along the LT distribution system, or through local earth station and effectively bonding the cables / equipment as the case may be. Earthing for light and power points shall be carried out with insulated copper earth wire running throughout the length of circuits and shall be terminated at boxes, fixtures etc with effective bonding to main earth. Separate and distinct earth stations with copper plates shall be provided for UPS System, EPABX, Computer System and equipments in critical areas if any. Chemical earthing shall be adopted as they are maintenance free for 15 years. LIGHTNING PROTECTION Building shall be protected by providing technically advanced (Early Streamer Emission) lightning protection system. This system shall include air terminal on top of the building, screened insulated cable as down conductor, lightning event counter
24
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI and low impedance earthing grid. From air terminal to the low impedance earthing grid, only one conductor will be used. This system eliminates requirement of multiple horizontal and vertical down conductors. 9.
POWER FACTOR IMPROVEMENT Automatic power factor compensation with capacitor banks shall be provided for maintaining minimum power factor of 0.95, as per the requirement of Local Electricity Board.
10.
UNINTERRUPTED POWER SUPPLY SYSTEM (UPS) UPS shall play a major role in the facility for sensitive equipments loads like computers / printers / fire alarm systems / CCTV system / access control system / security check equipments and charging points etc. The requirement for the UPS shall largely depend on the communication / AV requirements which are to be given by A/V consultant. Though we have made data sheets as per four seasons standard guidelines to conclude on requirement for the same. For the annexure A if becomes clear that UPS of approximately 76 KW / 100KVA at 0.9 pf and 80% loading shall be required. We recommend to use 2 x 50 KVA for the same. Ideally considering redundancy one should go with 3 x 50 KVA system where by n+ 1 redundancy shall be achieved. The UPS rating though shall be reviewed once we have final BOH interior plans freezed. Battery backup up to 30 minutes shall be provided with UPS. Storage batteries shall be sealed maintenance free type. Static bypass switch shall be provided with isolation transformer in the bypass line. UPS shall be designed for near unity power factor. As 100% power back up is available the UPS shall be backed up by generators.
11.
COMMUNICATIONS SYSTEMS: Various low voltage system shall be part of the building. The systems which can be integrated are as follows : Telecommunication System
25
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI LAN system MATV For above systems requirements are to be given by A/V consultant based on which low side wiring of Cat 6 shall be designed by us. Any other specialized wiring like fibre back bone / speaker / projector cabling etc shall be scope of IT contractor.
12.
STANDARD CODES AND BRIEF SPECS FOR MATERIALS :
A.
APPLICABLE IS STANDARDS
1.
METERS (MEASURING) FOR ANALOG METERS
2.
INSTALLATION AND MAINTENANCE OF SWITCH GEARS
3.
CODE OF PRACTICE FOR EARTHING
4.
H.D. AIR BREAKER, SWITCH GEARS AND FUSES FOR
IS:1248-1986 IS:3072-1975 IS:3043
VOLTAGE NOT EXCEEDING 1000 VOLTS 5.
SELECTION, INSTALLATION AND MAINTENANCE OF FUSES
IS:4047-1977 IS:8106-1966
UP TO 650 VOLTS 6.
GENERAL REQUIREMENTS FOR SWITCH GEAR AND
IS:4237-1967
GEAR FOR VOLTAGE NOT EXCEEDING 1000 VOLTS 7.
DEGREE OF PROTECTION PROVIDED BY ENCLOSURES FOR LV S/GEARS
IS:2147-1962
26
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 8.
INSULATED CONDUCTOR RATING
IS:8084-1972
9. ENCLOSED DISTRIBUTION FUSE BOARDS AND CUT-OUTS FOR VOLTAGE NOT EXCEEDING 1000 VOLTS
IS:2675-1983
10.
MINIATURE CIRCUIT BREAKER
IS:8828-1978
11.
FUSE WIRE USED IN RE-WEARABLE TYPE ELECTRIC FUSES UP TO 650 VOLTS
IS:9926-1981
12.
PVC INSULATED ELECTRIC CABLES HEAVY DUTY
IS:1554 (PART I)
13.
RECOMMENDED CURRENT RATING FOR CABLES
IS:3961(PART II)
14.
COPPER CONDUCTOR IN INSULATED CABLES AND CORES
IS:2982
15.
CONDUCTOR FOR INSULATED ELECTRIC CABLES AND FLEXIBLE CORDS
16.
IS:8130
MILD STEEL WIRES, STRIPS AND TAPES FOR ARMOURING CABLES
IS:3975
17.
PVC INSULATION AND SHEATH OF ELECTRIC CABLES
IS:5831
18.
ALUMINIUM CONDUCTOR FOR INSULATED CABLES
IS:1753
PVC INSULATED AND PVC SHEATHED SOLID ALUMINIUM
IS:4288
19.
CONDUCTOR CABLES OF VOLTAGE RATING NOT EXCEEDING 1100 VOLTS 20.
RECOMMENDED CURRENT RATING FOR CABLE
IS: 961
21.CODE OF PRACTICE FOR ELECTRICAL WIRING INSTALLATION SYSTEM VOLTAGE NOT EXCEEDING 650
IS: 732
27
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI VOLTS 22.CODE OF PRACTICE FOR FIRE SAFETY OF BUILDINGS GENERAL)ELECTRICAL INSTALLATION
IS: 1646
23.
RIGID STEEL CONDUITS FOR ELECTRICAL WIRING
IS:1653
24.
FITTINGS FOR RIGID STEEL CONDUITS FOR ELECTRICAL
IS:2667
WIRING 25.
FLEXIBLE STEEL CONDUIT FOR ELECTRICAL WIRING
IS:3480
26.
ACCESSORIES FOR RIGID STEEL CONDUITS FOR
IS:3837
ELECTRICAL WIRING 27.
PVC INSULATED CABLES (WIRES)
IS:694
28.
RIGID NON-METALLIC CONDUITS FOR ELECTRICAL WIRING
IS:2509
FLEXIBLE (PLAYABLE) NON-METALLIC CONDUITS FOR
IS:6946
29.
ELECTRICAL INSTALLATION 30. 31.
THREE PIN PLUGS AND SOCKETS
IS:1293
CONDUCTORS FOR INSULATED ELECTRICAL CABLES AND
IS:8180
FLEXIBLE CODES 32.
SPECIFICATION FOR CONDUIT FOR ELECTRICAL INSTALLATION
33.
IS:9537-1980
ACCESSORIES FOR NON-METALLIC CONDUITS FOR ELECTRICAL WIRING
IS:3419
34.
SWITCHES7
IS:3854
35.
PLUGS
IS:6538
28
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 36.
SHUNT CAPACITORS FOR POWER SYSTEMS
IS:2834-1954
37.
HRC CARTRIDGE FUSES AND LINKS UP TO 660 VOLTS
IS:2208
38.
GENERAL AND SAFETY REQUIREMENT FOR LIGHTING FITTINGS
39.
IS:1913-1969
CODE OF PRACTICE FOR LIGHTING PUBLIC THOROUGH FARES
IS:2944-1981
40.
WATERPROOF ELECTRIC LIGHTING FITTINGS
IS:3528
41.
WATER TIGHT ELECTRIC LIGHTING FITTING
IS:3553-1966
42.
MILD STEEL TUBULAR AND OTHER WROUGHT STEEL PIPE FITTING
IS:1239-1958
43.
LUMINARIES FOR STREET LIGHT
IS:2149-1970
44.
HRC FUSES HAVING RUPTURING CAPACITY OF 90 KA
IS:9224
45.
EXHAUST FAN
IS:2312-1967
46.
CLASS I CEILING FAN
IS:374-1979
47.
DANGER NOTICE BOARDS
IS: 2551
ADDITIONALLY WE SHALL FOLLOW : a.
Indian Electricity Act of 1910 and rules issued there under revised up to date.
b.
Special Attention should be given to Rule No. 50.
c.
Regulations for electrical equipment in building issued by The Bombay Regional Council of insurance Association of India.
B.
BROAD SPECIFICATIONS
29
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI ITEM Unitised substation / Trafo / Breaker D.G. sets
BROAD SPECIFICATIONS Indoor type with Vaccum / SF6 H.T. beaker / 11KV dry type cast resin transformer Radiator type with air cooling. Switchgears shall be with microprocessor based release switchgears. Panels shall be compartmentalized with live parts separated with hylum sheets / metal sheets. Separate cable alleys /
Switchgears / PCC / MCC
busbar alleys shall be planned in panels. Tinned EC grade Copper busbars shall be used. Fabrication shall be from 2 mm flats for structure and 1.6 mm for doors. The panel shall be powder coated with
H.T. / L.T. cables
seven tank process. XLPE grade copper cables as per FS standards.
Busduct / risers
Tinned EC grade Copper busbars.
Distribution boards
Factory fabricated, double door type with per phase isolation for 3 phase boards With modular accessories for BOH areas and high end range for guest floors as suggested by interior
Point wiring
architect, HFFR grade wires and PVC FRLS grade couduits of general areas and MS conduit for services
Light fixtures - indoor
areas like kitchen and plant rooms. CFL type for staff areas / CFL type down lighters in general areas and FTL type tube light fixtures for basements / pantries etc. Metal halide indirect fixtures with 12' poles for 20 ft roads / 150 W sodium vapour street lights for 6 mtr
Light fixtures - outdoor
and above roads / metal halide flood lights for façade lighting / other planter lights and bollards for
Telephone wiring
landscape. Backbone with multipair 0.5 mm dia XLPE jelly filled armoured cable. Outlets wired with Cat 6 wires.
Data wiring
Outlet wired through Cat 6 wires from floor IT room. Back bone as per clients IT dept.
Raceways - floor
Al / GI raceways with company fabricated junction boxes for voice / data and UPS power wiring.
Raceways - Wall Cable trays
PVC raceways with compartments Hot Dip GI of 14 guage perforated type for power cables. Metal powder coated / GI - enclosed type for
30
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI communication – AV cables. UPS
IGBT based parallel redundant UPS with 0.9 power factor and THD < 3%
PART D: - WATER MANAGEMENT, PUBLIC HEALTH & SANITATION D.1 Project Brief a. Conceptual Plan a) The Concept report is based on the architectural concept plan given by client/architect. b. Soil Investigation a) The information regarding the sub-soil characteristics of site is not available. Detailed storm water harvesting design shall be taken up based on the available soil report. b) Site test to find out water absorption capacity / percolation rate of soil shall be carried out for detailed design of percolation / harvesting well. c. Climatic Data The design of the water management system shall be done keeping in view the detailed climatic data like rainfall, temperature variation, etc. of the region.
31
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI d. Water Quality The quality of water from all the sources shall be checked. The major source of fresh water shall be municipal corporation supply. Client to furnish water test reports for the same. Client to check and explore the possibility of water supply through bore wells / tankers for any future provision and emergency. Suggestion regarding the treatment of water required, if any, shall be given from the water test report. e. Drainage and Storm Water Connection
The pipe size and invert levels for nearby municipal sewers and storm water drains shall be furnished by client for final design of sewage and storm water disposal. D.2 Assumptions
a) Average annual rainfall in the vicinity – 1000 mm. b) Maximum intensity of rainfall – 50 mm/hr. c) Area of soft landscape is 15% of the site area. d) Source of water supply will be corporation supply, bore-wells and tankers. e) All the sewage generated in the building shall be treated in a Sewage Treatment Plant (STP) with a bypass connected to Municipal drains to meet emergencies. The recycled water shall be used for flushing, air-conditioning and irrigation.
f) 30 cum/hr rate of water percolation assumed for rain water harvesting. g) Water efficient and low flow fixtures will be used in toilets. h) Water less urinals can be used in certain areas i) All the surface and terrace rain water runoffs shall be drained through well designed storm water disposal system after adopting suitable rain water harvesting system.
32
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI D.3. Water management system Infrastructure Requirements Overall the Water management system consists of: a) Water supply b) Hot water and steam generation and distribution. c) Sewerage disposal system. d) Sewage treatment scheme. e) Storm water drainage system. f) Rain water harvesting. g) Sanitary vessels and water management system fixtures. D.3.A. Water Supply The main source of domestic water supply will be water supplied by Municipal Corporation. As per the inputs received from the client, Corporation will not supply sufficient quantity of fresh water. The quality of water from Corporation will be assured. Suggestion for the water treatment can be given from the water test report for all the available sources of water. The other source of water may be water from bore wells and tankers. Water supply required for various usages are categorized as follows: A. Raw Water: The water available from bore wells and tankers is the raw water and shall be stored in the raw water tank in the basement. Water treatment plant shall be designed based on the chemical and physical analysis of water from the sources identified. This
33
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI treated water shall be collected in the fire water tank. Water from this fire water tank shall overflow into the domestic water tank. B. Domestic Water: Treated water from the raw water tank, after over flow from the fire water tank shall be stored in the domestic water tank. The water supplied by the local authority also, shall be collected in this tank. This will be supplied for all the domestic purposes such as showers, wash basins and health faucets in all the toilets; in laundry for washing clothes; and for steam generation. RO/UV units installed at the points of consumption shall further treat the water to make it potable and this potable water shall be used in the kitchen for cooking and for drinking. C. Recycled Water: Sewage Treatment Plant (STP) shall be installed to treat all the sewage and sullage generated in the premises of the hotel. The STP shall be able to treat the sewage to generate clear water which can be used for flushing, irrigation and for HVAC make up, after further treatment. Provision will also be kept to use domestic water for flushing in absence of or in case of shortfall of recycled water.
Assumptions for Water Supply Calculations for the hotel: Occupancy per room type: Average occupancy per room is considered as 1.5 Water requirement: (as per NBC - Part - 9, Clause 4.1.2.) No.
Use of water
Water requirement (lpcd) Domestic Domestic hot Flushing cold 34
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 1 2. 3.
Guest rooms Banquet hall guests Hotel staff
160.00 4.00 25.00
100.00 1.00 20.00
60.00 10.00 45.00
Based on these assumptions, the water requirement is as follows: Type of rooms First Second Third Fourth Fifth Sixth Seventh Total Persons per
Twin bed room King's room Jr. Suite Ex. Suite 12.00 12.00 14.00 18.00 32.00 32.00 18.00 7.00 18.00 2.00 38.00 118.00 7.00 2.00
room Total no. of guests Rounded
1.50
1.50
1.50
1.50
57.00 57.00
177.00 177.00
10.50 11.00
3.00 3.00
Water requirement for guest rooms: Type of room
Twin bedroom
King’s Jr. Suite room Water requirement (lit)
Ex. Suite
Domestic cold (lpd) Domestic hot
9120.00
28320.00
1760.00
480.00
39680.00
(lpd)
5700.00
17700.00
1100.00
300.00
24800.00
35
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Flushing (lpd)
3420.00
10620.00
660.00
180.00 Total
14880.00 79360.0 0
Water requirement for banquet hall guests: Banquet hall number No. of guests per hall as per heat load
1 102.00
2 101.00
3 102.00
calculations Water requirement (lit) 408.00 404.00 408.00 1224.00 102.00 101.00 102.00 305.00 1020.0 1010.0 1020.0
Domestic cold (lpcd) Domestic hot (lpd) Flushing (lpd)
0
0
0
3050.00 4575.0
Total
0
Water requirement for staff: 165.0
2.0
Total No of rooms
0 Staff per room 330.0
Total staff
0 lpcd 25.00 20.00 24.00
Domestic cold Domestic hot Flushing Total
0
lit 8250.00 6600.00 7920.00 22770.00
36
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Water requirement for laundry (as per input from hotel consultant): Hot @ 74 Deg C.
12000.00
Ambient (lit) 25000.00 (lit) Water requirement for kitchens (as per input from hotel consultant): Ambient (lit)
46000.00
Hot @ 60 Deg C.
9200.00
(lit) HVAC make up water requirement: Make up water quantity = Tonnage X 10 lit X 24 X 0.7 Tonnage
1015.70
Make up water
170637.60
quantity
Summary of water requirement: Guest room Banquet halls Staff Laundry Kitchen A/C make up Total
Domestic cold Domestic hot Recycled 39680.00 24800.00 14880.00 1220.00 305.00 3050.00 8250.00 6600.00 7920.00 25000.00 12000.00 46000.00 9200.00 170637.60 120150.00 52905.00 196487.60
Total water requirement:
369542.60 (lit)
37
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Add wastage Sum Total Say
Domestic Cold Domestic Hot 2% 2% 2403.08 1058.12 122553.08 53963.10 123000.00 54000.00 Sum total water requirement (lit)
Recycled 2% 5124.415 261334.98 261500.00 377500.00
Quantity of water going into STP: Total water requirement Deduct A/C make up Volume of water going into STP @
369542.60 170637.60
90% of
198905.00
Generation of sewage @ 90% of water requirement without wastage 179014.1 Daily sewage quantity
5 Lit STP capacity
Load condition 100% 90% 80%
(lit) 179014.15 161113.05 143211.60
179.01 m3 STP capacity (m3) 179.01 161.11 143.21
38
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI
Irrigation water requirement (lump sum)
30.00 m3
30000.00 Lit
Break up of recycled water requirement: Description Flushing water requirement HVAC makeup Irrigation Total Shortfall
Value 25850.00 170637.60 30000.00 226487.60 74325.28
Unit Lit Lit Lit Lit Lit
Hence additional 74325.28 lit water will have to be sourced from bore wells/tankers
39
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Proposed Water Storage System:
SCHEMATIC ARRANGEMENT OF WATER TANKS
40
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Tank capacities Volume Description Raw water (half of total domestic water tanks capacity) Domestic water (half of total domestic water tanks capacity) Fire water Flushing and irrigation water (recycled + treated domestic) HVAC make up water (softened recycled + treated domestic)
(lit) 189000.00 189000.00 200000.00 126000.00 256000.00
We have considered total one and a half day of storage capacity for the entire project including fire fighting tanks Water storage and treatment: Domestic water: Water from bore-wells / tankers (raw water) shall be brought to the building at approximately 1 m below ground level in raw water tank. Water supplied by Municipal Corporation shall be stored in the domestic water tank. From Raw water tank, water shall be fed to suitable water treatment plant by means of feed pumps and stored in the fire water tank, overflow of which shall be given in domestic water tank. The treatment for raw water will consist of filtration through pressure sand filters, activated carbon filters. Water treatment philosophy shall be detailed out based on the chemical and physical analysis of water from bore wells / tankers. Since the quantity of water supplied by corporation may not be consistent, we propose to mix water treated water with the water supplied by Municipal Corporation.
Drinking water:
41
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Domestic water shall be treated by UV/RO filters and shall be supplied for drinking and cooking. These UV/RO filters shall be installed at the points of consumption i.e. all the kitchens and near the central water cooler for the hotel. Recycled water: Water treated by STP is termed as recycled water. It shall be collected in the underground tank meant for the same and shall be supplied to all the WCs and urinals for flushing, and for irrigation. This recycled water shall be further treated for softening and shall be stored in the soft water tanks. This softened water shall be used for HVAC make up. Since recycled water supply is less than requirement of flushing, irrigation and HVAC make up, it shall be supplemented with domestic water. Hence an additional overflow of fire water tank shall be given in the recycled water tank. There shall be a proper system to receive 15 to 20 tankers daily with well planned entry and exits so as not to disturb the overall traffic movement within and outside the premises. We also suggest entering into a long term agreement with reliable tanker suppliers providing consistent quality of water. Since fresh water deficit is supplemented with bore wells, it is suggested to have a resistively test and hydro-geological survey to ensure good quality consistent water supply throughout the year. Standby bore wells shall also be planned for the same. The water received everyday shall be randomly checked for physical, chemical and microbial analysis to ensure that water quality is maintained. Water Distribution and Supply System: There will be a separate pumping and distribution system for domestic and flushing water. Hydro-pneumatic pressure boosting system comprising of 2 working and 1 standby pumps shall be installed in the pump room in basement near the tanks, which will feed domestic water to each facility at pressures between 2.5 kg/cm2 to 4.5 kg/cm2. The same system will be used to feed the overhead fire fighting make up tank.
42
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Similarly, a separate hydro-pneumatic pressure boosting system will be provided near the recycled water tanks to supply flushing water tank to each facilities. Provision will be kept to feed STP recycled water tank with domestic water to meet the shortfall in the requirement of recycled water. Small capacity make up tanks, at terrace/roof level, are proposed for domestic and flushing water so as to ensure continuous flow of water to each facility even during DG change over periods during electricity failures A separate hydro-pneumatic system shall be installed in the basement near the main tanks, for providing domestic water to laundry, all the toilets and other requirements in the basement. From soft water tank, water shall be fed to HVAC make up tank constructed near cooling towers, minimum 1.5 m above the basin, through a set of transfer pumps (1 W + 1 S) with automatic level controllers. Soft water shall be supplied to the cooling towers through gravity from this make up tank. Provision shall also be made to supply suitably treated and softened tanker / bore-well water or domestic water into the soft water make up tank to meet any emergency situations. From recycled water tanks, water will be fed to all the gardening and irrigation needs with the help of independent hydro pneumatic pumping system. Hot Water for guest rooms and other public areas shall be supplied through the same domestic water hydro pneumatic system so as to ensure equal pressures at the user points. A separate network of hot water supply shall be provided with a provision of return line and a circulation pump to ensure instant hot water at the user point and minimize the heat loss in the pipe network. For Hotel guest rooms, the entire water supply system shall be designed to supply water at pressures between 2.5 kg/cm 2 to 4.5 kg/cm2 at the user points. For all the BOH areas, the water shall be supplied at a pressure between 1.5 kg/cm2 to 2.5 kg/cm2. It shall be ensured that the pressure of hot and cold water remains the same at the user points.
43
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI D.3.B. Generation and distribution of hot water and steam: Quantity The total peak hot water requirement is about 54,000 liters per day. (Refer above table for domestic water requirement calculation). Most of the hot water is used for guest rooms, kitchen – BOH areas and laundry. The total peak steam requirement for laundry is assumed to be 350 kg/hr. For kitchen steam, standalone units shall be provided in consultation with the BOH / Kitchen consultant and the required quantity of hot water shall be supplied to the same. Assumptions Following criteria is considered for the design of hot water and steam supply system: 1.
Water supply for 24 hours to all required facilities.
2.
Steam supply to laundry area as per BOH consultant’s requirement
3.
All hot water and steam lines will be insulated.
Hot Water Production and Distribution It is proposed to produce hot water by providing hot water generators with dual burners capable of firing on natural gas and HSD. Three (2 working + 1 Standby) numbers of hot water generators, each of capacity 300,000 K. Cal are proposed to be installed in the basement. These generators will be gas / HSD fired and will receive cold water from feed water tanks through feed water pumps. The feed water will be from the domestic water tank in basement, pumped through a polishing softener so as to maintain the hardness within 5 ppm (soft water). Hot water from the generators will have a temperature of around 80 degree C and this will be the heating medium to heat the cold water in pressurized hot water mixing tanks provided in boiler room for different requirements. Cold feed to all these pressurized hot water mixing tanks will be from the respective hydro pneumatic system for domestic water supply for different requirements. Hot water from the generators will be pumped and supplied to these hot water mixing tanks as heating medium through M.S piping and the return water after transmission of heat to cold water in the mixing tanks will be collected and pumped through return pumps into the generators.
44
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI It will be ensured that the same pressure is maintained for hot and cold water supplies at the user points as the same hydro pneumatic booster system will be used for hot and cold domestic water supply. Hot water return lines will be provided and a circulation pump will be installed to ensure a constant hot water supply at each user point. Steam It is assumed that the steam requirement is generally in hotel back of house areas, primarily in the laundry for use in flat workers, driers and presses. It is also required in kitchen and in health clubs. As it is not advisable to carry high-pressure steam to high levels, use of steam in hotel public areas (for kitchen and health club) in the building is not contemplated. Thus use of steam in the building is confined to laundry areas only. Steam Production and Distribution It is proposed to have two (1 working + 1 standby) no 350 kg/hr IBR steam boilers, with dual fuel burners – Natural gas and HSD. Heating medium in the boiler can be electricity, oil or gas. Even though electrically operated boiler is the cleanest, as the cost of electricity is prohibitive, it is not advisable to use electricity as heating medium. Natural gas / HSD are cheaper compared to electricity so we suggest using dual fuel burners so as to have a flexibility of using either of the fuels. As the peak requirement is only about 350 Kg per hour, one boiler will be working continuously and second boiler will always be in a standby mode giving 100% standby capacity. These boilers will deliver steam to a steam header from which separate branches will be provided for supply to laundry and BOH areas, If required. Cold water feed for the boiler will be water having a commercial hardness of Zero (0 to 5 ppm of hardness) stored in feed water tanks and pumped to the boilers by feed water pumps. Water from the domestic water compartment in basement softened by polishing softeners to zero hardness will be stored in the feed water tanks and this will be the boiler cold feed. Steam condensate from equipments where steam is indirectly used will be collected and brought back to the feed water tanks to minimize heat losses in the system to the maximum extent possible.
45
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI D.3.C. Sewerage Disposal System General Client shall check if there is any municipal sewer line in the abutting road and the pipe diameter, invert level and depth of the said man hole chamber shall be furnished for designing the final connection to the sewer line. Provision shall be made for future connection and by-pass of sewage treatment plant. A sewage treatment plant shall be provided. Client has confirmed that the treated sewage and wastewater will be re-used flushing, air-conditioning and irrigation. Provision shall be made to dispose the sludge generated after STP into the nearby existing drainage manhole of corporation. Alternatively, sludge can be dried using filter press or centrifuge within our premises and dried sludge can be used as manure for irrigation. Sewerage Disposal The waste water and soil water shall be collected from toilet blocks / kitchen to main drainage network. From toilets and kitchen, soil and wastewater shall be passed through gully trap chamber before connecting the same to main drainage line. Waste water from kitchens and pantry shall be passed through a grease trap before connecting to the drainage network. The main drainage line shall discharge the soil and wastewater to sewage treatment plant for recycling the water for re use. The recycled water shall be used for flushing, irrigation and for HVAC make up after softening. D.3.D. Sewage Treatment Scheme Possible Options of Sewage Treatment Plants 1. Membrane Bio Reactor (MBR) 2. FAB
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 3. SAFF 4. Chemical Treatment 5. Extended Aeration Out of all the above five possible options, we suggest to install MBR technology STP. Client has also confirmed using MBR technology STP. The comparison of MBR with other technologies is given here in under: No.
Description
Extended
SAFF
FAB
Chemical
Aeration 1
Type of Treatment
MBR
Treatment
Based on
Based on attached
Based on attached
Plants Based on
Based on
suspended growth
growth process
growth process
continuous batch
activated
process
sludge
of bacteria
process with 2
Media used for
No Media required
treatment
Utilizes plastic
Utilizes plastic media
Utilizes three non
ultra filtration Utilizes
media floating in
fixed in position
toxic, non
membranes
hazardous
for treatment
sewage
chemical 3
Final Clarifier required?
Yes
Yes
Yes
4
Tertiary Filter required?
Yes
Yes
Yes
47
formulations Yes Yes
No No
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI
No.
5 6
Description
MLSS (mg/l) M.L.S.S. monitoring
Extended
SAFF
FAB
Chemical
MBR
Aeration
Treatment
< 3000
Plants No criterion as it
15,000 -
works on physio
20,000
Required
No criterion
No criterion
Not Required
Not Required
chemical
Required
reactions such as precipitation, disinfection, flocculation & 7 8
9
Footprint area Process Stability
Retention Time
10
Sludge Recycling
11
Power Consumption
Large
2-3 times smaller
2-3 times smaller
clarification 2-3 times smaller
3-5 times
Highly Sensitive to
Medium Sensitive to
Medium Sensitive to
Medium
smaller Not Sensitive
Sludge Bulking
Sludge Bulking
Sludge Bulking
Sensitive to
to upsets
Sludge Bulking 6 - 8 hrs
20 - 24 hrs
6 - 8 hrs
6 - 8 hrs
Required
Not Required
Not Required
Not Required
Not Required
High
Medium
Medium
High
High
48
4 - 6 hrs
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 12
Ease of Maintenance
Difficult
Easy
Easy
Easy
Easy
13
Ease of Operation
Difficult
Easy
Easy
Easy
Easy
No.
Description
Extended Aeration
Chemical SAFF
FAB
Treatment
MBR High
High
Medium
Medium
Plants High
No
Yes
Yes
Yes
Yes
High
Medium
Medium
Very High
Very Low
Yes
Yes
Yes
Yes
No
Required
Required
Required
Required
Not Required
of sewage treatment a) Sludge Production
High
Low
Low
Low
Low
b) Reduction of Coliform
Ineffective
Ineffective
Ineffective
Effective
Effective
c) Use of Coagulants and
High
Moderate
Moderate
Very High, since
Not required
14
Energy Cost
15
Useful for modification / capacity extension of existing STP ?
16
Use of Chemicals for pre-treatment / post treatment
17
Requirement of Continuous monitoring for the treatment plant
18
Chlorination
19
Environmental Aspect
Flocculants
it is a chemical
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI process plant d) Use of Chlorine
No.
Description
e) Residual Chlorine
Required as per
Required as per
Required as per
sewage load
sewage load
sewage load
Extended
Not required
High Chemical
SAFF
FAB
Treatment
MBR
Yes
Yes
Yes
Plants Yes
No
Moderate
Good
Good
Good
Of the quality
Aeration
Presence in treated water f) Quality of Treated Recycled water g) Overall Cleanliness of 20
the plant area Dependency on the
of potable Bad
Moderate
Moderate
Moderate
water Good
Moderate
Moderate
Moderate
Very High for the
Moderate
vendor for routine
chemicals
operation
procurement
Effluent Characteristics The effluent generated during activities contains mainly: 1. Suspended / colloidal organic components like food waste, toilet flushing, basins and hand wash, etc. 2. Dissolved organic components 3. Dissolved inorganic solids of cleaning chemicals
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Raw Sewage Characteristics Flow -
350 cum/day
PH
-
7–8
BOD
-
250 - 350 mg/l
COD
-
500 - 600 mg/l
O&G-
~ 60 mg/l
TSS
300 mg/l
-
Treated Sewage Characteristics For Re-use Flow
300 cum/day
PH
7–8
BOD
< 5 mg/l
COD
< 30 mg/l
O&G
< 5 mg/l
TSS
< 5 mg/l
Assumptions 1.
No other parameter which exceeds the treated sewage limits or which is hazardous in nature, will affect the biological
process is present in the raw sewage. 2.
The oil present is in free-floating form. Process Description The brief process description for MBR sewage treatment process is as follows: 1. Sewage from main drain line is collected through gravity pipes into a screen chamber. This manually cleaned screen is provided to remove floating and big size particles, which may choke the pumps and pipe lines.
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 2. Screened sewage is then passed through equalization tank to homogenize the sewage quality and also even out flow fluctuations and feed sewage of uniform quality at constant rate to subsequent treatment units. Air mixing is also provided to mix the contents of the equalization tank. A coarse bubble aeration grid is provided to distribute air uniformly at the base of the equalization tank. 3. After above treatment, raw sewage is fed into aeration basin. 4. In aeration tank MLSS (mixed liquor suspended solids) in the range of 12000 to 15000 mg/l are maintained. The high amount of bacteria gives better and complete removal of organic matter from the raw sewage in relatively small area. Oxygen required for the bacteria is supplied through the blower. The air is used both for scouring of membranes and supplying oxygen to bacteria. 5. The filtration is carried out by the suction pump directly sucking permeates water. The permeate water produced is clear and devoid of bacteria and viruses to the minimum levels. 6. As the membranes are continuously under operation, they are polluted with organic or inorganic substances. Hence, chemical cleaning is carried out once in two to three months for removing substances polluting and clogging the membranes. Normal cleaners used are sodium hypo chloride and citric acid. Benefits for MBR Technology STP MBR (Membrane Bio Reactor) is the latest technology in wastewater treatment with many advantages as listed below: 1. MBR requires much less space when compared to conventional activated sludge process. 2. MBR does not require clarifier tank where as conventional activated sludge process requires clarifier, which further adds to the area requirement and cost. 3. Biological reaction in MBR can be carried out under the condition of 4 to 5 times of MLSS compared to conventional activated sludge process. It means the biological reaction is faster and more organic components included in the feed
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI wastewater can be decomposed in shorter time or in smaller space. This also gives good treatment efficiency and high stability of sludge, which is easy to dispose off. 4. The quality of treated water in case of MBR is much superior than conventional biological systems. As the membrane acts as a physical barrier, it does not allow any sludge particles and to great extent bacteria and viruses to pass through it. Microorganisms like coliform or cryptosporidium can be easily removed in MBR. This increases the reliability of the system multifold. 5. Conventional biological systems require further costlier tertiary treatment to match the performance of the MBR system. This may include coagulation, filtration, chlorination, adsorption, UV treatment etc. 6. MBR system has minimum number of treatment units and very simple to operate. It does not require any regular handling of hazardous chemicals. As the treatment units are less, it is less prone to system breakdowns. 7. As conventional treatment systems require disinfections with chlorine, it needs to be removed completely before applying on to gardens or for green belt development. Otherwise, high amount of residual chlorine may damage the plants. Also, disinfection with any disinfectant does not remove organisms, it only inactivates them. The effect depends on the amount of disinfectant used, the quality of filtration applied, the retention time available for oxidation and the existence or non-existence of other competing reaction partners (scavenging). As MBR acts like a physical barrier, it does completely remove bacteria and viruses up to a degree of 4 - 6 log removal (104 to 106 times reduction), independent of type or life form of organism. It also helps in complete retention of biomass in the aeration basin. 8. As the system has minimum units, it requires less chemical cost and power consumption when compared to conventional systems. 9. As chlorination is not required, MBR does not produce disinfection by-products or bad odors. 10.
The energy consumption of “MBR” is extremely low (0.30 kwh/m3) and the treated domestic effluents has a four
to six log (99.99%) removal of total coliform. The MBR system does not require the use of chemicals, thereby making it extremely safe during operation and re-use.
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Area requirement Approximate area required for STP will be 300 sqm. D.3.E. Storm Water Drainage System Design Criteria 1. Maximum intensity of rainfall is assumed as 50 mm/hr. 2. Average Co-efficient of Run-off is taken as 0.90. 3. Road camber is taken as 1:100 for concrete roads starting from center. 4. Surface slope as minimum 1:500.
Storm Water Disposal from Basement 1.
Down take pipes shall be provided at the upper basement levels connecting to the lower basement.
2.
A channel network will be provided at the lower basement level. All the down take pipes from the upper basement will be connected to these channels.
3.
Channels will be provided at the starting and end of the ramps so as to avoid / minimize the outside water and water along with the wheels entering the basements.
4.
Storm water sumps of suitable capacity will be provided in the lower basement in coordination with the structural consultant and architect.
5.
Mud Pumps (1-working and 1-standby) will be provided in each of the sumps with auto level controller so as to discharge the collected water to external storm water drainage system.
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Storm Water Disposal from Terraces 1.
Rain water pipes / spouts will be provided from terraces to ground level for taking out the rainwater.
2.
Slope of natural ground and infiltration capacity of open ground within the plot will not be sufficient to absorb / dispose off surface water.
3.
Looking to rain intensity in the vicinity, storm water is proposed to be disposed off through a network of channels, pipes and chambers / catch basins.
4.
The rainwater from the terraces will be disposed off through channels / pipe network.
5.
A grating at the main entrance will be provided to prevent entry of outside rainwater to the premises.
6.
Ground shall have minimum 1:500 surface slopes towards storm water collection system.
D.3.F. Rain Water Collection and Harvesting Design Criteria Broadly, there are two options for rain water harvesting: 1. 100% percolation / infiltration of the rain water to raise the sub-soil water levels and no reuse. 2. Maximum possible storage of rain water falling in the said premises and re-using the same for flushing, air-conditioning and irrigation, surplus water to be used for percolation / infiltration. The first option of 100% percolation / infiltration is possible only in the places where dry sub-soil aquifers are available so that the ground water table is recharged. This option doesn’t give the immediate benefit of water to the society, but over a period of time maintains or increases the water table of the area. Second option of storage of rain water and then re-using the same with suitable treatment is more advantageous in the present scenario where we are facing shortages of water. The stored rain water can be re-used for air-conditioning, flushing and irrigation.
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI In this case, the initial rains are allowed to drain away in the harvesting well or city drainage so as to clean the storm water network and achieve clearer and better quality of rain water for usage. Depending upon the space availability and ground water conditions, we will decide the exact system for rain water harvesting. D.3.G. Sanitary Fixtures and Water management system Fittings: Since this is a high end project, the best quality fittings as approved by architect shall be used. Water saver taps, push type fittings for basins / sinks / urinals shall be used. Flush valves with facility to adjust discharge shall be used. Water less urinals shall be used in some of the executive areas to reduce the water consumption. D.4 Water management system Materials and Finishes The following is schematic list of water management system materials, which we have considered at this stage.
Water Supply Network: Copper pipes shall be used for all internal hot and cold domestic water lines for hotel. C-PVC/PE-AL-PE pipes shall be used for all the internal flushing water supply lines. Galvanised Iron pipes shall be used for all lines in the plumbing shafts for hotel. Suitable insulation and protection will be provided to all the water supply lines at terraces and in ducts. Hot water lines will be suitably insulated to prevent heat losses. CPVC pipes will be used for supply of RO / purified water. On terrace, UV stabilized CPVC pipes will be used and proper protection will be given.
Sewerage Disposal System: Glazed stoneware pipes and RCC pipes with PCC haunch shall be used for external drainage system with proper gradient and brick masonry chambers/manholes with CI covers and steps, shall be constructed at all junctions of sewer lines and at point of change in direction of flow. For vertical soil and waste drainage lines, centrifugal cast iron pipes with drip seal / lead caulked joints shall be used. For all suspended drainage pipe lines within the building, C.I LA class pipes shall be used with proper gradient.
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI
Rain Water Disposal System: RCC pipes with PCC haunch shall be used for external storm water disposal system with proper gradient and brick masonry chambers/manholes with grating / covers and steps at all junctions of storm drain lines and at point of change in direction of flow. On driveways and landscape areas, properly designed storm water channels shall be provided as per the landscape features. For vertical rain water down take lines, centrifugal cast iron pipes with drip seal / lead caulked joints shall be used. For all suspended storm water drain pipe lines within the building, C.I LA class pipes shall be used with proper gradient.
Water Tanks / Pumps: Underground water tank will be constructed in R.C.C. with CI manholes / steps and MS ladders. All pumps will be vertical / horizontal submersible pumps with control panel and variable frequency driven.
Sanitary Fixtures / Water management system Fittings: Being a high end project, the best quality fittings as approved by architect will be used. Water saver taps, push type fittings for basins / sinks / urinals, low volume dual flush cisterns will be used to reduce water consumption. The details of other water management system materials and finishes will be worked out at the stage of finalization of the design.
PART E:- FIRE ENGINEERING AND LIFE SAFETY 1.0 Introduction
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI The following Fire Engineering Concept report has been produced by M/s. PANKAJ DHARKAR ASSOCIATES for the 5 STAR HOTEL project at Varanasi. The purpose of this report is to provide the client and the design team with an appreciation of the key fire safety provisions necessary within the building at this stage in the development’s design. This report will also subsequently be used for submission to the Chief Fire Officer (CFO) for his consideration when issuing a Final No Objection Certificate (NOC) for the project. The overall fire safety concepts for the building described within this report will deal with the means of escape strategy within the building and the interaction with the physical fire safety features proposed within the building, such as compartmentation and fire separation. In addition to these elements, the active fire safety features, such as sprinkler protection and smoke control, will be introduced along with the building’s proposed fire-fighting strategy.
1.1 Design Standards Considered for Fire Safety Systems Fire safety systems within the building will be designed to a selection of appropriate standards as indicated below: Fire Alarm System
NFPA 72, National Fire Alarm Code, 2002 Ed
Sprinkler System
As per NBC - 2005
Wet Riser System
As per NBC – 2005
Portable Fire Extinguis hers
As per NBC – 2005
Emergen cy Lighting
As per NBC – 2005
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Fire resistanc e of elements
As per NBC – 2005
Fire Service Access & Facilities
As per NBC – 2005
Firefighting Lifts
As per NBC – 2005
Car Park Ventilatio n
As per NBC - 2005
The basic parameters for the fire safety design of 5 STAR HOTEL will be therefore be the following local fire safety codes; •
National Building Code of India Part IV Fire & Life Safety 2005 1.2 Building Classification In accordance with NBC - 2005 5 STAR HOTEL will be classified as Group A6.
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 2.0 Means of Escape 2.1 Emergency Egress Philosophy The evacuation strategy for the building will be based upon minimizing disruption to occupants in the event of a small fire incident, or a false alarm, while efficiently evacuating those people who may be in direct danger from the effects of a fire. 2.2 Staircases As per NBC – 2005, the escape stairs provided throughout the building will be a minimum of 1.5m each in width. All stairs serving the basement car park will also be a minimum width of 1.5m. No exit shall be less than 1000mm except in assembly areas where this is increased to 2000mm Number of Occupants per ‘Unit Exit Width’ Stairway Door s Ramps s Residential (Group A)
25
50
75
Mercantile (Group F)
50
60
75
Assembly (Group D)
40
50
60
Car Park (Group H)
50
60
75
Occupants per Unit Exit Width for Stairs, Ramps & Doors to be applied to 60
5 STAR HOTEL DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI All stairs will be physically separated at ground floor level such that each stair is provided with two exits (one from the above ground floor and one from below). 2.3 Basement Car Park Escape Escape from the basement car park will be via fire protected stairs which will discharge direct to outside at ground floor level. All basement stairs will be provided with protected lobbies with 1 hour fire resisting doors. To enable the basement travel distances to be achieved, more than one entry point into a protected lobby to an escape stair may be created. As such, the minimum width of stairs serving the basement car park will be 1.5m. Note: As the car park is sprinkler protected, NBC permits the car park ramps to be considered part of the escape from the car park levels - as such, if required, this approach will be adopted if considered appropriate. 2.4 Compartmentation & Structural Fire Protection 2.4.1 Structural Fire Protection Fire Resistance Rating (hours)
Element External Load Bearing Walls Supporting more than one floor, columns, or other walls Supporting one floor only Supporting a roof only Internal Load Bearing Walls Supporting more than one floor, columns, or other bearing walls
61
3 3 3 3 DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Supporting one floor only Supporting roofs only
2 2
Columns Supporting more than one floor, columns, or other bearing walls Supporting one floor only Supporting roofs only
3 2 2
Beams, Slabs, Plate Girders, Trusses, and Arches Supporting more than one floor, columns, or other bearing walls Supporting one floor only Supporting roofs only Floors Roofs Interior Non-bearing Walls Top Spire Fire Refuge Areas (Walls) Staircases Walls Ceilings Corridor Walls Lift Enclosure (Walls) Compartment Walls Service Ducts/Risers & Lift Machine Rooms Transformer, Switchgear & Generator Rooms (Walls) AHU Rooms
3 2 2 2 1 0 0 2 3 2 1 2 2 2 4 1
Table for Fire Resistance Rating of Structural Members & Other Elements of Construction
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI
2.4.2 Building Materials Load bearing elements of construction, and elements of construction for which the required fire resistance is 1 hour or more, will be of non-combustible material. Stairways and corridors will not contain any combustible material. 2.4.3 Fire Doors The following fire resistance periods for doors will be applied within the Building. Door Location
Fire Resistance Rating (hours)
Staircase, protected lobby & refuge doors
2 hours
Corridors doors
2 hours
Lift Enclosures
Landing Doors Car Doors Baseme nt Doors
1 hour 1 hour 2 hours
Service Ducts/Risers Doors
2 hours
Transformer, Switchgear & Generator Room Doors
2 hours
Doors to AHU Rooms
1 hour
Guest Room Doors
1 hour
Table for Summary of Door Fire Resistances 63
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI
2.4.4 Façade Design In order to limit the potential for fire spread floor-to-floor via the exterior of the building, the minimum distance between the top of the opening on a lower floor and the sill of that on the floor above shall be 0.9m so that the fire would have to travel at least 0.9m between storeys. The fire resistance rating of any such construction will be a minimum of 1 hour.
Figure shows Location of Areas of Fire Resistant Façade Required to Prevent External Fire Spread The requirement highlighted above is only taken to apply to the building’s external envelope and not within the central atrium space which passes through the building’s hotel portion. The atrium space will be glazed floor to ceiling however any areas of fire load (ie. the contents of the hotel bedrooms) are contained behind a 1 hour fire rated corridor and therefore direct flame impingement (and hence fire spread floor-to-floor) via the atrium will not occur. 2.4.5 Staircase Enclosure Protection
64
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI The internal enclosing walls of staircases shall be of brick or RCC construction with a minimum fire resistance of 3 hours. All enclosed stairs shall be accessed via a lobby with both doors (lobby & stair door) having a minimum fire resistance of 30 minutes. Staircases will be mechanically pressurised throughout in according to NBC. 2.4.6 Lift Shaft Enclosure Protection The walls enclosing the lift shafts shall have a minimum fire resistance of 2 hours. Shafts shall have permanent vents at the top of 0.2m2 minimum free area. have a minimum fire resistance of 1/2 hour. The maximum number of lifts in one bank shall be four. The shaft for the fire lift in a lift bank shall be separated from the adjacent lifts by brick masonry or RCC with a minimum fire resistance of 2 hours. The lift machine room shall be separate from the shaft and shall not contain any other machinery. Where lifts communicate between the above and below ground levels (ie. basement), the lift lobby at each basement level will be pressurised and provided with fire doors able to achieve 2 hours fire resistance. These doors may be kept in the open position by an electro-magnetic device linked with the smoke detection system. 2.5 Fire Safety Systems 2.5.1 Sprinkler Protection The building will be protected throughout (inc. basement levels) by an approved and supervised automatic sprinkler system, to be designed and installed in accordance with NBC – 2005 norms. As per NBC – 2005 the under ground water tank for Hydrant & Sprinkler System shall be provided. A Siamese connection will be provided near all Fire Department vehicle set down areas.
65
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Rooms containing other types electrical equipment should be sprinkler protected or provided with an alternative fire suppression system. Such alternative fire suppression systems should be installed in accordance with the appropriate standard, as listed below.
Fire Suppression System
Installatio n Standard
Low, medium, and high expansion foam systems
NFPA 11
Carbon dioxide systems
NFPA 12
Water spray fixed systems
NFPA 15
Deluge foam-water sprinkler systems
NFPA 16
Dry chemical systems
NFPA 17
Wet chemical systems
NFPA 17A
Water mist systems
NFPA 750
Table for Design standards for various fire suppression systems 2.5.2 External Fire Hydrants A private ring main, with fire hydrants, will be provided in the area immediately surrounding the building for use by the Fire Service upon their attendance at an incident. 66
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 2.5.3 Internal Fire mains (Standpipe System) Internal fire mains will be provided within the building to assist in fire-fighting operations for both the above and below ground floors (ie. from the lowest to the highest storey within the building). The system will be provided as per NBC – 2005. The system will be provided with outlets within every escape stair enclosure (or protected lobby associated with each escape stair enclosure). Additional outlets will be provided where the most remote portion of a floor or storey is more than 60m, measured along a route suitable for laying hose, from a hose connection point. The fire protection system for the internal part of the building will be supplied by three fire pumps (2 x electrical and 1 x Diesel) drawing from a dedicated water storage tank with an effective water capacity to supply the fire systems. Pumps requirement as per NBC - 2005. For Wet Riser and, Hose Systems (Hydrant System) & Sprinkler System AS per NBC – 2005 Electric motor driven main fire pump set (hydrant) complete, 2850 lpm with 75KW Motor Electric motor driven main fire pump set (sprinkler) complete, 2850 lpm with 75KW Motor Diesel engine driven standby pump set (common) complete, 2850 lpm with 93BHP Engine Electric motor driven jockey pump set (common) complete, 180 lpm with 11KW Motor
Water Storage tank The Minimum water storage required for Fire Protection System as per NBC – 2005 is 2,00,000 liters under ground tank and 20,000 liters over head tank. 2.5.4 Hose Reel System A hose reel system will be installed within the building such that every part of the floor area is within 30 meters of a hose reel. The hose reels will be provided within either the protected stair enclosure, or the associated protected 67
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI lobby, within a recessed area such that its presence does not reduce the effective width of the escape route. The provision of a hose reel system within the building is predominately for use by the building's occupants (prior to fire brigade arrival) and not for use by fire-fighters who will use their own hoses/equipment and the wet rising main provided in the fire-fighting lobby.
2.5.5 Fire Extinguishers Portable fire extinguishers are to be provided throughout all areas of the buildings in accordance to NBC – 2005. 2.5.6 Fire Alarm & Detection All parts of the building will be provided with a fully addressable automatic fire detection system and an emergency voice alarm/communication system or evacuation sounders as appropriate. The design, installation and testing of the system should be in accordance with NFPA. The system will be designed to sound the alarm on the floors that require evacuation. 2.5.7 Backup Power Supplies An alternative source of LV/HV power will be provided from either two separate sub-stations or a diesel generator of adequate capacity for all necessary life safety & fire-fighting systems. 2.6 Smoke Ventilation & Control 2.6.1 On Floor Smoke Ventilation (floors above ground) Each storey of the building, above ground level, will either be provided with;
68
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Openable external windows with a total minimum free area of 2.5% of the floor area at that level, with the windows distributed as evenly as reasonable possible to promote cross ventilation of the floors; OR A mechanical smoke clearance system designed to achieve an equivalent level of safety (in this instance extract is required from the fire floor, or apartment of fire origin, only and not all floors/all apartments simultaneously). 2.6.2 Basement Ventilation In order to provide a smoke free environment within the basement level, thereby enabling attending fire-fighters to locate and deal with a incident in a short a time as possible, basement level requires to be provided with adequate smoke ventilation. In accordance to NBC basement level should be provided with a mechanical ventilation system capable of achieving 15 a/c hr in ‘normal mode’ increasing to 30 a/c hr in ‘fire mode’. In addition to the mechanical ventilation described above, also requires that natural ventilation be provided from each level via smoke outlets around the building’s perimeter.
Various types of CO/multi gas type detectors covering the entire basement will be integrated into the impulse ventilation system. 2.6.3 Smoke Ventilation to Lifts
69
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI All lift shafts will be provided with permanent vents at the head with a minimum clear area of 0.2m2 and will open into pressurised lobbies. Lift lobbies internal to the building (both above and below ground) will be provided with a pressurisation system operated automatically on fire detection (lobbies only pressurised on floor of fire origin).
2.7 Fire Service Access & Facilities 2.7.1 Fire Fighting Philosophy The philosophy to be adopted for fire-fighting within the building will be such that sufficient internal provisions are included within the design in order that a ‘relatively’ safe environment within the building can be created, in an area located near the floor of fire origin, such that fire-fighting activities can all take place internally and that external fire-fighting is not considered necessary. 2.7.2 Perimeter/External Access The building requires an open space/courtyard be provided around the entire perimeter of the building, a minimum of 6m on either side, to allow sufficient Fire Service vehicle access to the building. The necessity for vehicle access round all sides of the building is based upon the presumption that the Fire Service expect to be able to fight a fire from outside the building as well as internally. However, the fighting strategy for the Building is that ALL fire-fighting will occur from within the building (ie. from the fire-fighting shaft using the wet rising mains etc.). This is the preferred strategy as it is consistent for ALL fire locations within the building. Where access to the site for the Fire Service is provided, the minimum width of any gate will be 6m and any entrance canopy/archway will be a minimum of 4.5m in height. The open space at the entrance to the building will be paved up to a minimum of 6m from the building and the paving will be capable to supporting the weight of the a
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DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Fire Appliances up to 48 metric tonnes with a point load of 10kgs. Per cm2. The paved space will be free of obstructions and motorable. Exit Signs Self illuminating, electrically operated, exit signs will be provided on all floors and in the basements indicating the direction of escape.
Emergency Lighting Emergency lighting will be provided throughout the building in accordance with NBC. The lighting will be powered from a source independent on that for the building’s normal lighting capable of continuous operation for a minimum duration of 90 minutes. The lighting will be positioned such that it clearly indicates all escape routes within the building to allow the safe movement of people in an emergency as well as providing illumination to all appropriate fire safety equipment. Emergency lighting will be sited to cover the following locations; Near each intersection of corridors, At each exit door Near each change in direction of escape route Near each staircase so that each flight of the stairs receives direct light Near any change in floor level
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DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Outside each final exit Near each fire alarm call point or emergency communication device Near any fire-fighting equipment (eg. fire extinguishers/hoes reels etc.) To illuminate exit signage Note: ‘Near’ is taken to be within 2m (measured horizontally) The horizontal luminance at floor level on the centreline of an escape route will be at least 10 lux. For escape routes up to 2m in width, 50% of the route will be lit to a minimum of 5 lux. Fire Stop Systems The following areas / services to be minimally provided the passive fire protection system. The cable ducts shall be sealed at every floor with non combustible materials having the same fire resistances the fire eating of the duct. The removable cover in the floors and the access panels shall be of the same strength of the fire rating as the floor and walls. Every vertical openings between the floors of a building shall be suitably enclosed or protected as necessary to provide reasonable safety to the occupants while using the means of egress by preventing spreads of fire , smoke, or flames through vertical openings from floor, thus allowing occupants to complete their safe use of the means of egress.
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DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI
- ANALOGUE ADDRESSABLE FIRE DETECTION AND ALARM SYSTEM1.0 Design Basis Design Standard
:
National Building Code of India / NFPA 72
Approvals
:
All major equipments shall be approved by UL / FM / Equivalent
Type of Occupancy
:
Five Star Deluxe classification A6 as per NBC
Systems required
:
Automatic and manually operated Fire alarm system
Automatic FAS using
:
Automatic spot type smoke / heat detectors, hooters / sounders
Manual FAS using
:
Manual call points, hooters / sounders
Other devices
:
Monitor modules, Control Modules, Isolators and Relays 73
DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Cables & Conduits
:
ISI marked
Car parking areas
:
Spot type Heat detectors with Manual call points & sounders
Guest rooms
:
Multi criteria Detectors
Corridors
:
Multi criteria Detectors Manual call points & Sounders
AHUs
:
Duct smoke detectors
Electrical rooms
:
Spot type Photo-electric smoke detectors
Mechanical rooms
:
Spot type Photo-electric smoke detectors
Oil handling areas
:
Spot type Heat detectors
1.1 Selection criteria
Area above False Ceiling
: Spot type Smoke detectors (if height is more than 800mm and hazardous)
Restaurants
:
Multi Criteria detectors
Kitchens
:
Spot type Heat detectors
Controls
:
Control modules for Lift control, AHU control and Door control
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 1.2 System Description Analogue addressable fire detection and alarm system is proposed for this project. The fire alarm system Main control panel shall be micro processor based and acts as the brain of the system. This control panel shall be connected to various input devices like automatic spot type smoke detectors and heat detectors by the Initiating Device Circuits (IDC). The addressable call points, monitor modules (which are used to connect conventional switching devices to addressable loop) and control modules (which are used to connect actuation devices like small relays to addressable loop) are also connected in the same IDC. Each IDC can be connected with 99 automatic spot type addressable detectors and 99 modules. The control panel shall also be connected to various output devices like electronic hooters, sounders and flashers / strobes by Notification Appliance Circuits (NAC). The conventional devices can be connected through control modules. The number of devices is based on the current consumption. Loop powered sounders / sounder bases are connected in the IDC itself. Power supply requirement for output devices shall be calculated. Monitor modules are used to connect conventional switches like Fire protection system flow switches, Valve tamper switches, Pressure switches, Level switches and other monitoring devices. Control modules are used to connect conventional horns / strobes, Elevator recall control and relays, Magnetic door lock release control, Air circulation system control, smoke and fire damper controls. Isolators (or) isolator bases are used to isolate a section of devices in case of fault, to avoid isolation of entire loop or panel. The detectors and devices in the remaining sections will continue to function even in case of isolation of one or more such sections. All wiring shall be completely supervised. The panel shall also be networkable and interconnection to control panel by others shall be done with the provision of suitable modules as required. The system to supervise fire detection and notification system, microprocessor based operating system having the following; capabilities, features and capacities:
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DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 1.3 Fire Alarm Detection Alarms generation in case of fire Notification based on requirements Building Evacuation. Fire alarm panel to have inbuilt voice evacuation system to safe evacuation of Guests & staff of hotels. Fire alarm panel to have networking capability for expansion purpose. Fire alarm panel to have capability of integration with 3rd party BMS. Fire alarm to have auto dial up facility for reporting alarms. 1.4 Fire alarm to have following functionality: System Operation: Activation of any system fire, security, supervisory, trouble, or status initiating device shall cause the following actions and indications at all network displays with basic graphics and multiple detail screens. Sound an audible alarm and display a custom screen/message defining the building in alarm and the specific alarm point initiating the alarm in a graphic display. The display shall provide standard NFPA graphical symbols indicating hazardous materials and personnel situations critical to situation management. Hazmat Icons must conform to NFPA standard 170 formats. The system should have auto dialer unit to inform fire station in case of any alarm. System should have display capacity to provide information related to particular alarm condition. Fire alarm panel should have two level of escalation. If any alarm condition is initiated, local alarm to panels and low tone warning alarm should be broadcast to BOH area. After conformation of alarm or unattended alarm for defined duration, alarm should sound at higher volume level and broadcast evacuation messages for occupant’s safety.
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DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI System should be password protected to avoid unauthorized access to panel for acknowledgement, re-set etc. 1.5 Design Parameters for Fire Detection and Alarm System: The fire alarm should have inbuilt voice evacuation system. The system should be intelligent, addressable, self-diagnostic, and shall generate automatic reports based on requirements. The zoning will be done based on several aspects mentioned below: For each guest room. Public area or common area like Food outlet, etc. Staircase area. Kitchen and other utilities or back house level of requirement. Control rooms like plant room should also be notified for zones. Service area and service room. Trouble Condition: Display at the local fire alarm control panel graphic LCD display, the origin of the trouble condition report. Activate trouble audible and visual signals at the control panel and as indicated on the drawings. Audible signals shall be silenced from the fire alarm control panel by a trouble acknowledge switch. Trouble reports for primary system power failure to the master control shall be optionally delayed for a period of time not greater than 200 seconds. Trouble conditions that have been restored to normal shall be automatically
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DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI removed from the trouble display queue and nor require operator intervention. selectable and shall not preclude the logging of trouble events to the historical file.
This feature shall be software
Security Condition: The Local Fire Panel shall be “UL” listed for safety purposes. Vendors should also provide reference of installed site database. Fire Alarm System should minimally provide: Individual alarm zone is required along with LCD display for indication of device details and other required information. System should be capable enough to ascertain its device status and conditions. Panel should also provide indication if there is any trouble or fault in any devices. Addressable input circuits for monitoring purpose. Addressable output circuits for monitoring and controlling purpose. Audio and Visual alarm at the panel. System should also trigger commands to sprinkler system in case of fire. System shall have capabilities for live voice evacuation. Live voice instruction shall override preset alarm messages. System should be capable enough to position fire dampers in mentioned area. Amplifiers and Zone switches based on system requirement. System should have capacity to expand to other sub panels. Override of background music system during message transmittal. Automatic elevator retrieval during alarm conditions.
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DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Equipment Requirements: Smoke and Heat Detectors: At least it should comply with LPCB/NFPA/UL requirements, addressable, self-diagnostic, system line powered, photoelectric with LED for status indicator like normal operation, alarm and trouble. Detectors provided in Guest rooms should have audible base for alarm conditions. The smoke detector shall be an intelligent digital multi criteria detector. Detectors shall be listed for use as open area protective coverage, in duct installation and sampling assembly installation and shall be insensitive to air velocity changes. The detector communications shall allow the detector to provide alarm input to the system and alarm output from the system within four (4) seconds.
Manual Call Point: Manual call stations should be provided in all emergency exit routes. Other station should be located in required exit areas of room, area or buildings. Manual stations shall contain the intelligence for reporting address, identity, alarm and trouble to the fire alarm control panel. The manual station communications shall allow the station to provide alarm input to the system and alarm output from the system. The manual station shall be equipped with terminal strip and pressure style screw terminals for the connection of field wiring. Surface mounted stations where indicated on the drawings shall be mounted using a manufacturer's prescribed matching red enamel outlet box. Audio / Visual Sounders for warning conditions:
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DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI The Horn or horn/strobe appliance as indicated on the drawings shall be a synchronized temporal horn with a synchronized strobe light with multiple candela taps to meet the intended application. The appliance shall be red or white as indicated on the drawings. The strobe light taps shall be adjustable for 15/75, 30/75, 75, and 110 candelas. The appliance shall be red for wall mounted and white for ceiling mounted. Ceiling mounted appliances shall be rated for that application. Alarm sounding devices should have various options for high or low dB of output. Provided speakers should produce minimum of 77dB of outputs. Internal and external areas should have difference of 15dB sound level to convey clear alarm message. Installation of these devices should be done common areas, corridors, kitchen, food lounge, specialty rooms, parking and other areas. Each guest room, should have minimally of 60dB output sounder or audible device for warning.
Power Supply and Battery Requirement: Battery supply should be provided with panel such that it should allow 2 hours of minimum passive state and 30 minutes in alarm mode. Building Evacuation Requirements: In case of alarm, automatic evacuation message should be broadcasted to defined areas of the building. With prior permission, this system may be incorporated with background music system. Speakers and Amplifiers ratings should also take in the account while designing system. Background music should be override when any incident occurs. System should be capable enough to select any zone and/or group of zones based on Zone selection switch.
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DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Live evacuation messages facility should be provided. This paging will override all other messages. System should have capability to give pre alarm notification. Alarms tones should be followed by evacuation messages. The message shall advice all building occupants to leave building immediately in orderly manner. Customized messages should also be possible to broadcast. The sequence should be repeated after regular interval till system has been reset. Emergency evacuation and voice system should have amplification capacity of extra 25% in each channel. 1.6 Major Item List 1. Main Fire alarm control panel Analog addressable, networkable, capacity with battery & charger, Printer 2. Automatic spot type Analogue addressable Multi criteria detector 3. Automatic spot type Analogue addressable heat detector 4. Addressable Manual call points 5. Electronic Hooters 6. Flashers / strobes 7. Monitor modules 8. Control modules 9. Remote response indicators 10. Short Circuit Isolators 11. Duct detectors 12. Repeater panel 13. PC workstation with software for display and control of system devices
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI
- CCTV AND ACCESS CONTROL SYSTEMS -
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI 1.0 General Description: The Integrated Access Control System’s (ACS) primary function should be to regulate access through specific doors, gates or barriers to secured areas of the facility. The objective is to provide overall building security and authorization of defined areas. Our goal is to provide reliable and highly secure infrastructure required to enhance the communications experience of staff and guests. 1.1Purpose behind Security Systems: To control and restrict unauthorized entry to guest and staff employee. To maintain records of movement of every employee. For continuous surveillance of desired areas. Video recordings often provide indisputable evidence in court in case of theft, employee pilferage or forced entry. A system, which will acts as repellent for prospective intruders. 1.2 Design Requirements: Security system should be PC based for perimeter protection, access control and closed circuit television monitoring integrated with various type of sensors, fulfilling the operational need for security. A world class secure infrastructure based on highly resilient Security system. The nature and extent of the security systems should cover all areas of building including perimeter, interior, common areas like parking etc. Perimeter protection system will take care of walls, fences, and gateways. To provide access control based security for authorization of different access points and closed circuit television monitoring for surveillance purpose. All security system should be provided with emergency power backup for 2 hours. Centralized monitoring and controlling from the main security center. Cameras to connect on IP network as shown below. All these IP connected cameras will be connected to PC via WAN or video matrix.
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI Closed circuit television should provide full coverage for all desired and required areas. It should be interfaced to allow programmable control for constant monitoring, motion based monitoring etc. Location of CCTV should be strategic so it also prevents loss prevention. The following mention areas should minimum covered by CCTV: Back of House. Public Areas. Food and beverage storing areas. Main reception and common seating areas. Cashiers office and safe area. Employee entry and exits. Parking areas. Public areas like corridors, lift, library etc. External cameras should have weatherproof housing for protection. Lighting requirement to various locations also to be considered for camera design. Interior cameras should provide clear images under normal lighting conditions. CCTV function should be controllable from one central location. To view images one color monitor of proper screen size should be provided. Motion detection is required to save images only if undefined motion has appeared in screen. The access control system should be microprocessor based. Authorized person will hold the card, upon presenting this card; door will allow access to the particular door. The system will take note of entry and exit of each entry. Also Controlled Access Parking is required to enter and exit to parking areas.
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DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI In case of fire, all doors should be unlock or lock depending on area requirement. Fire exit doors should remain in latched position with electrical power. Power cut will make these doors unlatched. All doors should be centrally controllable and programmable depending on requirement. The main security center will have both access and closed circuit television monitoring system installed. Depending upon building area requirement arming/disarming of the doors as well as camera should be possible. This security cabin/center will also have other life safety systems such as fire detection, Utility systems like building management system or any other utilities, which provides coverage to building property. 1.3 Perimeter Protection System: In perimeter protection, any intrusion attempt is immediately identified by real time presentation of alarms and video picture by automatic “Pre-Set” PTZ – synchronized camera movement. Walls should be provided full security coverage.Gateways should be provided at locations determined by security in charge. Lighting should also be provided in apparent manner, or where requirements allows. 1.4 Vehicle Monitoring System: In lieu of increasing terrorist attack threat, Hotel industry today requires vehicle-scanning system. The building must have to protect from unwanted and hazardous materials in the building area. Scanner will scan and records the underside of vehicle in building entry with high-resolution images. Underside vehicle images can be “matched” with color vehicle photos and license plates for image control, audit and security.
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DESIGN CONCEPT REPORT M.E.P. SERVICES
DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI All data imagery should be archived for operator retrieval and analysis by license plate number. Images then should be reviewed with for extensive inspection and control purpose. System should match the underside of the vehicle to confirm access by comparing the underside of the current vehicle with the previously saved image. Electrically operated barriers should be deployed at entry to have initial point of access to the building.
- INTEGRATED BUILDING MANAGEMENT It is envisaged to provide a state of the art Building Management System for the services and utilities being supplied in the building in order to ensure: Thermal comfort for the customer. Security & Safety comfort for the customer. Technical comfort for the customer and the hotel maintenance team Cost reduction for the hotel manager Energy optimization. The primary services considered under the ambit of Integrated Building Automation shall be monitored and controlled centrally. The operating philosophy for these services shall be primarily focusing on energy optimization – especially considering that the facility is looking for green building certification; the Integrated BMS Solution proposed shall be designed for following systems:
Chiller plant Monitoring and Control. Pumping System Monitoring and Control TFA / Common area AHU monitoring & control.
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DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI
Ventilation system Monitoring and Control. Guest Room HVAC monitoring (If required). Energy monitoring & auditing.
Soft /Hard wired Integration of other mechanical / Electrical utilities. Intelligent Lighting systems for Apartment and Hotel Fire Alarm System & Evacuation system Integration for alarms. Lift status monitoring. Kitchen refrigeration system. Maintaining Indoor air quality. Monitoring and control via Internet & Intranet. Data exchange to Property Management Systems. 1.0 Building Management 1.1 BMS workstation: Building automation system to monitor & control utilities from the BMS work stations from Engineering office / Communication room & Security office. The BMS work stations to connect to standalone freely configurable DDC controllers. BMS network shall allow peer-to-peer communication. Building Automation system should have bidirectional capability with following open standards:
BACnet. LOnmark. EIB. OPC. BMS workstation must provide bi-directional data communication & control via real time data exchange. BMS workstation to transfer energy consumption related data to 3rd party maintenance software.
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DESIGN BRIEF ON MEP SERVICES FOR UPCOMING 5 STAR HOTEL AT VARANASI
BMS workstation shall have minimum following features:
Color graphical floor plan & schematics display for mechanical / electrical systems. Protected Access. Shall have capability of monitoring & controlling via Internet / intranet. Alarm management & routing via e-mail / SMS / Fax. Shall have capability of online & offline trending of data points. BMS workstation to schedule systematic preventative maintenance of all mechanical / electrical equipments. 1.2 DDC controllers: DDC controllers shall have following features:
Must support open protocol communication (Bacnet / Lonmark) Must support “Peer to Peer” communication between controllers. Shall be latest offering of manufacturer’s range. Shall have inbuilt memory to store programs & data. Shall have Inbuilt Real time clock. Shall have inbuilt logic blocks to support control logic.
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