Heating, Ventilation & Air Conditioning Modelling
TM-1103
TRAINING GUIDE
AVEVA Plant (12 Series)
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling TM-1103
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling TM-1103
Revision Log Date 06/12/2007 08/05/2008 20/05/2008
Revision 0.1 0.2 1.0
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling TM-1103
Copyright Copyright and all other intellectual property rights in this manual and the associated software, and every part of it (including source code, object code, any data contained in it, the manual and any other documentation supplied with it) belongs to AVEVA Solutions Ltd. or its subsidiaries. All other rights are reserved to AVEVA Solutions Ltd and its subsidiaries. The information contained in this document is commercially sensitive, and shall not be copied, reproduced, stored in a retrieval system, or transmitted without the prior written permission of AVEVA Solutions Limited. Where such permission is granted, it expressly requires that this Disclaimer and Copyright notice is prominently displayed at the beginning of every copy that is made. The manual and associated documentation may not be adapted, reproduced, or copied in any material or electronic form without the prior written permission of AVEVA Solutions Ltd. The user may also not reverse engineer, decompile, copy or adapt the associated software. Neither the whole nor part of the product described in this publication may be incorporated into any third-party software, product, machine or system without the prior written permission of AVEVA Solutions Limited or save as permitted by law. Any such unauthorised action is strictly prohibited and may give rise to civil liabilities and criminal prosecution.
The AVEVA products described in this guide are to be installed and operated strictly in accordance with the terms and conditions of the respective licence agreements, and in accordance with the relevant User Documentation. Unauthorised or unlicensed use of the product is strictly prohibited.
Printed by AVEVA Solutions on 22 May 2008 © AVEVA Solutions and its subsidiaries 2001 – 2007 AVEVA Solutions Ltd, High Cross, Madingley Road, Cambridge, CB3 0HB, United Kingdom.
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Contents 1
2 3 4 5
6
7
8
9
Introduction .............................................................................................................................................. 7 1.1 Aim .................................................................................................................................................... 7 1.2 Objectives ......................................................................................................................................... 7 1.3 Prerequisites .................................................................................................................................... 7 1.4 Course Structure.............................................................................................................................. 7 1.5 Using this guide ............................................................................................................................... 7 HVAC Design Features............................................................................................................................ 9 Getting started ....................................................................................................................................... 10 3.1 Entering a Design Session (Exercise begins)............................................................................. 10 Learning about the PDMS database hierarchy ................................................................................... 11 4.1 How PDMS stores design data. .................................................................................................... 11 Routing a sequence of HVAC Components........................................................................................ 12 5.1 HVAC Components representation in the catalogue ................................................................. 12 5.1.1 HVAC physical shape .............................................................................................................. 12 5.1.2 HVAC variables ........................................................................................................................ 12 5.2 Setting HVAC defaults................................................................................................................... 13 5.2.1 Setting a default HVAC specification ....................................................................................... 13 5.2.2 Choosing the HVAC form format.............................................................................................. 13 5.2.3 Customising HVAC forms ........................................................................................................ 14 5.3 Creating HVAC Administrative elements .................................................................................... 15 5.3.1 Creating a HVAC System element........................................................................................... 15 5.3.2 Creating an HVAC Branch element ......................................................................................... 16 5.4 Creating HVAC Components ........................................................................................................ 17 5.4.1 Creating a Fire Damper............................................................................................................ 20 5.4.2 Moving the Fire Damper........................................................................................................... 21 5.4.3 Creating a composite component ............................................................................................ 22 5.5 Adding more HVAC components to your Ductwork .................................................................. 23 5.5.1 Creating a rectangular radiused bend...................................................................................... 23 5.5.2 Repositioning the rectangular radiused bend .......................................................................... 23 5.5.3 Creating a rectangular mitred offset......................................................................................... 23 5.5.4 Creating a second rectangular radiused bend ......................................................................... 24 5.5.5 Adding a circular section silencer............................................................................................. 25 5.5.6 Adding a three-way component and terminating the branch ................................................... 26 5.5.7 Defining the branch tail ............................................................................................................ 29 Adding to the HVAC Model ................................................................................................................... 30 6.1 The Grid / Tiling utility ................................................................................................................... 30 6.2 Creating side branches ................................................................................................................. 32 HVAC Splitting ....................................................................................................................................... 39 7.1 Overview ......................................................................................................................................... 39 7.2 The Split HVAC Form..................................................................................................................... 40 7.2.1 Branches to Split ...................................................................................................................... 40 7.2.2 Split Markers ............................................................................................................................ 41 7.2.3 Split .......................................................................................................................................... 42 Completing the Design.......................................................................................................................... 45 8.1 Filling ductwork gaps automatically ............................................................................................ 45 8.2 Adding Stiffening Flanges ............................................................................................................ 47 8.3 Automatic item numbering and naming ...................................................................................... 48 8.4 Finishing off design details .......................................................................................................... 48 8.4.1 Modifying joint types................................................................................................................. 49 8.4.2 Inserting an access panel ........................................................................................................ 49 8.5 Changing the view representation ............................................................................................... 50 Checking and Outputting Design Data ................................................................................................ 51 9.1 Querying data settings .................................................................................................................. 51 9.2 Checking for design data inconsistencies.................................................................................. 52 9.3 Data check functions..................................................................................................................... 52 9.4 Data Checker Utility ....................................................................................................................... 53 9.4.1 Insulation Check....................................................................................................................... 53 www.aveva.com 9.4.2 Length Check ........................................................................................................................... 54 5
AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling TM-1103 9.4.3 Branches Fit on main Check .................................................................................................... 56 9.5 Generating a data output report ................................................................................................... 57 9.5.1 Generating a tabulated data report .......................................................................................... 57 10 HVAC Items System Attribute .......................................................................................................... 59 10.1 Creating / Modifying System Hierarchy....................................................................................... 59 11 HVAC Spooling .................................................................................................................................. 61 11.1 Generating HVAC Spools using the HVAC Spool Manager ...................................................... 61 11.2 HVAC Spool Verification ............................................................................................................... 62 11.3 Modifying an HVAC Spool............................................................................................................. 62 12 HVAC Sketches .................................................................................................................................. 64 12.1 HVAC Sketch Production .............................................................................................................. 64
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CHAPTER 1
1
1.1
Introduction
Aim
During the course participants will learn the basic functions required to design, create and modify HVAC elements, and HVAC reporting.
1.2
Objectives
1.3
To have a clear understanding of the basic features of AVEVA Plant HVAC Design. To familiarise users with the screen layout and the workings of the user interface. To create and manipulate HVAC administrative elements To discover how to create a sequence of HVAC components To understand how to modify existing HVAC components. To understand how to use the Grid / Tiling Utility. To be able to make Data Consistency checks To discover how to Split HVAC elements and to generate HVAC spools. To be able create HVAC sketches.
Prerequisites
Trainees should have attended the AVEVA Plant PDMS Foundations course and be familiar with Microsoft Windows
1.4
Course Structure
Training will consist of oral and visual presentations, demonstrations and set exercises. Each workstation will have a training project, populated with model objects. This will be used by the trainees to practice their methods, and complete the set exercises.
1.5
Using this guide
Certain text styles are used to indicate special situations throughout this document, here is a summary; Menu pull downs and button press actions. Are indicated by bold dark turquoise text. Information the user has to Key-in will be in bold red text. Annotation for trainees benefit
L
Additional information
Refer to other documentation
System prompts should be bold and italic in inverted commas i.e. 'Choose function' Example files or inputs will be in the courier new font, colours and styles used as before.www.aveva.com 7
AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling TM-1103
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CHAPTER 2
2
HVAC Design Features
AVEVA Plant HVAC has been designed by HVAC Engineers for HVAC Engineers. The HVAC application offers the following key benefits.
The HVAC Designer application lets you build up and detail complex ducting networks simply by selecting components from standard catalogues. By using standard default settings, a conceptual layout can be created and analysed rapidly, leaving the design details to a later postapproval stage.
The application provides facilities form creating rectangular, circular and oval cross-sectional items. Individual design components can be selected from over 100 parametric catalogue items covering all likely requirements, including a range of auxiliary items such as stiffening frames, access panels, splitter plates etc., all of which will be accurately detailed in the design model. The catalogue also includes a range of inline plant items such as centrifugal and axial fans, air handling units, silencers, dampers etc. each ready for insertion into the design model in a single operation.
User-definable detailing specifications, such as those for construction materials, ductwork gauge, flange dimensions etc., define precise manufacturing requirements. User-definable default settings ensure compliance with company standards and a high level of design consistency throughout the project.
Accurate geometric representation of all design items ensure reliable clash checking during the design process, leading to good space management and the early elimination of positional errors.
Explicitly positioned design components are interconnected automatically with implied ductwork as the design of the ductwork sequence is built up. An auto filling facility is provided which can then calculate the optimum use of standard ducting straights to complete the material take-off for the entire network.
Several design aids are incorporated, including a facility for creating horizontal grids which can be used to position ceiling tiles. This can greatly aid the layout of building services in an architectural environment.
HVAC elements may be named in accordance with a predefined set of rules, so that their positions in the database hierarchy are always obvious without the user having to enter specific texts during the design process.
The applications user interface can be tailored readily to suit the level of experience of any individual user. In particular, graphical illustrations of all catalogue items can be displayed if required to simplify component selection and dimensioning.
The user can carry out multi-disciplinary clash checks at any stage of the design, thus avoiding spatial conflicts within the overall model which could be expensive to rectify at the construction stage. This is particularly important where different features of the design model are under the control of different designers.
At any stage of the design process, the user can create reports listing specified data from the current database. You can specify a standard report template, so you can derive lists of commonly required information very quickly, or you can design a one-off report format to suit special needs. The resultant output, which can include data from any design discipline, sorted in any way you require, can be either displayed on your screen or sent to a file for storage and / or for printing. www.aveva.com 9
CHAPTER 3
3
Getting started
3.1
Entering a Design Session (Exercise begins)
1. To start AVEVA Plant, Select AVEVA > PDMS 12.0 > Run PDMS
2. 3. 4. 5. 6.
Enter the name of the project: Enter the Username: Enter the Password: Enter the MDB: Select the module required:
SAM HVAC HVAC HVAC DESIGN
When all the necessary details have been entered the Login form appears as shown. Click OK
When PDMS has been loaded, a default screen layout will be displayed 7. Check that the HVAC application is running. In the Title Bar of the main display, the application running will be shown. If the HVAC application is not running , then select Design > HVAC Designer
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CHAPTER 4
4
Learning about the PDMS database hierarchy
Although this guide is about the design of HVAC ducting networks, in practice you will usually route your ductwork with reference to predefined design items such as a frameworks, floors and ceilings. You will therefore learn how these other items are defined in PDMS as well as learning how to route sequences of HVAC components and ducting within them.
4.1
How PDMS stores design data.
All PDMS data is stored in the form of a hierarchy. A PDMS design database has:
A top level, World (Usually represented by the symbolic name /*) Two principle administrative sublevels, Site and Zone
The names used to identify database levels below Zone depend on the specific engineering discipline for which the data is used. For HVAC design data, the lower administrative levels (and their PDMS abbreviations) are:
HVAC (HVAC) Branch (BRAN)
Each HVAC element can represent any position of the overall ducting network. Each branch within a HVAC element represents a single sequence of components running between two, and only two points.
Branch Head Branch Tail
The data which defines the physical design of the individual HVAC components is held below Branch level.
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CHAPTER 5
5
Routing a sequence of HVAC Components
In this chapter you will learn:
5.1
More about how the design data is stored and accessed in PDMS How to route a HVAC network How to position a selection of HVAC components within the ducting runs
HVAC Components representation in the catalogue
Each HVAC component is represented in the PDMS catalogue by the following types of data:
5.1.1
Physical shape Parameters
HVAC physical shape
The Physical shape of a component is defined by a set of geometric primitives, so that a component can be manipulated and linked to adjacent HVAC items, all principle points needed to define the component position orientation and connectivity are identified by uniquely numbered tags. These tags, which have both position and direction, are called P-points:
Each P-point is identified by a number of the format P0. P1, P2 etc. P0 always represents the components origin position.
The principle inlet and outlet points are also identified as P-Arrive (PA) and P-Leave (PL). P1 is the same as P-Arrive, and P2 is the same as P-Leave. The reason for this is that the logical flow statement is not true for HVAC (only piping flow).
5.1.2
HVAC variables
The setting of all variables needed to distinguish a component from others with the same geometry and Ppoint sets are defined by parameters. The values of these are defined to suit the specific design requirements. For example, a rectangular three way component (or branch connector) might be represented in the PDMS catalogue as follows:
The two curved duct sections form the component geometry set The four P-points form its point set P-point, P3, enables you to control the direction of the branch connection arm when you incorporate the component into your design.
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling The dimensions of the component and other constructional details are represented in the catalogue by parameters whose values are set to suit the design requirements.
5.2
Setting HVAC defaults
The following defaults will need to be set for the users to complete the exercises.
5.2.1
A default detailing specification The format of the HVAC form Customised HVAC forms.
Setting a default HVAC specification
The constructional detail of components that the user selects from the HVAC catalogue is determined by the default specification, which is shown on the HVAC application menu bar. The default specification is automatically set to TUTORIAL. The current HVAC specification is displayed in the HVAC Design toolbar
The TUTORIAL specification gives access to a range of catalogue components that are suitable for use with this exercise. Although you can, select a different specification for each HVAC branch, you will use the same specification throughout this design exercise.
Exercise continues 8. Select the specification Tutorial from the HVAC Designer toolbar
5.2.2
Choosing the HVAC form format
All the principle functions for creating, positioning, orientating and connecting HVAC elements are available from within a single form, the Heating, Ventilation, Air Conditioning (HVAC) form. The HVAC form has two display formats:
The brief from, the default, uses drop-down lists to show the elements available for selection when you are creating a design
The full form uses scrollable lists to show the elements available for selection, and also offers more complex positioning options.
It is preferable to use the full form whilst learning about PDMS. This guide uses examples of the full form.
Exercise continues 9. Display the HVAC form by selecting Create > HVAC
The HVAC form is displayed in Brief format
To use the full form move the mouse over the form, now press the right mouse button and select Use Full Form
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
The full form will be displayed as shown above. The style of form can also be set by selecting: Settings>Ductwork defaults, the HVAC Defaults form is displayed as shown By selecting Style> Use Full Form, the HVAC form will be displayed as shown above. The training manual uses the brief form.
5.2.3
Customising HVAC forms
The appearance and behaviour of the forms for creating and modifying HVAC components can be customised. This enables you to modify forms to suit your preferences, or the type of design work you are doing. You will apply settings that provide you with the support you need as you learn about the HVAC application
Exercise continues 10. Select Style>Style Options from the HVAC Defaults to display the HVAC Form Style window. Alternatively, use the right mouse button whilst hovering over the HVAC creation form. For the training toggle the options as shown:
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
Show Local Views
This displays a small 3D graphical view showing the current component in its design context.
Local Views Shade
This shows local views in colour shaded as opposed to wire line representation
OK / Cancel Forms
This gives component create and modify forms Apply and Dismiss buttons instead of Ok and Cancel buttons, so that they remain available for repeated use until dismissed explicitly.
Show Pixmaps
This automatically displays diagrams showing components geometries to help you select items from the catalogue.
Show Forms
This displays the Create / Modify form automatically when you add a new component to the design, so that you can adjust the default dimensions and / or orientation as required.
Exercise continues 11. Drag the zone /HVAC-BUILDING into the graphical view and remove the roof from the display
5.3
Creating HVAC Administrative elements
You are now ready to create administrative elements which govern the position of individual HVAC components within the database hierarchy. The first elements are:
5.3.1
A HVAC system element A HVAC Branch Element (the branch head)
Creating a HVAC System element
Exercise continues 12. Make sure that the current element is ZONE /HVACZONE
13. In the HVAC form, from categories select PDMS Branches and from the available types, select HVAC System Element
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
14. In the displayed Create HVAC form, enter ‘HTESTHVAC’ in the HVAC Name text box 15. Click OK to create the element.
5.3.2
Creating an HVAC Branch element
There are two types of HVAC branch element
Main branch Side branch
These differ only in the way they are added to the design:
A main branch requires you to position and orientate its head explicitly A side branch takes its head position and orientation from a branch connection point P3 on an existing three way component.
The first HVAC branch element will be a main branch element, the branch head.
Exercise continues 16. From the HVAC form, with categories still set to PDMS Branches, select Main Branch Element from the Available Types
17. In the displayed HVAC main Branch Element form:
Enter Branch Name: ‘/HTESTB1’
Set Branch Head Shape to RECT (rectangular)
Set the Head Direction to ‘N’ (this is the direction looking along the ductwork run from the head position towards the first component).
Set the Duct width AA to ‘1000’.
Set the Duct Depth AB to ‘500’.
Set the insulation thickness to 50mm (this adds 50mm of insulation automatically to each surface of all components and ducting owned by the branch).
Select ID Design PPoint from the Head Start drop down list
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
Your last selection, ID Design PPoint, enables you to specify the position of the Branch Head by picking a p-point. You will pick the p-point at the centre of the hole on the front wall of the building 18. Leave the HVAC Main Branch Element form as it is, and go to the 3D graphical view 19. In the 3D graphical view tool bar, click
, and zoom in on the hole in the front wall of the building
20. Select Settings>Graphics from the Main Tool bar and the Graphics settings form will be displayed
Select the Plines & PPoints Tab
Toggle the Display and Numbers for PPoints to be displayed
Click Apply
The ppoints of all the elements will be displayed
Select the Representation Tab Toggle the Holes Drawn Click OK
The holes (negative volumes) of all the elements will be displayed
21. Now go back to the HVAC Main Branch Element form, and click OK A prompt is displayed ‘Identify Design Ppoint’ 22. Hold down the left mouse button and move the cursor of the ppoint at the centre of the hole, and release the mouse button over it. The Branch head is now defined 23. On the Graphics settings form toggle PPoints display and numbers to remove the ppoints from the display and click OK.
5.4
Creating HVAC Components
Starting at the branch head, you will now build up you HVAC design. You will add individual components sequentially, position and orientate each of these as you proceed. You will be creating the following HVAC configuration
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
Exercise continues 24. The first component required is a rectangular straight, to be aligned with the hole in the southernmost wall: 25. In the HVAC form, Select Rectangular from the categories list
26. In the displayed HVAC Rectangular Ductwork form, click on the Straight This displays the Rectangular Straight form, with data fields for all the parameters to define the component. The initial data settings on the component definition forms are determined by a set of default values.
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling 27. To see what the parameters mean in terms of the component geometry, click the Picture button on the form. This displays the HVAC Component form containing a dimensioned and annotated diagram showing how the component is defined in the catalogue.
Compare the data categories on the Rectangular Straight form with the diagram, to see how these are related. There is a full set of component geometry diagrams in the appendices of HVAC Design Using AVEVA Plant Volume 2 28. Close the HVAC Component form by selecting Control>Close 29. Click Ok on the Rectangular Straight form to accept the default parameters The rectangular straight is created and positioned with its p-arrive at the branch head, so that it is inside the building. (as shown in the next diagram) To move the straight to the required position, it will need to be moved south 5000mm and down 96mm.
30. Go to the POSITION: - area on the HVAC form. In the text box next to the move button, enter the displacement; ‘S5000D96’ 31. The straight is moved as soon as you press the Return button to confirm the data
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling 32. The position of the straight can be checked by selecting Query>Position>Origin from the main bar menu. The position displayed in the HVAC Command Output window, is:
33. To reposition the branch head so that it coincides with the PA of the straight, go to the drop down lists in the bottom row of the CONNECT:- area on the HVAC form:
Set HVAC Branch to Head Set to First Member
This connects and therefore repositions the head of the current branch to PA of the first component. The branch head could have been positioned here when it was first created, but this would have required the explicit coordinates to be calculated. It is usually easier, to position a new item relative to an existing design point and then move it later.
5.4.1
Creating a Fire Damper
The next step in the construction of you HVAC design is to create a fire damper at the position where the ducting will pass through the hole in the wall.
Exercise continues 34. The last operation made the branch head the current element. Each new component is created immediately after the current component in the branch list order. So to create a component after the straight, you must navigate back to the straight. To do this, select the straight component in the 3D graphical view. 35. In the HVAC form,
from categories, select Inline Plant Equipment from the available types, from the displayed HVAC Inline Plant Equipment form, select Rectangular fire Damper
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
36. On the Rectangular Fire Damper form, enter the name FD1 and leave all the other parameters the same, then click OK
5.4.2
Moving the Fire Damper
The fire damper is automatically positioned so that its PA is coincident with the PL of the preceding straight. It will now be moved so that it fits within the wall.
Exercise continues 37. In the POSITION: - area of the HVAC form, set Through to ID Element.
38. A prompt is displayed to Identify element, pick any part of the southernmost wall The fire damper is moved northward along its axis until it lies in the plane of the wall. The gap between the straight and the fire damper is filled automatically by a length of implied ducting in the 3D graphical view. Note that implied ducting is not shown as an element in the Design Explorer 39. Change the 3D graphical view direction to Plan>North, so that the view appears similar to the diagrams shown here
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
5.4.3
Creating a composite component The HVAC components that have been created so far have each been represented by a single PDMS element. Some HVAC components, (composite components) are represented by more than one PDMS element. You must be particularly careful that you are at the correct position in the Design Explorer when you refer to such a component. The next part of the exercise shows how the composite components are represented in the PDMS hierarchy.
Exercise continues 40. Use the HVAC form to create a Rectangular Square Bend
Select Rectangular from the categories on the HVAC Select Square Bend form the displayed HVAC Rectangular Ductwork form
On the displayed Rectangular Square Bend form
Set leave direction to ‘W’ Leave all other settings at their default
41. Click OK 42. A warning message is displayed stating the hierarchy has been affected by the creation of this component. Click OK on the warning message 43. The bend is created as shown: The Design Explorer shows two new elements
BEND 1 represents the bend ducting SPLR 1 represents the set of air deflectors within the bend (created because a square bend requires turning vanes)
The message displayed when creating this component was a warning that this component comprises more than one PDMS element. If you navigate to the square bend simply by picking it with the cursor, you are almost certain to elect the element representing the outer ducting. The deflector set (air turns) that also form part of the component, follows the bend in branch order (as viewed in the Design Explorer). When creating an element after the bend, you must ensure that the deflectors are the current element.
To view the deflectors inside the bend, switch the 3D graphical view temporarily to wireline mode. (Press F8 on the keyboard to toggle between colour shaded and wireline views)
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
Deflector set (SPLR1)
5.5
5.5.1
Adding more HVAC components to your Ductwork
Creating a rectangular radiused bend
Exercise continues 44. Using the design explorer, make sure that the deflector set of the rectangular square bend (SPLR 1) is the current element 45. Use the HVAC form to create a rectangular radiused bend;
Select Rectangular from the categories on the HVAC Select Radius Bend form the displayed HVAC Rectangular Ductwork form
On the displayed Rectangular Radiused Bend form
Set the inside radius to 100 Set leave direction to N All the other defaults remain the same.
46. Click OK
5.5.2
Repositioning the rectangular radiused bend
The new bend needs to be positioned in the plane of the westernmost wall
Exercise continues 47. Position the new bend in the plane of the westernmost wall by using POSITION: - Through ID Element on the HVAC form. A prompt will be displayed Identify element. Pick the beam above the westernmost wall 48. Now move the bend to fit just inside the wall, and downwards so that the ducting leaving it passes under the beam across the building roof. Go to the POSITION: - area on the HVAC form. In the text box next to the move button, enter the displacement; ‘E800D150’
5.5.3
Creating a rectangular mitred offset
Because the radiused bend has been moved downwards, its inlet (PA) is not vertically aligned with the outlet (PL) of the preceding component. This is indicated in the 3D graphical view by a broken line between the components, rather than implied ducting. To correct this problem, a mitred offset section will be inserted between the two components.
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
Exercise continues 49. Remember that a new component is always added immediately after the current element, so navigate back to the deflector set (SPLR1) of the square bend 50. Create a Rectangular mitred offset
Select Rectangular from the categories on the HVAC Select Mitred Offset form the displayed HVAC Rectangular Ductwork form
51. PDMS has a powerful facility that can calculate the length and the amount of offset needed to fit the new component automatically into the available space. Click the Fit button on the Rectangular Mitred Offset form. The calculated data is entered into the parameter data fields, then click OK
5.5.4
Creating a second rectangular radiused bend
Exercise continues 52. Navigate back to the last component in the branch, the rectangular radiused bend.
Select Rectangular from the categories on the HVAC Select Radius Bend form the displayed HVAC Rectangular Ductwork form
On the displayed Rectangular Radiused Bend form
Leave the inside radius as the default value (0.5 means 0.5 x duct width) Set leave direction to E Click OK
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
53. Position the bend in the plane of the northernmost wall by using POSITION: - Through ID Element on the HVAC form. A prompt will be displayed Identify element. Pick the beam above the northernmost wall 54. Move the bend South by 1500mm (use Move by: S1500)
5.5.5
Adding a circular section silencer
To include a circular section silencer in your rectangular ductwork, you need a transformation piece either side of the silencer.
Exercise continues 55. In the HVAC form:
From categories select Transformations, From the displayed HVAC Shape Transformation Items form, select Square to Round In the displayed Square to Round Transformation form set the duct diameter to 750 Click OK
56. Position the transformation piece 300mm after the first beam reached in the branch creation direction. Select Position>Move>clearance, the following form will be displayed
Set P1 as the reference point in the element, Set the direction as E Set the clearance to 300, Select Behind Select ID Cursor Click Apply. A prompt will be displayed Identify element. Pick the SCTN element as shown below.
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
57. In the HVAC form:
From Categories, select Inline Plant Equipment From the displayed HVAC Inline Plant Equipment form select Circular Silencer In the displayed Circular form name the component SILE1 Set the Outer Diameter to 950 Click OK
Another transformation piece will be added to revert back to the rectangular ducting. However, instead of specifying this from first principles a copy will be created of the first transformation piece and reversed to achieve the desired round to square result. 58. On the HVAC form, select the Create Copy ID button.
5.5.6
A prompt will be displayed Identify element Pick the square to round transformation that you want to copy. On the displayed Square to Round Transformation form, Set the Flip Circ / Rect option to Yes Click Apply. Click Dismiss
Adding a three-way component and terminating the branch
A three-way component enables you to connect one branch to another. You will need a three-way component so that you can connect a side branch into your existing main branch later in the exercise.
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
Exercise continues To create a three-way component 59. In the HVAC form:
From Categories, select Rectangular From the HVAC Rectangular ductwork form select Square Threeway Set Duct Width LA to 800 Set Second Width to 800 Set Leave Direction to S Click OK
A gap of 1500mm is required between the three-way component and the preceding component. The Distance operation on the HVAC form enables you to do this by allowing you to specify the gap between the PL of one component and the PA of the next, thereby avoiding the need for you to calculate the movement required to reposition it. 60. Move the threeway a distance of 1500 61. To check that the gap is correct, navigate back to the round to square transformation and select Query > Gap to next from the main menu bar
The value of the gap is displayed in the HVAC Command Output window 62. Navigate back to the square threeway component 63. Use the HVAC form to create a rectangular radiused bend;
Select Rectangular from the categories on the HVAC Select Radius Bend form the displayed HVAC Rectangular Ductwork form
On the displayed Rectangular Radiused Bend form
Set leave direction to E All the other defaults remain the same.
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
64. Click OK 65. In the 3D graphical view tool bar, click building
, and zoom in on the hole in the easternmost wall of the
66. Select Settings>Graphics from the Main Tool bar and the Graphics settings form will be displayed
Select the Plines & PPoints Tab
Toggle the Display and Numbers for PPoints to be displayed
Click Apply
The ppoints of all the components will be displayed
67. Align the bend with the hole in the easternmost wall
Using the Through ID P-Point option from the HVAC form A prompt will be displayed Identify Design ppoint
68. Hold down the left mouse button and move the cursor over the ppoint at the centre of the hole, and release the mouse button. 69. On the Graphics settings form toggle PPoints display and numbers to remove the ppoints from the display 70. Click OK 71. In the HVAC form,
From categories, select Inline Plant Equipment from the available types, From the displayed HVAC Inline Plant Equipment form, select Rectangular fire Damper
72. On the displayed Rectangular Fire Damper form
Enter the name FD2 Leave all the other parameters as the default values Click OK
73. Select Position>Move>Clearance, the following form will be displayed 74. Position the fire damper through the hole in the easternmost wall
Set P1 as the reference point in the element, Set the direction as E Set the clearance to 0 Select Behind Select ID Cursor Click Apply. A prompt will be displayed Identify element. Pick the easternmost wall
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
5.5.7
Defining the branch tail
The definition of the main branch can be completed by defining the branch tail
Exercise continues 75. Connect the Branch tail to the fire damper (the last member of the branch)
Select Tail from the HVAC Connect menu at the foot of the HVAC form Select Last member
The final configuration is as displayed below
76. Savework
Savework should be done regularly through these exercises
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CHAPTER 6
6
Adding to the HVAC Model
In the last chapter you created a sequence of components to form the main branch of your HVAC ductwork. In this chapter you will.
6.1
Learn how to position tiles using a working grid Extend your model by adding some side branches.
The Grid / Tiling utility
You begin by using some facilities for setting out a working grid and positioning ceiling tiles within it, so that you can then use these tiles as references for positioning HVAC grilles. With reference to your existing design model, the next part of the HVAC ducting network which you are going to design will feed two ceiling grilles above the small room in the northeast corner of the building. In order to position these grilles, you will use a facility which lets you set out a horizontal grid and a ceiling tile layout based on a specified datum point. There are three stages to tiling: Specify a setting out point (SOP) to represent the datum from which grid line positions are to be calculated. Create grid lines at specified intervals, referenced from the SOP in a horizontal plane. Add tiles at specified positions in the plane of the grid.
Exercise continues 77. Navigate to the zone HVAC-BUILDING. The grid / tiles are created below this hierarchic level. 78. From the main menu bar, select Utilities > HVAC Tiles / Grid > Layout > Setting Out Points. This displays the HVAC Grid Setting Out Point form.
Enter the S.O.P. Name: HTESTSOP1 Enter the Setting Out Point Height: 2700 (the elevation of the ceiling in which you will eventually position the grilles.). The view direction of the displayed elements must a plan view Click OK
A prompt is displayed Use the 2D cursor to Position a Datum. You want to position the SOP at the exact centre of the room’s ceiling. Rather than trying to pick this point precisely, you will pick a random point in the ceiling plane as the SOP, and then move this point to the exact position required. 79. Pick a point 80. To move this point to the centre of the room, select Position>Explicitly (AT) from the main menu. Enter the coordinates E15000 N9000 U2700 on the Explicit position form (ignore the positioning control form)
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling The SOP appears in the 3D graphical view as a small sphere, and is represented by a DISH element in the PDMS hierarchy 81. Next define a grid in the plane of the ceiling (a horizontal reference grid) through the SOP datum, with the grid lines spaced out from the SOP in both directions. 82. Select Utilities > HVAC Tiles / Grid Layout > Grid from SOP,
This displays the HVAC Layout Grid from SOP form Leave the settings as the default values of 600 83. Click OK.
If the SOP is not the current element a prompt will be displayed Identify the Grid S.O.P. Identify the SOP in the graphical view. If the SOP is the current element this prompt will not be displayed
Now define the horizontal rectangular area which represents the grid boundaries. 84. A prompt will be displayed Position the Southwest Grid Extent. Pick the intersection of the beams at the southwest corner of the room. 85. Another prompt will be displayed Position the Northeast Grid Extent. Pick the intersection of the beams at the northeast corner of the room. Since the room size is 6000mm x 6000mm, the 600 mm grid spacing will give 10 grid squares in each direction within the ceiling area.
To complete this part of the exercise, we will create two grid tiles in the ceiling grid where the HVAC grilles are to be installed.
86. Select Utilities > HVAC Tiles / Grid Layout > Apply Tiles in Grid,
This displays the HVAC Apply Tiles and Grid Form, leave the default settings
87. Click OK 88. A prompt is displayed Identify the Grid S.O.P. Pick the SOP to confirm your intentions. 89. A prompt will be displayed Position the tile centre point (2D cursor) 90. Pick the grid squares shown in the diagram below (the picked points snap to the nearest half tile, so you don’t have to be too precise.). Then press the Esc key on the key board to indicate that you have finished adding tiles.
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
6.2
Creating side branches
Next we are going to create a side branch which runs from a start point on the main branch and which passes through the tile positions. Then two more side branches will be added, each running from a point on the first side branch to the tile positions. (remember that a separate branch is required for each length of ducting between two points) First a suitable connector must be inserted into the main branch so there is a point to which the side branch can be connected.
Exercise continues 91. Navigate to the existing three way item. Another branch connector will be inserted immediately after it in branch sequence. 92. Use the HVAC form to create the next component
From Categories, select Branch Connectors From the displayed HVAC Branch Connectors form select Flat Oval ‘A Plane Boot’ Branch
In the displayed Oval ‘A’ Boot Brco form
Set Boot Width to 610 Set Boot Depth to 152 Set B Offset to 100 Set Boot Direction to E
93. Click OK The oval ducting is to pass along the centreline of the ceiling, the boot must be positioned so that the outlet is aligned with the SOP datum at the ceiling centre. (using Through ID Element on the HVAC form) 94. In the HVAC form:
From Categories, select PDMS Branches From Available Types. Select Side Branch (off main)
95. From the HVAC Side Branch form:
Set Branch Name to HTESTB1.1 Set Insulation Thickness to 50mm Leave specification set to the current default Set Connect Head to Branch Connector Click OK.
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling 96. A prompt will be displayed Identify Branch Connector. Pick the branch connector
L
Any part of the component can be picked, the new branch head will always be connected to the P3 point 97. In the HVAC form:
From categories, select Flat Oval From the displayed HVAC Flat Oval Ductwork form select Straight
98. From the displayed Oval Straight form
Set the Width Direction to N
99. Click OK Two circular boot connectors are now going to be created, from which to route outlets to the two tile positions. These will be created and positioned before the straight is created to which they connect, so that the boots can be positioned relative to the tiles and the length of straight can be adjusted to suit the boot positions. 100. Make the oval straight the current element 101. In the HVAC form:
From Categories, select Branch Connectors From the displayed HVAC Branch Connectors form select Circular Boot Branch
In the displayed Boot Brconnector form
Set Boot Diameter to 150 Set Inner Extension to 76 Set Dist from Leave to 100 Leave Boot Direction set to N
The boot is positioned 100mm back from the PL of the straight on which it is mounted (which is only implied at this stage) 102. Move the boot so that it is aligned through the northernmost tile shown in the diagram above using Position Through ID Element from the HVAC form 103. Create a second circular boot
From Categories, select Branch Connectors From the displayed HVAC Branch Connectors form select Circular Boot Branch
In the displayed Boot Brconnector form
Set Boot Diameter to 150 Set Inner Extension to 76 Set Dist from Leave to 700 Set Boot Direction to S
The Dist from Leave dimension positions the boot 700mm back from the PL of the previous boot. Since the previous boot was set back 100mm from the PL, the difference between the boot positions corresponds to the 600mm offset between the tile positions. The result is as shown
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling The implied ducting between the circular boots can now be replaced with a straight component. Because the boots are sub components, navigate back to the existing straight in this side branch. 104. Navigate back two positions (to STRT1 in HTESTB1.1) in the Design Explorer 105. In the HVAC form:
From categories, select Flat Oval From the displayed HVAC Flat Oval Ductwork form select Straight Click the FIT button to achieve the required length between the PL of the first straight and the PL of the circular boot. Click OK
The calculated length is 2375mm 106. To complete this first side branch, add a cap to the closed end of the last straight; navigate to the last component of HTESTB1.1 in the Design Explorer (the southernmost circular boot) and create a Flat Oval Cap End 107. In the HVAC form:
From categories, select Flat Oval From the displayed HVAC Flat Oval Ductwork form select Cap End Click OK on the displayed Flat Oval Cap End form
108. Connect the HVAC branch Tail to the Last Member of the branch (the cap).
Select Tail from the HVAC Connect menu at the foot of the HVAC form Select Last member
The second side branch will run from the northernmost circular boot to a grille in the adjacent tile. 109. In the HVAC form:
From Categories, select PDMS Branches From Available Types. Select Side Branch (off main)
110. From the HVAC Side Branch form:
Set Branch Name to HTESTB1.1.1 Set Insulation Thickness to 50mm Leave specification set to the current default Set Connect Head to Branch Connector Click OK.
111. A prompt will be displayed Identify Branch Connector. Pick the branch connector
L
Any part of the component can be picked, the new branch head will always be connected to the P3 point 112. Create a Circular Straight with Length set to 750 113. In the HVAC form:
From categories, select Circular From the displayed HVAC Circular Ductwork form select Straight
114. From the displayed Circular Straight form
Set the Length to 750
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
To see what types of leave joint are available, click the Choose button next to the Leajoint field. from the resulting Choose Joint form, select Male Socket & Spigot Joint Click OK on the Choose Joint form
The Leajoint field is updated to show MALE.
Click OK on the Circular Straight form
115. Create a Circular Internal Damper with default settings. The Circular Internal Damper is created 150mm from the leave end of the straight 116. In the HVAC form:
From categories, select Circular From the displayed HVAC Circular Ductwork form, select Internal Damper Leave the default values Click OK
117. Create a Circular Flexible Bend 118. In the HVAC form:
From categories, select Circular From the displayed HVAC Circular Ductwork form, select Flexible Bend Set the Leave Direction to D Click OK
Position the bend so that it is aligned through the appropriate tile. (the bend dimensions will be adjusted later) 119. Move the flexible bend so that it is aligned through the northernmost tile using Position Through ID Element from the HVAC form 120. Use the HVAC form to create a circular to rectangular spigot box
From Categories, select Transformations From the displayed HVAC shape transformation items, select Spigot box
In the displayed Spigot Box form
Set Duct width LA = 300 Set Duct Depth LB = 300 Set Rectangular Box Height = 75 Set Circ Extension = 50 Set Circ Jnt = MALE Click OK
121. Use the HVAC form to create a Rectangular Grille in line
From Categories, select Inline Plant Equipment From the displayed HVAC Inline Plant Equipment form, select Rectangular grille in Line
In the displayed In line grille form
Set Name = GRIL1 Set End width = 400 Set End depth = 400 Set Grille Length = 50 Set ‘A’ Extension = 0 Click OK
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
The grille is to fit within the tile volume. 122. In the HVAC form:
L
Set the Position At option to ID Element A prompt will be displayed Identify Element, Pick the tile, the origin of the grille will be positioned at the origin of the tile.
At this stage the PL of the spigot box and the PA of the grille have become misaligned, so you see a broken line between them rather than a length of implied ducting.
Having positioned the grille correctly, go back along the current side branch and adjust the other components to fit, starting with the spigot box, which will be positioned directly on top of the grille. 123. Navigate to the spigot box (PLEN 1 in the Design Explorer) 124. Select Position At Next from the HVAC form positioning options 125. Navigate to the flexible bend and from the HVAC form Select Modify CE so that you can adjust the dimensions of the flexible bend so that it fits correctly between the internal damper (at its PA) and the spigot box (at its PL). 126. Click the Fit button on the displayed circular Flexible Bend form to recalculate the dimensions necessary for a correct fit. 127. Click Apply and then Click Dismiss 128. Complete the definition of the side branch by connecting the tail to the grille The side branch HTESTB1.1.1 is now as shown in the diagram below
Use the method given above to create a similar side branch, named HTESTB1.1.2 from the second circular boot to a grille (GRIL2) positioned in the other tile. (Remember to navigate up to the level of the branch HTESTB1.1 first)
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling The overall layout of the HVAC ducting in the vicinity of the room will be as shown in the diagram below
129. The network will now be completed by connecting an angled outlet grille to the side arm of the square three way component (bottom left in the preceding view). A fourth side branch must be created. 130. Navigate to the three way component 131. In the HVAC form:
From Categories, select PDMS Branches From Available Types. Select Side Branch (off main)
132. From the HVAC Side Branch form:
Set Branch Name to HTESTB1.2 Set Insulation Thickness to 50mm Leave specification set to the current default Set Connect Head to Threeway Item Click OK.
133. Create a Rectangular Radiused Bend 134. In the HVAC form:
From categories select Rectangular From the displayed HVAC rectangular ductwork form select Radius bend
The bend is to turn in the B direction (click the Picture button for clarification). In the displayed radius bend form
Click the transpose width/depth button. Set the Angle to 135 Set the Inside Radius to 100 Set the Leave Direction to D. Click OK
135. Create a Rectangular Radiused Splitter which fits inside the bend (it is a sub component of the bend).
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
136. In the HVAC form:
From categories, select Rectangular From the displayed HVAC rectangular ductwork form select Radius splitter
in the displayed radius splitter form
Set Splitter Radius to 200 Click OK
Switch to wireline mode (Graphics>shaded or the F8 key) to view the splitter 137. Create a Rectangular Mesh End using default settings, to complete the branch. 138. In the HVAC form
From categories, select Rectangular From the displayed HVAC rectangular ductwork form select Mesh End Click OK
139. Connect the branch tail to the last member in the usual way. This side branch is now as shown in the diagram below
This completes the conceptual design of the basic HVAC network. In the next chapter you will look at some ways in which you can enhance this design further.
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CHAPTER 7
7 7.1
HVAC Splitting Overview
HVAC systems are created as a series of branches and components along the full length of the structure. When the HVAC route is well defined and stable, the HVAC Splitting utility allows the user to split the HVAC system at either logical breaks based on topographical features or at specific points along the HVAC route. The relevant workflow for HVAC is to define the whole route of the HVAC using key elements only i.e. bends, dampers reducers etc. and not filling the implied duct. The splitting can then be done while the implied duct is still present:
Split line
Split line
Auto-filling gaps can be done after splitting Original Split line
Original Split line
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
7.2
The Split HVAC Form
To display the Split HVAC form, in Design - HVAC Designer Application select Modify > Split HVAC…
The Split HVAC form consists of three sections –
7.2.1
Branches to Split Split Markers Split Branches and Move elements into
Branches to Split
This section allows the user to define a list of HVAC branches to be split. It consists of a list pane with a popup menu of options, a drop-down list of options and an Add button. The drop-down list has the following options to be selected in conjunction with the Add button: 1. CE – Adds to the list the HVAC branch element if the CE (Current Element) is an HVAC branch, or adds the owning branch if the CE is an HVAC branch member, or adds all the HVAC branches if the CE is an HVAC main element 2. List – Adds all the HVAC branches from the active list 3. Graphical Pick – Prompts the user to pick an HVAC element using graphical pick and adds the owner branch to the list 4. Window Selection – Allows the user to add HVAC branches from the elements selected using Window selection in graphical window. Only HVAC branches in the selection are added to the list. The user will have to first do the window selection and then select this menu.
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
The list pane, as well as having similar options as the four above, has the following additional options all available from a right click popup menu:
7.2.2
Remove Selected – Removes selected elements from the list. Single or Multiple selection is possible
Remove All – Removes all the elements from the list
Highlight Selection – Toggle menu used to specify whether the selected branch in the list needs to be highlighted or not. Default option is toggle ON. Highlight colour is WHITE.
Split Markers
This section allows the user to define and modify a plane, at which to split the branches, and create and position split markers. Plane definition
The Plane Size text box is used to set/modify the size of the plane.
The Fill toggle is used to set/modify the plane filling.
Define Plane using The drop-down list has the following options in which a plane can be created:
DB Planar Element – PDMS Database element which can be translated into a plane, e.g., panel. Ppoints – Standard ppoint Pline – Standard pline Reference Grid – Grid Section Explicitly… - Allows the user to create a plane explicitly using graphical plane edit form
Modify Plane The drop-down list has the following two options to modify a defined plane:
Definition… – The system prompts the user to pick the plane to be modified. When a plane is picked the system displays the Modify Plane form for the user to the plane definition.
Position – Prompts the user to pick the plane to be modified and the new position of the plane.
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
Create Marker This button creates the split markers at the intersection points between the defined plane and the implied tubes of the HVAC branch elements that are added in the Branches to Split list
Reposition Marker The drop-down list has the following two options,
7.2.3
Explicitly At... Relatively By... each displaying a standard Position form to reposition the created split markers.
Split
This section allows the user to specify the hierarchy into which the split elements will be placed. It consists of the following options:
Current HVAC – Creates new branch for each split marker under the HVAC system where the branch to be split is located.
New HVAC – Creates a new HVAC system and a branch under it for each split marker.
Existing HVAC – Creates new branch under the HVAC system specified in the adjacent text. The existing HVAC system can be specified by typing the name in the text box, or by navigating to the HVAC system and typing ce (case insensitive) in the text box, or by copying and pasting the name of the HVAC system into the text box.
Apply - The Apply button actions the splitting.
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
Exercise continues 140. Split the HVAC element below as shown at the intersection of the roof beams and centreline of ductwork
141. Select Modify>Split HVAC from the main bar menu, the Split HVAC form will be displayed 142. Click on any element in the main branch and click the ADD button on the Split HVAC form. The branch will be added to the Branches to Split
143. Set the Plane Size to 2000 144. Set the Define Plane using Ppoints
A prompt is displayed Pick a P-point that can be translated into a plane
Identify the ppoint on the PL of the first radiused bend, and a plane is displayed at the PL point
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
145. Set the Modify Plane to Definition
The position control form is displayed
Select Element and Intersect A prompt is displayed Modify Plane (Intersection[1]) Snap Identify the centre of the duct A prompt is displayed Modify Plane (Intersection[2]) Snap Identify the steel beam over the duct Click OK on the Modify Plane form
The Plane has now been positioned at the intersection of the duct and the beam
146. click on the Create Marker button
An attachment is created in the HVAC branch at this point
Because the Current HVAC option is selected, the split will create a new branch in the current HVAC element 147. Click Apply and the split function is now complete
A new branch has been created, and the components have been included into this branch as required by the system. The branch can be renamed if required.
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CHAPTER 8
8
Completing the Design
In this chapter we will look at some facilities for enhancing the basic HVAC design model. The main features described are.
8.1
Automatic replacement of implied ducting in gaps by catalogue straights. Automatic addition of stiffening flanges to ductwork items. Automatic item numbering of HVAC components.
Filling ductwork gaps automatically
When you created the main branch HTESTB1, you concentrated on specifying components with specific functions, such as bends, side connection points, silencers and dampers. Most of the gaps between these components were left undefined and were filled by length of implied ducting to complete the representation shown in the 3D view. To enable the design to be prefabricated, it is necessary to specify the fixed lengths of ductwork (ductwork straights) required between these components, so that a full material take-off list can be generated. The HVAC application is able to calculate the optimum combination of standard and non-standard straights needed to fill each gap and then create the corresponding components in the design database automatically.
Exercise continues 148. Navigate to the HVAC element HTESTHVAC 149. To identify what gaps exist in the branch, select Utilities > Autofill with Straights > Show Gaps
150. Click Apply on the displayed Highligh Implied Ductwork form For each gap in the named branch, the scrollable list area of the form shows the:
Location (the preceding component) Length Calculated combination of straights to fill it
All corresponding lengths of implied ducting are highlighted simultaneously in the 3D view
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
151. Make sure you are still at HTESTHVAC, then select Utilities > Autofill With Straights > Fill Gaps
152. This displays the form Autofill with Straights (HVAC). 153. Click Apply A list of all identified gaps is displayed and the specified straight lengths are created automatically to replace the implied ducting. The design explorer shows the new elements.
154. To ensure that the autofilling operation was carried out correctly, repeat steps 149 and 150. The message No gaps to Show confirms this. There is no need to dismiss the form immediately because you still need to check that there are no gaps in any of the four side branches
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
155. To do so, navigate to each in turn, click the CE button at the top of the Highlight Implied Ductwork form, then click the Apply button. In each case you should see the No Gaps to Show message.
8.2
Adding Stiffening Flanges
PDMS provides a utility for calculating the optimum number and positions of stiffening flanges needed to support ductwork items. The configuration of the flanges is tailored to suit the component geometry in each case. You can then create and position such flanges automatically.
L
Note that, in the branch hierarchy, they are treated as subcomponents of the straight.
Exercise continues 156. Add flanges to the ductwork in branch order, starting at the branch head; navigate to the first straight in the main branch (the southernmost straight) and make it the current element 157. Use the HVAC form to calculate the number of stiffeners required for this length of ducting
From Categories, select Rectangular From the available types in the displayed HVAC rectangular ductwork form select Stiffener
The stiffening requirements are calculated, and displayed in the Rectangular stiffening form. PDMS has calculated that this component has a spec requirement of 5 stiffening flanges.
158. To create all 5 stiffening flanges, press the OK the Spec Requirement button, the flanges are created and positioned automatically.
159. Navigate to the next straight and apply the stiffening flanges. 160. Proceeding along the branch, add stiffeners in turn to the
Square bend
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
Mitred offset Radiused bend
The stiffening flanges are configured to suit each different component shape
8.3
Automatic item numbering and naming
The item numbering facility automatically allocates sequential item numbers to all HVAC components and gives each item a name of the format /PREFIXnumber, where /PREFIX is a user definable string and number is the allocated number. Subcomponents (air deflectors, stiffening flanges, etc.) are numbered as decimalised subsets of their owning components. Inline plant items, which are usually named, do not have their names changed.
Exercise continues 161. To autonumber all HVAC items in your current design model, navigate to the owning HVAC element, HTESTHVAC 162. Select Utilities > Automatic Itemising from the main menu. The HVAC Itemising form is displayed
Enter Naming Prefix HTEST/ITEM Leave the Start Number set to 1, Click Apply
The HVAC command Output window is displayed, listing all HVAC items and their allocated numbers. When you compare the entries in this itemising list with those in the Design Explorer, you can see that each item (except any inline component) is now named in the design explorer using the specified prefix /HTEST/ITEM suffixed by the item number. For example, the straights in the main branch, and there stiffening flange subcomponents, appear as follows (the number like =16385/45612 etc. are internal database reference numbers, which you can ignore).
8.4
Finishing off design details
You can now complete the design details for the ductwork straights you have created to replace the implied ducting. To do this you will.
Modify joint types to suit the final design Insert an access panel into the side of a length of ducting.
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
8.4.1
Modifying joint types
When the lengths of implied ducting leading to the two fire dampers were replaced with straight components, the connecting joints will have been assumed to remain as default flanged joints. In fact, the fire dampers require raw edge joints, such that the ducting simply fits over the damper inlet and outlet.
Exercise continues The inlet joint for the damper is, in both cases, the leave joint for the straight that precedes the damper. 163. To modify either one of these joints navigate to the preceding straight 164. In the HVAC form,
Click the Modify CE button
The Rectangular Straight form is displayed (in Modify mode),
Click the Leajoint Choose button From the Choose Joint (HVAC) form Select Raw Edge Joint, Slip over 40mm (RE40)
165. Click OK on the Choose Joint form 166. Click Apply on the on the Rectangular Straight form 167. Use the same procedure to modify the inlet to the other fire damper 168. To modify the outlet joint between the first damper and the square bend (the arrive joint of the bend), navigate to the bend 169. On the HVAC form,
Click the Modify CE button.
The Rectangular Square Bend Form is displayed (in Modify mode)
Click the Arrive Joint Prev button
The arrive joint field is set to RE40 by automatic reference to the previous component, namely the fire damper. 170. Click Apply To modify the outlet from the second damper, connect the branch tail to the last member in the usual way.
8.4.2
Inserting an access panel
The final component of you HVAC ducting network is an access panel in the second to last straight of the main branch.
Exercise continues 171. An access panel will now be inserted, whose catalogue definition includes a predefined working volume, into the side of the last straight of the main branch 172. Navigate to the appropriate straight, this is HTEST/ITEM21
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling
173. In the HVAC form
From categories, select Rectangular From the displayed HVAC rectangular ductwork form select Access Panel From the displayed Access Panel form, choose the Select Size and select 400x350 Click the first Transpose width/depth button to give the required configuration Click OK
Run the automatic itemising utility again so that the access panel is included in the item list 174. When created, the panel appears in the 3D graphical view as a rectangular plate standing slightly proud of the ducting surface.
8.5
Changing the view representation
175. The amount of detail shown in the 3D for different components is controlled by the current representation settings. To see what the settings are, select Settings > Graphics and then select the Representation tab. From the Obstruction pull down menu select Solid and click Apply. Note obstruction volumes on all displayed components are now shown.
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CHAPTER 9
9
Checking and Outputting Design Data
In this chapter you will learn about.
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Methods of checking for errors and inconsistencies in the HVAC layout How to output a design data report derived from the piping model How to generate an isometric plot
Most of these facilities are available from all Design applications, so you can readily check and output data from any combination of design disciplines
9.1
Querying data settings
First, you will look at some ways in which you can query specific data settings as you build up the design model, so that you can check detailed design points at any stage.
Exercise continues 176. Navigate to the square three-way component and then select Query > Item Details > Brief Description. This displays a summary showing the components type, key dimensions and joint specifications.
177. Navigate to the first straight in HTESTB1 and select Query > Item Details > Item Number
178. Navigate to any component and select Query > Item Details > Insulation Depth
179. Use the following Query options for several different types of component:
Query > Position > Origin Query > Position > Position PA Query > Position > Position PL
Compare the results with the catalogue definitions for the corresponding components, as illustrated in Appendix C of Volume 2 of HVAC Design Using PDMS
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9.2
Checking for design data inconsistencies
The data consistency checking utility reports the following types of occurrence (and other similar errors) in the design.
Branch head or tail reference not set Branch Head or tail reference type not valid Adjoining components have incorrectly ordered PA and PL points, e.g. one component may have been flipped while its neighbour was not. Distance between a component and a connected neighbour, or between a component and the branch head or tail, is not valid. Neighbouring connected components, or a component and the branch head or tail, have their PA/PL misaligned. Arrive or leave joint has wrong connection type.
Exercise continues 180. To check your design for data consistency errors, select Utilities > Data Consistency, the Data Consistency Check form appears, use the default settings for all data checking operations You can either send the error report to the screen or a file. Select output Screen The Check list lets you specify how much of the design model you want to check in a single operation. You will check each branch separately, Select Branch from the list 181. Navigate to any component in the main branch HTESTB1 and click Apply. The resulting diagnosis is displayed in the scrollable text area of the Data Consistency Check form.
The messages that appear remind you that the head and tail of the branch have not been explicitly terminated and are not connected to any external item. (Each branch would normally be connected to say, an air handling unit or to some other ductwork in an adjacent design zone or compartment.
182. Repeat the check for each of the side branches in turn
9.3
Data check functions
Further checking can be carried out using the Data Checker facilities, select Utilities > Data Checker; the form includes a customised class of checks specific to the HVAC functions
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These functions can be extended / changed using Aveva’s PML2 facilities
9.4
Data Checker Utility
Utilities>Data Checker… displays a form that is populated with the user defined checks. AVEVA provides a small set of HVAC checks to introduce the users to this powerful utility. See the example below which checks for insulated branches. It can be seen that the B1 and B3 branches are insulated but the B2 branch is not.
9.4.1
Insulation Check
Results can be displayed in any colour; although the branch HTESTB1.1 is un-insulated this is not necessarily an error. Each check runs a PML function; this function can be written to be as intelligent as the user decides. For instance, it could have the intelligence to correct error conditions. The check results can be written to file:
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The example below will be used to demonstrate how simple the PML functions for Checker can be:
9.4.2
Length Check
This check is to test if any HVAC components have a length over 3000mm.
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The lines starting – are comments only so can be ignored.
The ‘if’ statement simply states that; if the element is more than 3000 then write a message and return the result.
The available checks are defined in a file named ‘com-checks.pmldat’ and will be stored in the company or project defaults directory. The user can organise the Checks by class and groups. An example file is shown; the class and group settings can be clearly seen.
The example file produces form values as shown below:
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9.4.3
Branches Fit on main Check
The ‘Do Branch connectors fit on main?’ check will be written by AVEVA Solutions Ltd as part of this development to demonstrate the Checker principles: The original design would pass this test because the rectangular branch connector is flat to the bottom of the main and the circular branch is equal on the main i.e. it is the same depth as the main:
If the main branch was modified to create an error condition, the checker function would identify these errors:
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Both branch connectors will return a failure in the Checker form.
9.5
Generating a data output report
This section describes two ways of outputting design data derived from your design model.
9.5.1
Generating a tabulated report showing the material required to build the design Creating an isometric plot showing the design layout and associated manufacturing data.
Generating a tabulated data report
The reporting utility lets you read selected information from the database and present the output in a tabulated format. Each report can be customised by specifying some or all of the following.
Where the output is to appear (on screen or in a file ready for printing) An introductory header which is to appear at the beginning of the report. The page length (if the report is to paginated) The page layout, including number and positions of columns, column headings, etc. Any headers and footers which are to appear at the top and bottom of each page The selection criteria which define which data settings are to be included in the report.
Once such a report has been designed, its specification can be saved for further use in the form of a report template file. You will look at the results of the process by using a pre-prepared template which outputs a material take-off list showing the length of tube needed to build your design.
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A company standard report template will probably be used in most reports.
Select Utilities > Reports > Run to initiate the reporting process. This displays the File Browser listing all files in the current reporting directory (specified by your system administrator as part of the project setup procedure)
Navigate to the C:\AVEVA\PDMS12.0\PDMSUI\REPORTS\TEMPLATES directory by selecting it from the Sub-directories window. All files with a .tmp suffix are report templates. Select the hvac_list.tmp, which has been designed to produce a list of the principle components (omitting subcomponents and branch connectors) in the HVAC design.
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Click Open on the file browser The report details form which appears requires you to specify where the report is to be written and what part of the database hierarchy is to be read when extracting the required types of data. Leave the filename text box empty (this sends the report automatically to the screen), in the Hierarchy text box, enter /HTESTHVAC (this lists the components for the whole HVAC network), then click OK to run the report.
The tabulated report output is displayed in a Command Output window which is opened automatically. The report lists all principle components in the specified network (the whole of your HVAC design model) in branch head to tail order. The type and key dimensions for each component are tabulated as predefined by the template.
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CHAPTER 10
10 HVAC Items System Attribute The HVAC Items system attribute gives the user the ability to group HVAC elements by system. This could be as simple as defining systems for AC supply, AC return, Exhaust and Vent.
10.1 Creating / Modifying System Hierarchy In the exercise you will create a system hierarchy and add the HVAC element created previously to the system group
Exercise continues 183. From the main bar menu, select Create>System hierarchy. 184. The System Hierarchy form is displayed 185. Click the right mouse button over the Design WORL * in the explorer
The Create System Group World form is displayed Enter Name PDMS Enter function ACSU Enter Description Air Conditioning Supply Enter Purpose HVAC Click OK, and a SYGPWL is created
186. Click the right mouse button over the newly created SYGPWL
The Create System Group Area form is displayed Enter Name HVAC_SYSTEMS Enter Function BLDG Enter Description Air Conditioning Supply Enter Purpose ACSU Click OK, and a SYGPAR is created
187. click the right mouse button over the newly created SYGPAR
The Create System form is displayed Enter Name AC_SUPPLY Enter Function BLDG Enter Description Air Conditioning supply Enter Purpose ACSU Click OK, and a SYSGRP is created
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AVEVA Plant (12 Series) Heating, Ventilation & Air Conditioning Modelling 188. Navigate to the HVAC element HTESTHVAC
189. From the main bar menu select Utilities>Systems
The Modify Design System form is displayed Click System Add The System Explorer is displayed Select the system group Click OK
190. the system is now displayed in the Modify Design System form
Enter a description and function if required Click Apply Click Close
Now the system has been created, and the HVAC is referencing the group, it is possible to create reports, drawings and export data based on system. On the HVAC element the attribute MDSYSF holds the reference to the system.
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CHAPTER 11
11 HVAC Spooling The HVAC Spooling utility allows the user to split the HVAC design into logical sections (spools) to facilitate component fabrication. Hence an HVAC Spool is a collection of HVAC elements to be manufactured as a single entity. The HVAC element contains a HSLIST, which contains HSPOOL elements. These can be viewed from the Members List, they are not displayed in the Design Explorer. These elements are managed by the application and cannot be deleted outside of the HVAC spool application.
11.1 Generating HVAC Spools using the HVAC Spool Manager The following shows how the HVAC Spool Manager enables the user to generate HVAC spools automatically.
Exercise continues 191. From the main bar menu select Utilities > HVAC Spooling...
The current HVAC element will be displayed in the form If the element displayed is not the HVAC required for spooling, navigate to the element in the Design Explorer and click Set HVAC A default HVAC Spool List Name is entered by the application, this can be changed to suit If the toggle for Autoname is unchecked, the spools will be named is sequence with the given name, if the toggle is checked, autonaming rules apply. Click Generate this generates the spools and populates the HVAC Spool Manager form with a spool list. A spool has been generated for each individual component. (not sub components)
Selecting a spool, e.g. HTESTHVAC-Spools/HS3, in the list highlights that particular spool in the accompanying graphical representation.
Delete Spools Delete all the Spools in the list Regenerate Regenerates the Spool list
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11.2 HVAC Spool Verification There are two options available for verification Verify HVAC Verifies the Spool list. Verify HVAC Spool Verifies the selected Spools.
The verification results are listed in two columns: Verification Status Shows whether the Spool is “Successful” or “Failed” Failure Details Lists error messages. Results Summary Displays the verification result for the Spool list and indicates modifications required to make the list valid.
Exercise continues 192. Click Verify HVAC, we shall verify all the spools generated for the HVAC element HTESTHVAC
All spools have a verification status of successful
11.3 Modifying an HVAC Spool The spool content can be modified using the two options:
Add Spool Elements Adds element(s) to a spool in the list. Remove Spool Elements Removes element(s) from a spool in the list.
The spool, to which an element is to be added or removed, is selected in the list, highlighting the current spool in the graphical representation. The Add or Remove option is selected and the user is prompted to select an item(s) graphically to either add to or remove from the current spool. Only adjacent, contiguous items should be selected in order to ensure that the resulting spool remains valid. The system will attempt to maintain the existing adjacent spools automatically, however, it is important that the spools are re-verified and if necessary regenerated. Exercise continues 193. From the HVAC Spool Manager form select the spool HTESTHVAC-Spools/HS17, this will also be highlighted in the graphical view
194. Click Add Spool Elements and a prompt Pick HVAC components to add to the selected spool or to complete is displayed
195. Identify the components as highlighted in red
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Spool HTESTHVAC-Spools/HS17 now incorporates the additional components
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CHAPTER 12
12 HVAC Sketches 12.1 HVAC Sketch Production The next stage is to produce HVAC sketches. The following workflow exists. The user will navigate to a level in the design hierarchy and get a list of the spools for that level. The user can filter by name and then select from the list, the HVAC spools that they want to generate sketches for. After they have identified the template to use for the sketches and a place in the Draft database to store the generated sketches they will be able to generate the sketches. The HVAC Sketch form allows the user to identify the spools from a level in the Design hierarchy from where they want to produce sketches. Using this form the user can also select the drawing template to use for the sketches and a place to store the sketches in the Draft database.
Exercise continues 196. From the main bar menu select Design>Modules>Draft, you will now be taken into the DRAFT module 197. From the main bar menu in DRAFT, select Draft>Auto Drawing Production
The ADP application will be initialised
198. From the main bar menu select Display>Explorers>Design Explorer 199. The Design Explorer is displayed, navigate to HTESTHVAC 200. Select Create>HVAC Sketches from the main bar menu and the HVAC sketches form is displayed 201. In the Sketch Template enter /DRA/PRJ/TMP/HvacSketch/A4 202. From the main bar menu select Create>Dept
The Create Dept form is displayed Enter Name HVAC_DEPT Click OK Click OK on the displayed Department Information form Enter name HVAC_REGI in the displayed Create REGI form Click OK Click OK on the displayed Registry Information form
203. In the Create Sketches in Registry enter HVAC_REGI 204. In the Log File enter a file name for the log file 205. Select HTESTHVAC-Spools/HS17 206. Click on the Create Sketches button The following sketch is generated
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Other functions available on the form when a spool is highlighted, from the right mouse button Select All – Selects all Spools. Clear Selection – Unselects all Spools. Print Sketch – Print dialog to print all selected Spools. Delete Sketch – Deletes each selected Spool. Options are activated/inactivated according to selection.
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