HEI 2629-2012 (E11) Standards for Steam Surface Condensers

July 5, 2017 | Author: Francisco Cardenas | Category: Heat Exchanger, Pressure, Heat Transfer, Steam, Temperature
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STANDARDS FOR STEAM SURFACE CONDENSERS 10TH EDITION HEI 2929-2012 (E11)...

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‫ډڿۀۏۄڽۄۃۊۍۋٻ۔ۇۏھۄۍۏێٻۀۍڼٻۉۊۄۏېڽۄۍۏێۄڿۀۍٻڿۉڼٻۉۊۄۏھېڿۊۍۋۀۍٻہۊٻۈۍۊہٻ۔ۉڜٻډړڋڈړڋڈڎڌڋڍٻډڟگڧٻډۊڞٻڤڣڣٻۊۏٻڿۀێۉۀھۄڧ‬

Heat Exchange Institute, Inc.

PUBLICATION LIST TITLE Standards for Closed Feedwater Heaters, 8th Edition, 2009 Standards for Shell and Tube Heat Exchangers, 4th Edition, 2004 (R. 2008) Standards for Tray Type Deaerators, 9th Edition, 2011 Performance Standards for Liquid Ring Vacuum Pumps, 4th Edition, 2010 Standards for Direct Contact Barometric and Low Level Condensers, 8th Edition, 2010 Standards for Steam Jet Vacuum Systems, 7th Edition, 2012 Standards for Steam Surface Condensers, 11th Edition, 2012 Standards for Air Cooled Condensers, 1st Edition 2011 CONDENSER TECH SHEETS Tech Sheet # 101: Operational Alert on Steam Pumps Tech Sheet # 113: Condenser Basics Tech Sheet# 117: Waterbox Coating Tech Sheet # 122: Condenser Modular

Replacement vs. Retube Tech Sheet # 123: Steam Inlet Expansion Joints Tech Sheet # 124: Relief Values vs. Rupture Discs Tech Sheet # 125: Condenser Tube Cleaning Tech Sheet# 131: Vacuum Breaker Valve All condenser tech sheets are available for download on the HE! web site: www.heatexchange.org 1300 Sumner Avenue Cleveland, Ohio 44115-2851 216-241-7333 Fax: 216-241-0105 www .heatexchange.org email: [email protected]

‫ډڿۀۏۄڽۄۃۊۍۋٻ۔ۇۏھۄۍۏێٻۀۍڼٻۉۊۄۏېڽۄۍۏێۄڿۀۍٻڿۉڼٻۉۊۄۏھېڿۊۍۋۀۍٻہۊٻۈۍۊہٻ۔ۉڜٻډړڋڈړڋڈڎڌڋڍٻډڟگڧٻډۊڞٻڤڣڣٻۊۏٻڿۀێۉۀھۄڧ‬

STANDARDS for STEAM SURFACE CONDENSERS

ELEVENTH EDITION ccopyright October 2012 by Heat Exchange Institute 1300 Sumner Avenue Cleveland, Ohio 44115-2851 Reproduction of any portion of this standard without written permission of the Heat Exchange Institute is strictly forbidden.

‫ډڿۀۏۄڽۄۃۊۍۋٻ۔ۇۏھۄۍۏێٻۀۍڼٻۉۊۄۏېڽۄۍۏێۄڿۀۍٻڿۉڼٻۉۊۄۏھېڿۊۍۋۀۍٻہۊٻۈۍۊہٻ۔ۉڜٻډړڋڈړڋڈڎڌڋڍٻډڟگڧٻډۊڞٻڤڣڣٻۊۏٻڿۀێۉۀھۄڧ‬

HEAT EXCHANGE INSTITUTE, INC. STEAM SURFACE CONDENSERS Thermal Engineering International (USA) Inc. Santa Fe Springs, California

D C Fabricators, Inc. Florence, New J ersey ,..

Holtec International Marlton, New Jersey

SPX Heat Transfer, Inc. Tulsa, Oklahoma

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‫ډڿۀۏۄڽۄۃۊۍۋٻ۔ۇۏھۄۍۏێٻۀۍڼٻۉۊۄۏېڽۄۍۏێۄڿۀۍٻڿۉڼٻۉۊۄۏھېڿۊۍۋۀۍٻہۊٻۈۍۊہٻ۔ۉڜٻډړڋڈړڋڈڎڌڋڍٻډڟگڧٻډۊڞٻڤڣڣٻۊۏٻڿۀێۉۀھۄڧ‬

CONTENTS 1.0 NOMENCLATURE...... ......................................................................................................... 2.0 DEFINITIONS .. .. . . .. .. .. . .. . .. .. .. . .. .. .. . .. .. . .. .. .. . .. .. . .. .. . .. .. .. . .. .. .. . .. .. .. . . .. .. .. . .. .. . .. .. . .. . .. .. .. .. . .. .. .. .. .. . 2.1 Absolute Pressure ...... ........... ..... ............................. ............ ... ..... ..... ......... ........... ... 2.2 Circulating Water Velocity ..... ..... ..... .. .. . .. ... ....... ........ ..... ...... ... .. ... ..... ..... .. .. ... .. .... ..... 2.3 Cleanliness Factor . . . . . . .. . . . .. . . .. . . . .. .. . . . .. .. . .. . . . .. . . . .. .. . .. .. .. . .. .. . .. .. . .. . .. .. . .. .. . . . .. .. .. . .. .. .. .. . . . .. 2.4 Condensate Temperature Depression (Subcooling) ......................................................... 2.5 Condenser Duty . . .. . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . .. . . . . . . . . .. . . . . . .. .. . . . . . . . . . . . .. . . . .. . . . . . . . . .. .. . . . . . . . .. .. . . . .. 2.6 Condenser Heat Transfer Coefficient .. .. .. .. .. .. .. .. .. .. .. .. . . .. .. . . .. .. . .. . .. .. .. .. .. .. .. .. .. .. .. .. . .. .. .. .. .. 2.7 Condenser Pressure........ ........................................................................................... 2.8 Condensing Steam Temperatw·e . . . . . . . .. .. . . . .. . . . . . . .. .. . .. .. .. . . . .. . . . .. . . . .. . . . .. . . . .. . . . .. . . . . . . . . . . . . . . .. .. 2.9 Effective Surface .. .. . .. .. .. . . . .. .. . .. . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. . .. .. 2.10 Effective Tube Length................................................................... .. .... ... ... ................. 2.11 Hotwell Capacity . . .. . . . .. . . . . . .. .. . . . .. .. . .. .. .. . .. .. . .. . . . .. .. . .. .. . . . .. .. .. . .. ... .. . .. .. . .. .. . .. . . .. . .. .. .. .. . . . .. .. 2.12 Initial Temperature Difference.................................................................................... 2.13 Logarithmic Mean Temperature Difference . . .. . . . . . . . . . . . . . . . . . .. . .. .. . . . .. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . 2.14 Static Pressw·e .. ... .............. ................. ............... ......... .. ............................ .. ......... .... 2.15 Temperature Rise ................................................................................................... 2.16 Terminal Temperature Difference .. .............. .......... .. ......... ..... .................... ................

0

3 3

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3 3

3 .0 SYMBOLS AND UNITS .. .. . .. .. . .. .. .. . . . .. .. . . . .. . . . . . .. . .. .. . .. . . . .. . . . . . . . .. . . . . . .. . . . .. . . . .. . .. . . . . . . . . . . . . . . . . . . . .. . . . .

4-5

4.0 CONDENSERPERFORMANCE .......................................................................................... 4.1 General Considerations ............................................................................................ . 4.2 Heat Transfer Rates ............................................................................................... . 4.3 Oxygen Content of Condensate .......... ..... .......... ..... .. ................................................... . 4.4 Performance Cw-ves .......... ..... .......... ..................................... ............. .... ....... .... ..... . 4.5 Hydraulic Loss-Circulating Water Pressure Loss .... .... ........................ ................... ..... . 4.6 Cndensate Temperature Depression ........ .... ......................... .................. .............. .. ... . 4.7 Geothermal Applications ............ o•••o•o .. o................................................................... .

6 6 6

5.0 SERVICE CONNECTIONS ..... .... .... .......... General Considerations ....................................... .............. ............... ....... ..... ............ . 5.1 5.2 Flow Data .... ............................... ..... .. ............................... ..... .............. .... ........... 5o3 Connection Locations ............................. 5.4 Connection Design Guidelines ......................... .......................................................... . o ...................... .. ....... . ...... .... ... ...... .... ......... . ......... .

0 .. .

0 .................................. 0 .. ..... ..... ..... ............. .

5.5

Turbine Bypass Guidelines ...................................................................................... .

6.0 VENTING EQUIPMENT CAPACITIES .. . .. . .. .. .. . .. .. ... .. . .. .. ... .... .. . . . .. . .. ... . . .. . .. .. ... .. . .. .. .. .. ... .. . .. .. . Venting Requirements 0. 0.............. ... ..... 0............................................ 0..... .. ..... ......... . 6.1

6.2 6.3

13

15 15 18

25 26 26 26 26 27 28

29 29 29 29 29 29

Design Suction Pressure ................................................................. ........................ . Design Suction Temperature ........ .... ........ ............. ..... ... .......... ..... ..... ...... Calculation of Water Vapor Load Component ..................... .... Minimum Recommended Capacities .......................................................................... . Rapid Evacuation Equipment .

30

7.0 ATMOSPHERIC RELIEF DEVICES...................................................................................... . 7.1 General .............. o... o............. . ... o........ .......... ..... oo ........... . ......... . .... . ....... o............ .. 7.2 Atmospheric Relief Valves.......................................................................................... 703 Rupture Devices ....................................................................................... 0.... .... .. ... .

35 35 35 35

8.0 CONSTRUCTION ......... ............ .... .......... ............................................................. oo.............

36 36 36

6.4

6.5 6.6

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.... ..... ............ .... ................. ............. .... . 8.1.1 Design Philosophy .............................................................................. ..... ... . 8.1.2 Materials ofConstruction ............................................................................. . 8 .1.3 Design Pressures .......................................... ....................................... .... .. 8.1.4 Hydrostatic Testing ................................................................................... . 8.1.5 Corrosion Allowances .......... ............................................. ... ..... ... .............. . Design And Construction Methods .......... 8.2.1 Design Factors of Safety ............................................................................. . 8.2.2 Design By More Exact Analyses and By Empirical Formula and Testing ···· ·•o••o• · 8.2.3 Shell Design .......... 0...... 0....... 0.......... 0................... .... ....... ... .......... 0... ........ . 8.2.4 Support Plate Design Guidelines ................................................................. . Water Box Thickness Design Guidelines ..... ..................... ................. ............. . 8.2.5 0

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36 36 37 38 38 38 38 40 44

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CONTENTS (continued) S.2.6 Design Procedures For Flanges and Bolting .................................................. . S.2.7 Tubesheet Design Guidelines ....................................................................... . S.2.S Condenser Tube Ends ................................................................................ . S.2.9 Tubesheet and Support Plate Hole Criteria .................................................. . Welding .............................................................................................................. . Lagging for Extraction Lines and Feedwater Heaters ................. ................................. . Fabrication for Geothermal Service ............................................................................. . Condenser Support Systems ...................................................................................... .

46 46 50 50 52 52 54 55

9.0 INSPECTION, QUALITY, TRANSPORTATION, AND FIELD INSTALLATION .......................... . 9.1 Inspection and Quality of Welding Standards .............................................................. . 9.2 Surface Preparation Requirements ............................................................................. . 9.3 Painting, Coating, Linings, and Corrosion Protection .................................................. . 9.4 Quality Assurance .................................................................................................. . 9.5 Dimensional Tolerances ............................................................................................ . 9.6 Shipping and Site Storage ......................................................................................... . 9.7 Field Installation .................................................................................................. . 9.S Erection Superintendent Duties ................................................................................ . 9.9 Post Erection Walk Down ........................................................................................ ..

56 56 56 60 60 61 61 61 62 62

APPENDICES APPENDIX A APPENDIXB APPENDIXC APPENDIXD

71

S.S S.4 S.5 S.6

APPENDIXE APPENDIXF APPENDIXG APPENDIXH APPENDIX! APPENDIXJ APPENDIXK APPENDIXL

Typical Specification for Steam Surface Condensers ......................................... . Metric Conversion Factors .......................................................................... . Areas of Circular Segments ......................................................................... .. Procedure for Calculating Allowable Nozzle External Fo1·ces and Moments in Cylindrical Vessels ................................................................ .. Air and Water Vapor Mixture Data (Dalton's Law) ......................................... . Mechanical Characteristics of Tubing ........................................................... . Troubleshooting Guide ................................................................................ . HEI Surface Condenser Data Sheet .............................................................. . Condenser Tubes Stress Values .................................................................... . Condenser Material Stress Values ................................................................. . Tubes Material Properties .......................................................................... . Condenser Performance ............................................................................. .

66 75 76 81 8S S7 91

92 9S 94 95

TABLES TABLE 1 TABLE2 TABLES TABLE4 TABLES TABLE6 TABLE6A TABLE6B TABLE 6C TABLE? TABLES TABLE 9 TABLE 10 TABLE 11 TABLE 12 TABLE 1S TABLE 14 TABLE 15

Uncorrected Heat Transfer Coefficients U 1 ..................................................... . Inlet Water Temperature Correction Factor F ~ .................................... ........... . Tube Material and Gauge Correction Factors l''M ........................................... .. Venting Capacity and Oxygen Content ........................................................... . Gauge Correction Factor for Friction Loss R 2 .............. . .................................. .. Rapid Evacuation Equipment Dry Air Capacities ............................................ . Venting Equipment Capacities: One Condenser Shell ..................................... .. Venting Equipment Capacities: Two Condenser Shells ................................... . Venting Equipment Capacities: Three Condenser Shells ................................... . Atmospheric Relief Valve Sizes .................................................................... . Typical Materials of Construction ................................................................ .. Correction Factor K 1 ................................................................................ · .. • Correction Factor K 2 ................................................................................ • • • • Correction Factor KJ!. ................................................................................... . Support Plate Hole :size Limits .................................................................... . Tubesheet Hole Size Limits .......................................................................... . Weld Acceptance Criteria ............................................................................ .. Condenser Surface Preparation Requirements ............................................... .

S4 S5 S7 45 45 45 50 50 58 6S

FIGURES FIGURE 1 FIGURE2 FIGURES FIGURE4 FIGURE 5 FIGURE 6 FIGURE? FIGURES

Uncorrected Heat Transfer Cofficeints U 1 ..................................................... . Inlet Water Temperature Correction Factor Fw ............................................... . Absolute Pressure Limit Curves for Oxygen Content ...................................... . Sample Performance Curve .......................................................................... . Absolute Pressure Limit Curves .................................................................... . Friction Loss for Water Flowing in 18 BWG Tubes Rr ...................................... . Temperature Correction for Friction Loss in Tubes R 1 ..................................... .. Water Box and Tube End Losses Single Pass Condensers RE······························

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