ASME PTC 12.2 2010.pdf

ASME PTC 12.2 – 2010 [Revision of ASME PTC 12.2 – 1998 (R2007)]

Steam Surface Condensers Performance Test Codes

AN AMERICAN NATIONAL STANDARD

Three Park Avenue • New York, NY • 10016 USA

CONTENTS Notice .................................................................................................................................................................................... Foreword .............................................................................................................................................................................. Committee Roster ................................................................................................................................................................ Correspondence With the PTC Committee ..................................................................................................................... Introduction .........................................................................................................................................................................

v vi viii ix 1

Section 1 1-1 1-2 1-3

Object and Scope .................................................................................................................................... Object ............................................................................................................................................................... Scope ................................................................................................................................................................ Uncertainty .....................................................................................................................................................

2 2 2 2

Section 2 2-1 2-2 2-3

Definitions and Descriptions of Terms .................................................................................................... Symbols ........................................................................................................................................................... Subscripts ........................................................................................................................................................ Superscripts ....................................................................................................................................................

3 3 3 3

Section 3 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 3-9 3-10 3-11 3-12 3-13 3-14 3-15 3-16

Guiding Principles ................................................................................................................................... Purpose and Intent ........................................................................................................................................ Agreement Between Parties to the Test ...................................................................................................... Test Considerations ....................................................................................................................................... Pretest Agreements ........................................................................................................................................ Allowable Deviations .................................................................................................................................... Preparation for Test ....................................................................................................................................... Condenser Isolation ...................................................................................................................................... Noncondensible Gas Load ........................................................................................................................... Tubeside Blockage ......................................................................................................................................... Tubeside Fouling ............................................................................................................................................ Dissolved Oxygen .......................................................................................................................................... Preliminary Testing ....................................................................................................................................... Test Records .................................................................................................................................................... Duration of Test Runs ................................................................................................................................... Determining the Overall Heat-Transfer Coefficient, U ............................................................................ Auxiliary Parameters ....................................................................................................................................

5 5 5 5 5 7 7 7 7 7 7 7 8 8 8 8 9

Section 4 4-1 4-2 4-3 4-4 4-5 4-6 4-7 4-8 4-9 4-10 4-11 4-12 4-13

Instruments and Methods of Measurement ............................................................................................ Purpose and Intent ........................................................................................................................................ Location of Test Points ................................................................................................................................. Measurement of Condenser Pressure ......................................................................................................... Cooling-Water Temperature ......................................................................................................................... Cooling-Water Flow ...................................................................................................................................... Noncondensible Flow ................................................................................................................................... Hotwell Level ................................................................................................................................................. Waterbox Level .............................................................................................................................................. Tube Cleanliness ............................................................................................................................................ Waterbox Differential Pressures .................................................................................................................. Dissolved Oxygen .......................................................................................................................................... Condensate Temperature .............................................................................................................................. Saline or Brackish Water Concentration .....................................................................................................

10 10 10 10 12 14 19 20 20 20 20 22 22 22

Section 5 5-1 5-2 5-3

Computation of Results ........................................................................................................................... Basic Heat-Transfer Relations ...................................................................................................................... Calculations for Condenser Pressure Deviation Results ......................................................................... Calculations of Results Deviations for Other Parameters .......................................................................

23 23 24 26

iii

Section 6 6-1 6-2

Report of Results ..................................................................................................................................... Composition of Report .................................................................................................................................. Report Data .....................................................................................................................................................

28 28 28

Figures 4-2.1-1 4-3.2.2-1 4-3.2.3-1 4-5.1-1 4-9.1-1 5-2.8-1 5-2.8-2

Location of Condenser Test Points .............................................................................................................. Basket Tip ........................................................................................................................................................ Guide Plate ..................................................................................................................................................... Recommended Velocity Traverse Probe Positions .................................................................................... Tube Cleanliness Test-Sequence Flowchart ............................................................................................... Multiple-Shell Multipressure Condenser ................................................................................................... Single-Shell Multipressure Condenser .......................................................................................................

12 13 13 16 21 27 27

Tables 2-1-1 3-4-1 3-4-2 4-1-1

Symbols ........................................................................................................................................................... Noncondensible Gas Load (Air In-Leakage Limits) ................................................................................. Allowable Deviations From Specified Test and Steady-State Conditions ............................................. Typical Total Instrument Accuracy .............................................................................................................

3 6 7 11

Nonmandatory Appendices A Alternative Test ................................................................................................................................................ B Flowcharts and Checklists.............................................................................................................................. C Automatic Data Acquisition ......................................................................................................................... D Performance Monitoring ................................................................................................................................ E Example Calculations...................................................................................................................................... F Air Binding ....................................................................................................................................................... G Air In-Leakage ................................................................................................................................................ H Noncondensible Removal Equipment.......................................................................................................... I Physical Properties of Seawater..................................................................................................................... J References .........................................................................................................................................................

29 35 42 43 45 53 56 58 64 68

iv