ANSI ASME PTC 6.2-2011 Steam Turbines in Combined Cycles.pdf
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1、Steam Turbines in Combined CyclesPerformance Test CodesAN AMERICAN NATIONAL STANDARDASME PTC 6.2-2011(Revision of ASME PTC 6.2-2004)ASME PTC 6.2-2011Steam Turbines in Combined CyclesPerformance Test CodesAN AMERICAN NATIONAL STANDARD(Revision of ASME PTC 6.2-2004)Three Park Avenue New York, NY 10016
2、 USADate of Issuance: October 21, 2011This Code will be revised when the Society approves the issuance of a new edition. ASME issues written replies to inquiries concerning interpretations of technical aspects of this Code. Periodically certain actions of the ASME PTC Committee may be published as C
3、ode Cases. Code Cases and interpretations are published on the ASME Web site under the Committee Pages at http:/cstools.asme.org as they are issued.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meet
4、ing the criteria for American National Standards. The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available for public review and c
5、omment that provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large.ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity.ASME does not take any position with respect to the validity of
6、any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable letters patent, nor assumes any such liability. Users of a code or standard are expressly advised that
7、 determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility.Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this c
8、ode or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies, which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic r
9、etrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2011 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.iiiCONTENTSNotice vForeword viComm
10、ittee Roster viiCorrespondence With the PTC Committee . viiiSection 1 Object and Scope 11-1 Object . 11-2 Scope 11-3 Uncertainty . 1Section 2 Definitions and Descriptions of Terms 22-1 Symbols 22-2 Abbreviations . 22-3 Definitions 2Section 3 Guiding Principles . 43-1 Introduction 43-2 Test Plan 63-3
11、 Preliminary Testing . 93-4 Isolation of the Cycle . 93-5 Conduct of Test 103-6 Calculation and Reporting of Results . 13Section 4 Instruments and Methods of Measurement . 174-1 General Requirements . 174-2 Pressure Measurement 224-3 Temperature Measurement 264-4 Flow Measurement 294-5 Electrical Ge
12、neration Measurement 324-6 Data Collection and Handling . 37Section 5 Computation of Results 395-1 Fundamental Equation . 395-2 Data Reduction 395-3 Correction of Test Results to Specified Conditions . 395-4 Uncertainty Analysis . 48Section 6 Report of Results . 506-1 General Requirements . 506-2 Ex
13、ecutive Summary 506-3 Introduction 506-4 Calculations and Results 506-5 Instrumentation . 506-6 Conclusion 516-7 Appendices . 51Figures3-1.2-1 Three-Pressure Reheat Steam Turbine Heat Balance 53-1.2-2 Two-Pressure Nonreheat Steam Turbine Heat Balance 63-1.3.2 Net Turbine Equipment Electrical Output
14、. 73-5.5.1 Required Number of Readings . 133-5.5.3 Uncertainty Intervals 144-1.2.3-1 Location and Type of Test Instrumentation for Combined Cycle (Triple Pressure HP/IP-LP Reheat Steam Turbine) Test Procedure 19iv4-1.2.3-2 Location and Type of Test Instrumentation for Combined Cycle (Triple Pressure
15、 HP-IP/LP Reheat Steam Turbine) Test Procedure . 204-2.6.2-1 Five-Way Manifold 244-2.6.2-2 Water Leg Correction for Flow Measurement . 254-2.7.3-1 Basket Tip 264-2.7.3-2 Guide Plate . 274-5.2.1-1 Two-Meter System for Use on Three-Wire Delta-Connected Power Systems 334-5.2.1-2 Two-Meter System for Us
16、e on Three-Wire Wye-Connected Power Systems . 344-5.2.2 Three-Meter System for Use on Four-Wire Power Systems 345-3.2.1 Illustration of a Correction Curve With Independent and Interacting Variables . 445-3.2.2 Illustration of a Correction Curve With Two Independent Variables 45Tables2-1 Symbols . 33
17、-1.3.5 Allowable Deviations 73-2.4.2 Definition of Variables for Benchmark Testing . 93-5.5.1 Definitions and Notes for Fig. 3-5.5.1 . 143-6.4.1 Allowable Uncertainty 154-4.1.4 Units in the General Flow Equation . 304-4.1.5-1 Summary Uncertainty of Discharge Coefficient and of Expansion Factor, Pres
18、sure, and Differential Pressure in the Same Units 314-4.1.5-2 Uncertainties in Mass Flow for Correctly Applied Differential Pressure Flowmeters 325-1 Application of Corrections . 405-3.1.1 Correction Formulations. 415-3.2.1 Output From a Turbine Performance Modeling Program, Example 1 445-3.2.2 Outp
19、ut From a Turbine Performance Modeling Program, Example 2 455-3.3 Terms Used for Flow Capacity Correction . 45Mandatory AppendixI Correction Formulation Methodology . 53Nonmandatory AppendicesA Sample Test Calculation 59B Sample Test Uncertainty Calculation 79C Procedures for Determining HP to IP Le
20、akage Flow 87vNOTICEAll Performance Test Codes must adhere to the requirements of ASME PTC 1, General Instructions. The following information is based on that document and is included here for emphasis and for the convenience of the user of the Code. It is expected that the Code user is fully cogniz
21、ant of Sections 1 and 3 of ASME PTC 1 and has read them prior to applying this Code.ASME Performance Test Codes provide test procedures that yield results of the highest levelof accuracy consistent with the best engineering knowledge and practice currently available. They were developed by balanced
22、committees representing all concerned interests and specify procedures, instrumentation, equipment-operating requirements, calculation methods, and uncertainty analysis.When tests are run in accordance with a Code, the test results themselves, without adjustment for uncertainty, yield the best avail
23、able indication of the actual performance of the tested equipment. ASME Performance Test Codes do not specify means to compare those results to contractual guarantees. Therefore, it is recommended that the parties to a commercial test agree before starting the test and preferably before signing the
24、contract on the method to be used for comparing the test results to the contractual guarantees. It is beyond the scope of any Code to determine or interpret how such comparisons shall be made.viFOREWORDASME Performance Test Code 6 on Steam Turbines is most directly targeted for application to steam
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