ASME PTC 4.4-2023 [Revision of ASME PTC 4.4-2008 (R2013)] Gas Turbine Heat Recovery Steam Generators Performance Test Codes ANAMERICAN NATIONAL STANDARD TheAmericanSocietyof S2 Mechanical Engineers ASME PTC 4.4-2023 [Revision of ASME PTC 4.4-2008 (R2013)] Gas Turbine Heat Recovery Steam Generators Performance Test Codes AN AMERICAN NATIONAL STANDARD S TheAmerican Societyof Mechanical Engineers Two Park Avenue · New York, NY : 10016 USA Date of Issuance: March 29, 2024 This Code will be revised when the Society approves the issuance of a new edition. This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The standards committee that approved the code or standard was balanced to ensure that individuals from competent and concerned interests had an opportunity to participate. The proposed code or standard was made available for public review and comment, which provided an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large. ASME does not"approve," “certify," "rate," or"endorse" any item, construction, proprietary device, or activity. ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this industry endorsement of this code 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. The endnotes and preamble in this document (if any) are part of this American National Standard. ASME Collective Membership Mark All rights reserved."ASME" and the above ASME symbol are registered trademarks of The American Society of Mechanical Engineers. No part of this document maybe copied,modified, distributed, published,displayed, or otherwisereproduced in anyform or by any means, electronic, to train, create, or improve any artificial intelligence and/or machine learning platform, system, application, model, or algorithm is strictly prohibited. The American Societyof Mechanical Engineers Two Park Avenue, New York, NY10016-5990 Copyright 2024 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS Printed in U.S.A. CONTENTS Notice . vi Foreword vi Committee Roster vili Correspondence With the PTC Committee ix Section 1 Object, Scope, and References 1 1-1 Object. 1 1-2 Scope. 1-3 Test Uncertainty 1-4 References.. Section 2 Definitions of Terms, Symbols, and Conversion Factors 3 2-1 Definitions .. 3 2-2 Symbols .. 5 2-3 ConversionFactors 5 2-4 Descriptive Figures . . 5 Section 3 Guiding Principles . . . 15 3-1 Introduction........ 15 3-2 Planning for the Test . .. 15 3-3 Prior Agreements ..... 16 3-4 Test Preparations ..... 17 3-5 Conducting the Test . 18 3-6 Calculation, Analysis, and Reporting of Results 20 Section 4 Instruments and Methods of Measurement 23 4-1 Introduction. 23 4-2 23 4-3 Temperature Measurement . 25 4-4 Pressure Measurement ... 31 4-5 Flow Measurement ........ 37 4-6 Liquid and Gaseous Fuel Sampling . . : 38 4-7 Power Measurement . . . 39 4-8 Data Collection and Handling . . 39 Section 5 Calculations .. . 40 5-1 Introduction. 40 5-2 Intermediate Calculations 40 5-3 Gas Flow by HRSG Energy Balance . 51 5-4 Gas Flow by GT Energy Balance . 54 5-5 Correction of Test Conditions to Guarantee 54 Section 6 Report of Results 58 6-1 Section 1: Executive Summary - 58 ii 6-2 Section 2: Introduction .. 58 6-3 Section 3: Test Data . . 58 6-4 Section 4: Data Reduction, Corrections, and Results 58 6-5 Section 5: Appendices . . 58 Section 7 Test Uncertainty . . 59 7-1 Introduction.. 59 7-2 Principles of an Uncertainty Analysis . 59 7-3 Pretest Uncertainty Analysis . 59 7-4 Post-Test Uncertainty Analysis . 59 7-5 Inputs for an Uncertainty Analysis . 59 7-6 Weighted Capacity . 60 7-7 Additional Considerations 60 Nonmandatory Appendices A Bypass Damper Leakage . 61 B