C-6S_R2003_E1988.pdf

Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.REAFFIRMED 2003FOR CURRENT COMMITTEE PERSONNELPLEASE E-MAIL CSasme.orgProcedures for Routine Performance Tests of Steam Turbines(Not Intended for Acceptance Testing)ASME PTC 6s Report-1988 REVISION OF ASME PTC 65 REPORT-1970(R1985)I PERFORMANCE TEST CODES T H E A M E R I C A N S O C I E T Y OF M E C H A N I C A L ENGINEERS United Engineering Center 345 East 47th Street NewYork,N.Y.10017 Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of issuance:December 15,1989 This document will be revised when the Society approves the issuance of the next edition,scheduled for 1992.There will be nlo Addenda issued to PTC 6s Report-1988.Please Note:ASME issues written replies to inquiries concerning interpretation of technicai aspects of this document.PTC 6s Report-1988 is being issued with an automatic subscription service to the interpretations that will be issued tu it up to the publication of the 1992 Edition.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American National Standards.The Consensus 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 comment which provides an opportunity for additional pu:blic input from industry,academia,regulatory agencies,and the public-at-large.ASME does not approve,rate,or endorse any item,c:onstruction,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 document,and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent,nor assume any such liability.Users of a code or standard are expressly advised that 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 code or standard.ASME accepts responsibility for only those interpretations issued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by individual vol-unteers.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.Copyright 0 1989 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in the U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.FOREWORD(This Foreword is not part of ASME PTC 6s Report-1988.)Users of both large and small turbines haveexperienced an increasing need for procedures for routine turbine tests which trend performance with time.The use of full-scale ASME Per-formance Test Code procedures and instrumentation for this purpose is expensive and pro-duces information and accuracy beyond that necessary for periodic monitoring.When ASME Performance Test Code Committee No.6 was reorganized to revise PTC 6-1 949,it was charged also with developing simplified procedures for periodic tests.Because of the routine nature of the tests,these procedures were to emphasize repeatability of results rather than absolute accuracy and thus provide a more economic means of monitoring perfor-mance trends.This Report reflects the consensus of knowledgeable engineers and contains recom-mended procedures for collecting sufficiently accurate data to permit analyses of perfor-mance trends.Recommendations are given which include advance planning,cycle isola-tion,and suggested presentation of results.Emphasis is placed upon the use of accurate in-strumentation,approaching measurement uncertainties required by the Code,for the measurement of critical variables that are part of the heat-rate equation.Other instrumenta-tion is specified to produce results of good accuracy and of a high degree of repeatability.With the application of automatic data-loggingand on-line computer systems to the plant cy-cle,the procedures presented in this Report,when applied to this end,should satisfy the needs of users of both large and small turbines.Procedures recommended in this Report are not intended to produce abolute levels of p