ASME_PTC-10-1997.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.ASME PTC 1 O-1 997 Performance Test Code on Compressors and Exhausters 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:September 30,1998 This document will be revised when the Society approves the issuance of a new edition.There will be no addenda issued to ASME PTC 10-1997.Please Note:ASME issues written replies to inquiries concerning interpretation of technical aspects of this document.The interpretations are not part of the document.PTC lo-1997 is being issued with an automatic subscription service to the interpreta-tions that will be issued to it up to the publication of the next 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 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 comment which 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 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 volunteers.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.The American Society of Mechanical Engineers Three Park Avenue,New York,NY 10016-5990 Copyright 0 1998 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in 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 a part of ASME PTC 10-1997.)PTC 10 was last revised in 1965 and it has been reaffirmed many times in the intervening period.The PTC 10 Committee has been in various states of activity for approximately the past 20 years.During that time the Code has been completely rewritten to be far more explanatory in nature.The performance testing of compressors is complicated by the need in virtually every case to consider and make correction for the differences between the test and specified conditions.The techniques used to do so are based upon the rules of fluid-dynamic similarity.Some familiarity with this fundamental technique will be a significant aid to the users of PTC 10.Compressors and exhausters come in all sorts of configurations.A very simple case is a single section compressor with one impeller,and single inlet and outlet flanges.Many more complex arrangements exist with multiple inlets,outlets,impellers,sections,in-tercoolers and side seams.Typical gases handled are air,its constituents,and various hydrocarbons.Tests are commonly run in the shop or in the field,at speeds equal to or different from the specified speed,and with the specified or a substitute gas.In order to handle this vast array of possibilities PTC 10 reduces the problem to the simplest element,the section,and provides the instructions for combining multiple sections to compute the overall results.Uncertainty analysis can play a very important role in compressor testing,from the design of the test to interpretation of the test results.In all but the very simplest of cases the development of an analytic formulation,i.e.,in simple equation form,for overall uncertainty computation is formidable.The test uncertainty will always be increasingly more complex to evaluate with the complexity of the compressor configuration,and by the very nature of the test will be a function of the perform