BS EN 14705-2005 热交换器.湿冷却塔热性能的评价和测量方法

BRITISHSTANDARDBSEN14705:2005Heatexchangers—MethodofmeasurementandevaluationofthermalperformancesofwetcoolingtowersTheEuropeanStandardEN14705:2005hasthestatusofaBritishStandardICS27.060.30;27.200  BSEN14705:2005ThisBritishStandardwaspublishedundertheauthorityoftheStandardsPolicyandStrategyCommitteeon28July2005©BSI28July2005ISBN0580464067NationalforewordThisBritishStandardistheofficialEnglishlanguageversionofEN1274:2005.TheUKparticipationinitspreparationwasentrustedtoTechnicalCommitteeRHE/30,Heatexchangers,whichhastheresponsibilityto:—aidenquirerstounderstandthetext;—presenttotheresponsibleinternational/Europeancommitteeanyenquiriesontheinterpretation,orproposalsforchange,andkeeptheUKinterestsinformed;—monitorrelatedinternationalandEuropeandevelopmentsandpromulgatethemintheUK.Alistoforganizationsrepresentedonthiscommitteecanbeobtainedonrequesttoitssecretary.Cross-referencesTheBritishStandardswhichimplementinternationalorEuropeanpublicationsreferredtointhisdocumentmaybefoundintheBSICatalogueunderthesectionentitled“InternationalStandardsCorrespondenceIndex”,orbyusingthe“Search”facilityoftheBSIElectronicCatalogueorofBritishStandardsOnline.Thispublicationdoesnotpurporttoincludeallthenecessaryprovisionsofacontract.Usersareresponsibleforitscorrectapplication.CompliancewithaBritishStandarddoesnotofitselfconferimmunityfromlegalobligations.SummaryofpagesThisdocumentcomprisesafrontcover,aninsidefrontcover,theENtitlepage,pages2to62,aninsidebackcoverandabackcover.TheBSIcopyrightnoticedisplayedinthisdocumentindicateswhenthedocumentwaslastissued.AmendmentsissuedsincepublicationAmd.No.DateCommentsEUROPEANSTANDARDNORMEEUROPÉENNEEUROPÄISCHENORMEN14705June2005ICS27.060.30;27.200EnglishversionHeatexchangers-MethodofmeasurementandevaluationofthermalperformancesofwetcoolingtowersEchangeursdechaleur-MéthodedemesureetévaluationdesperformancesthermiquesdesaéroréfrigérantshumidesWärmeaustauscher-VerfahrenzurMessungundBewertungderwärmetechnischenLeistungskenndatenvonNasskühltürmenThisEuropeanStandardwasapprovedbyCENon24March2005.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusastheofficialversions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,Slovakia,Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom.EUROPEANCOMMITTEEFORSTANDARDIZATIONCOMITÉEUROPÉENDENORMALISATIONEUROPÄISCHESKOMITEEFÜRNORMUNGManagementCentre:ruedeStassart,36B-1050Brussels©2005CENAllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENnationalMembers.Ref.No.EN14705:2005:EEN14705:2005(E)2ContentspageForeword..........................................................................................................................................................31Scope...................................................................................................................................................42Normativereferences.........................................................................................................................43Terms,definitionsandsymbols........................................................................................................53.1Termsanddefinitions.........................................................................................................................53.2Symbols...............................................................................................................................................74Performancetests–General............................................................................................................115Guarantee..........................................................................................................................................125.1General..............................................................................................................................................125.2Guaranteedocuments......................................................................................................................125.3Validityconditionsformeasurements............................................................................................136Testprocedure..................................................................................................................................156.1Testparameters......................