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1、AbstractTheheatexchangerisakindofequipmentforheatexchangeandtheheatfromonemediumtoanothermedium.Applicationofheatexchangerisveryextensive,suchasrefrigeration,mechanical,chemical,aerospaceandtransportationetc..Accordingtothestructureshape,therearemany
2、typesofheatexchanger,theshellandtubeheatexchanger,heatexchanger,finnedtubeheatexchangerandtheregenerativeheatexchanger.Designforfinheatexchangerperformancetestsystemofthispaperfocusesonthestudyofplatefin.Thesystemisconsistofairsupplysystem,thetestsec
3、tion,temperaturecontrolsystem,measurementsystem,andthedataacquisitionandprocessingsystemcomponents-Selectthesystemofinstrumentandcalculationforprecisioninstrument,foundthattheerrortransferfactorandfrictionfactorarenotmorethan5%.UsechemicalsoftwareHYS
4、YStosimulatetheheatexchangerofkeyparameters.Testparametersoftheheatexchangerinsmallwaterflowandlargewaterflow.Whentesting,theiTnalequilibriuminthesmallwaterflowtestingofairsideandwaterside,andthenincreasethewaterflow,theapproximateformofconstantwallt
5、emperaturecondition.Adoptvariablepropertiesonair,fittingthephysicalparameterschangewithtemperatureandpressuretype.Inthecalculationofheattransferfactorandtheresistancefactorwhencomparedtothepreviousthefinefficiency,Iadoptthevariablefinefficiency,becau
6、sethefinefficiencyandtheparametersoftheheatexchanger.UseMatlabprogrammingtoiterativeexperimentalconditionsatthetimeofthefinefficiency.Calculatethetotalheattransfercoefficientoftheheatexchangerefficiencynumberoftransferunits,thenumberofheattransferuni
7、tswithheatcapacityratioandtherelationshipbetweentheefficiencyofheatexchangertype.Duringtheexperiment,theairsideheattransferresistanceisaccountedformostofthetotalthermalresistance,sothethermalseparationprocesstotheairsideheattransfercoefficientissepar
8、atedfromthetotalheattransfercoefficientwithhighprecision.Keywords:Testingsystemofplate-finheatexchanger,physicalparameters,heattransferfactor,firictionfactor,thefinefficiency,heattransfercoefficient.目录摘要IAbstractII1绪论11.1选题背景与意义11.2板翅式换热器的结构21.3国内外研究
