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1、InternationalJournalofRefrigeration25(2002)1102–1109www.elsevier.com/locate/ijrefrigMeasurementandpredictionofairmovementthroughdoorwaysinrefrigeratedroomsA.M.Fostera,*,R.Barrettb,S.J.Jamesa,M.J.SwainaaFRPERC,UniversityofBristol,ChurchillBuilding,Langford,Bris
2、tol,BS405DU,UKbDepartmentofAeronauticalEngineering,UniversityofBristol,QueensBuilding,UniversityWalk,Bristol,BS81TR,UKReceived12May2001;receivedinrevisedform25October2001;accepted16November2001AbstractReducingtheamountofairinfiltrationthroughthedoorwaysoffoodst
3、orageroomswouldimprovetemperaturecontrolandtheoveralleconomicsoffoodstorage.IntheUKajointgovernment/industrysupportedLINKprojecthasbeensetuptolookatmethodsofreducingairinfiltration.Theprojectiscombiningdirectexperimentalmeasurementwithcomputationalfluiddynamics(
4、CFD)modelling.ACFDmodelofairmovementthroughadoorwayhasbeendevelopedandverifiedagainstconventionalandlaserDoppleranemometry(LDA)measurements.TheCFDmodelhasbeenshowntobegenerallyaccurate,however,thereareareaswheretheaccuracyislessthanperfect.ForexampletheCFDmodel
5、predictedtheshapeoftheverticalprofileaccurately,althoughitunder-predictedthemaximumvelo-cityby0.1ms1anditpredictedtheheightatwhichtheairflowchangeddirectiontobe40mmlowerthanwasmea-suredbytheLDA.#2002ElsevierScienceLtdandIIR.Allrightsreserved.Keywords:Coldstore;
6、Door;Air;Convection;Measurement;ModellingChambresfroides:mesuresetpre´visionsdese´coulementsd’airlorsdesouverturesdeportesMotscle´s:Chambrefroide;Porte;Air;Convection;Mesure;Mode´lisation1.IntroductionImprovementsininsulation,lowheatlightingandrefrigerationcon
7、trolsystemshaveallowedconsiderableAreductionof1or2Cintheaveragestoragetem-advancestobemadeintemperaturemaintenance.How-peratureofchilledfoodscansignificantlyincreasefoodever,inanyrefrigeratedstore,entrancesarerequiredforquality.Bacterialcountswilldecrease,lead
8、ingtoanloadingandunloadingrawmaterialsorfinishedproductsincreaseinsafetyandshelflifeoftheproduct.Theweightandtheyareamajorsourceofheatinfiltration.lossfromunwrappedfoodswillreducethu
