螺旋隔板花瓣管水冷冷凝器的传热强化研究

3R407C,,3000W/(m2K),R407CR407CStudyonheattransferenhancementofwatercoolingpetal2shapedfintubecondenserwithhelicalbafflesByZhangZhengguoandFangXiaomingAbstractStudiestheheattransfercharacteristicsofR407Cinpetal2shapedfintubecondenserwithhelicalbaffles.Undertheexperimentalcondition,thetotalheattransfercoefficientofthecondenserreachedtoover3000W/(m2K),provingthatthistypeofcondensercanmarkedlyenhancethecondensationheattransferofR407C.KeywordsR407C,petal2shapedfintubecondenserwithhelicalbaffles,heattransferenhancementSouthChinaUniversityofTechnology,Guangzhou,China0R22,,R22,R407CR22[13]R407C,,,,,,,R407C,,GabrieliiVamlingR407C,,R2243%70%[4]Gino,R407C2000W/(m2K),R22[5]3(:99-Z-105-01)R407C[6],111R407C,,,,21//(kg/s)38.641.20.020.08,,;,75HV&AC2003336,,19684,,510640(020)97112997E2mail:[e-mail]:20010615t,p12,Agilent(34970A)()2(2%),Q:Q=vcp(to-ti)(1)v;cp;;ti;to(1),Q:Q=KAotmK=QAotm(2)Ao,Ao=Ndol;(3)tm,tm=(t-ti)-(t-to)lnt-tit-to(4)(4)t,K4.5%33,,,,3000W/(m2K),,[5]3qKR407C,R407C,,,;,,,,,,,,,,[7],40kPa4R407C,R407CR221.R407CR22.,1999,31(2):1341372BoissieuxX,HeikalMR,JohnsRA.Two2phaseheattransfercoefficientsofthreeHFCrefrigerantsinsideahorizontalsmoothtube.InternationalJofRefrigeration,2000,23(5):3453523CavalliniA,DelDolD,DorettiL,etal.Pressuredropduringcondensationandvaporizationofrefrigerantsinsideenhancedtubes.HeatTechnology,1997,15(1):3104CecilliaG,LennartV.ReplacementofR22intube2and2shellcondensers:experimentsandsimulations.InternationalJofRefrigeration,1997,30(2):1651785BoccardiG,CelataGP,CumoM,etal.Alternativerefrigerantsperformanceinplateheatcondensersforairconditioning.InternationalConferenceonCompactHeatExchangersandEnhancementTechnologyfortheProcessIndustries,19996,,..:ZL99236801.47KrishnanSC,BashirIM,JohnRT,etal.Helixchangerheatexchanger:singlephaseandtwo2phaseenhancement.InternationalConferenceonCompactHeatExchangersandEnhancementTechnologyfortheProcessIndustries,199985HV&AC2003336