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微型换热器的实验研究 :对微槽式微型换热器和烧结网丝多孔式微型换热器的传热与流动性能进行了实验研究,并对几种微型换热器的综合性能进行了评价。结果表明:根据单位体积传热系数的大小,几种微型换热器的传热性能从好到差依次为:烧结颗粒多孔式微型换热器、浅槽微型换热器、深宽比为3∶1的深槽微型换热器、烧结网丝多孔式微型换热器、深宽比为6∶1的深槽微型换热器。但烧结颗粒及烧结网丝多孔式微型换热器的压力损失比较大;从传热和阻力损失两个方面综合评价,深槽结构微型换热器优于其他几种微型换热器。:深槽结构微型换热器;网丝多孔式微型换热器;传热性能;流动阻力:TK124 :A :1001-4837(2003)02-0008-05ExperimentalResearchonMicroHeatExchangersTsinghuaUniversity JIANGPei-xue LIMeng MAYong-chang RENZe-peiAbstract:Fluidflowandforcedconvectionheattransferinmicroheatexchangerswitheithermicrochannelsorsinteredmetallicmeshhavebeeninvestigatedexperimentallyandtheestimationoftheoverallperformancehasbeenconducted.Theresultsindicatedthattheheattransferperformanceofthesinteredporousmediamicroheatexchangerisbest,theheattransferperformancefollowedbytheshallowchannelmicroheatexchanger,thenthedeepchannelmicroheatexchangerwithratio3∶1ofdeepnesstowidthofthechannel,thesinteredmetalmeshheatexchanger,andthedeepchannelmicroheatexchangerwithratio6∶1ofdeepnesstowidthofthechannel.Butthepressuredropoftheheatexchangersusingsinteredmetallicparticlesandsinteredmetalmesharemuchlarger.Consideringbothoftheheattransferandpressuredropcharacteristicsoftheseheatex-changers,thedeepmicrochanneldesignoffersabetteroverallperformancethanotheralternatives.Keywords:deepchannelmicroheatexchanger;sinteredmetalmeshheatexchanger;heattransfer;pressuredrop 1 、,、、、、、、、,。,,,MW/(m3K),1～2。,、,, :(50025617)。·8·,“”;,、。Tucker-manPease1981“”,。,70℃,1300W/cm2。,。Swift、MiglioriWheatley1985。(1)。(1)。;,。1998[1、2],300.7mm,、0.2mm、0.6mm0.2mm;0.34kg/s38.5MW/(m3K),13.3kW/(m2K),1～2,0.9bar。,,。[3、4]。[5],:、,,。1998,,,300.7mm,21×21×26mm。0.272mm,67g/s,KV86.3MW/(m3K),KF60.4kW/(m2K),4.66bar。,,,;,。,。,,,。,,。,。 2 1。、、、、、(、Keithley2700、PC)、、。。,;,,。,,。。1 1、;2、;3、;4、;5、Keithley2700;6、PC;7、;8、;9、;10、;11、;12、。,:(LIGA)、(EDM)、、(ECM)、、、。。、,。。()::0.2mm;:1.2mm(6∶1);():0.2mm;():0.1mm;:1.3mm;:21.0mm;():15.0mm;:38;:16;:2728m2/m3。[11、12、16],·9·202 123、,,,、,。。。。、,。,,。,。::15.0mm;:2.3mm;():0.3mm;:2.6mm;:16×16;:21.0mm;():15.0mm;:8;:0.85。、,。[6、7]。:、、,、。0.2mm—。、,、,。。、0.25、0.1MPa0.6MPa。[1、2、6、7]。,5.0%。,。±0.2℃。1.8%。0.017bar。:、、、、±16.9%、±17.4%、±17.9%、±20.7%、±21.0%;9.0%、9.0%、9.1%、9.2%、13.1%。,;,±12.6%、4.7%。 3 3.1 微槽式微型换热器2。3∶1[1、2]。,。,。2 3、,KVG。0.257kg/s,4.73m/s,20.2MW/(m3K),7.42kW/(m2K)。33∶1[1、2]KVG。,,3∶16∶1,。,。3 3.2 多孔式微型换热器4。0.031kg/s0.18kg/s,0.193～1.10m/s,0.08bar·10·CPVT Vol20.No220031.90bar。4[1、2]。;,,。,85%。4 5KVG。,[1、2]。KV,,,。,180g/s,KV16.5MW/(m3K)。,3∶1,6∶1,。,,,。(16×16,85%,,500×500),。。,,,、。,。35::、3∶1、、6∶1、6∶1。5 24:,,、3∶1、6∶1。,,。6(6∶1、)[1、2]3∶1。。KV/ΔP,6∶1,。6 [7],,KV/ΔP,,KV/ΔP。,。,·11·202 123,。,:,,,;,[2]。,。,。,。0.2mm(),,。、,。 4 (1),,;,;(2),,;,。。[1] ,,.[A].1998[C]..1998(8):204-211.[2] Pei-xueJiang,Ming-hongFan,Guang-shuShiandZe-peiRen.Thermal-HydraulicPerformanceofSmallScaleMicrochannelandPorousMediaHeatExchangers[J].Interna-tionalJournalofHeatandMassTransfer.2001,44(5):1039-1051.[3] JeigarnikU.A.,IvanovF.P.andIkranikovN.P.,1991.ExperimentalDataonHeatTransferandHydraulicResistanceinUnregulatedPorousStructures(inRussian)[J].Teploener-getika,(2):33-38.[4] JiangPei-xue,WangZhan,RenZe-peiandWangBu-xuan.ExperimentalResearchofForcedConvectionHeatTransferinPlateChannelFilledwithGlassorMetallicparti-cles[J].ExperimentalThermalandFluidScience.1999,20(1):45-54.[5] ,,.[J].,1996,17(3):328-332.[6] .[D].,1998.[7] .[D].,2002.[8] Kays,W.M.,andLondon,A.L.,,,[M],,1997.[9] ,,.[M].,,1996.[10] Aerov,M.E.,andTojec,O.M.,1968,HydraulicandThermalBasisonthePerformanceofApparatuswithStation-aryandBoilingGranularLayer.(inRussian),Leningrad,HimiaPress.:2003-01-02:,,1964,,、,、。:,:100084。·2003520～23,。300,750,,、、,;“”;“”;“”,。:028—83250690、83249861、83276682。·12·CPVT Vol20.No22003