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1、JournalofELECTRONICMATERIALS,Vol.39,No.9,2010DOI:10.1007/s11664-010-1305-2Ó2010TMSModelingaThermoelectricGeneratorAppliedtoDieselAutomotiveHeatRecovery1,2,4321N.ESPINOSA,M.LAZARD,L.AIXALA,andH.SCHERRER1.LaboratoiredePhysiquedesMate´riaux,ParcdeSaurupt,Nancy,France.2.RenaultTrucksSAS,99,r
2、outedeLyon,Saint-Priest,France.3.GIPInSIC,27,ruedHellieule,Saint-Die´,France.4.e-mail:nicolas.espinosa@volvo.comThermoelectricgenerators(TEGs)areoutstandingdevicesforautomotivewasteheatrecovery.Theirpackaging,lackofmovingparts,anddirectheattoelectricalconversionarethemainbenefits.Usually,
3、TEGsaremodeledwithaconstanthot-sourcetemperature.However,energyinexhaustgasesislimited,thusleadingtoatemperaturedecreaseasheatisrecovered.Thereforether-moelectricpropertieschangealongtheTEG,affectingperformance.Ather-moelectricgeneratorcomposedofMg2Si/Zn4Sb3forhightemperaturesfollowedbyB
4、i2Te3forlowtemperatureshasbeenmodeledusingengineeringequationsolver(EES)software.Themodelusesthefinite-differencemethodwithastrip-finsconvectiveheattransfercoefficient.Ithasbeenvalidatedonacommercialmodulewithwell-knownproperties.Thethermoelectricconnec-tionandthenumberofthermoelementshaveb
5、eenaddressedaswellastheoptimumproportionofhigh-temperaturematerialforagiventhermoelectricheatexchanger.TEGoutputpowerhasbeenestimatedforatypicalcom-mercialvehicleat90°Ccoolanttemperature.Keywords:Thermoelectricgenerator,modeling,EES,heatrecovery,truckdieselengineNomenclaturenxNumberofthe
6、rmoelementcouplesinthegeneratorVariablesnyNumberofrangesinthegeneratorBThermoelectricgeneratorwidth,mPelecPowerrecoveredasdescribedb1Heightofgaschannelplate,minEq.7,Wb2Heightofwaterchannelplate,mPelec,seriesCalculatedrecoveredpowerwithallcpSpecificheat,J/kg/Kthermoelementsconnectedinseri
7、esandCthThermalconductance,W/Kanadaptedloadconnected,WdxElementarylengthdefinedinFig.3b,mQHeattransferred,WdyElementarywidthdefinedinFig.3b,m2Relec,TEElectricalresistanceofathermoelementhGasheattransfercoefficient,W/m/Kcouple,XICurrent,A2Rth,contThermalcontactresistance,m
