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1、302IEEETRANSACTIONSONINDUSTRIALELECTRONICS,VOL.61,NO.1,JANUARY2014DesignandFabricationofHeatStorageThermoelectricHarvestingDevicesMichailE.Kiziroglou,Member,IEEE,StevenW.Wright,TzernT.Toh,PaulD.Mitcheson,SeniorMember,IEEE,Th.Becker,andEricM.Yeatman,Fellow,IEEEAbstractTh
2、ermoelectricenergyharvestingrequiresasub-powerforenergyharvestingdevicesistypicallyintherangestantialtemperaturedifferenceΔTtobeavailablewithinthebetweenmicrowattsandhundredsofmilliwatts[3].Reviewsdevicestructure.Thishasrestricteditsusetoparticularappli-canbefoundinthel
3、iteratureformotion,thermoelectric,andcationssuchasheatenginestructuralmonitoring,whereahotlightenergyharvesting[2],[4]–[7].metalsurfaceisavailable.Analternativeapproachispossibleincaseswhereambienttemperatureundergoesregularvariation.Variousthermoelectricgenerator(TEG)e
4、nergyharvestingThisinvolvesusingaheatstorageunit,whichisfilledwithadeviceshavebeenproposed[4],[8],andsomehavebeenphase-changematerial(PCM),tocreateaninternalspatialtem-commercialized,suchastheSeikoThermicwristwatch[9]andperaturedifferencefromtemperaturevariationintime.In
5、thisMicropeltgenerators[10].Thethermoelectricmaterialsusedpaper,keydesignparametersandacharacterizationmethodologyintheseimplementationsaretelluridealloys,whichtypicallyforsuchdevicesaredefined.Themaximumelectricalenergydensityexpectedforagiventemperaturerangeiscalculate
6、d.ThegiveadimensionlessfigureofmeritZTofaround0.8atroomfabrication,characterization,andanalysisofaheatstoragehar-temperature.ZTisdefinedas[4]vestingprototypedevicearepresentedfortemperaturevariationsofafewtensofdegreesaround0◦C,correspondingtoaircrafta2ZT=T(1)flightconditi
7、ons.Outputenergyof105Jintoa10-ΩmatchedReKresistiveload,fromatemperaturesweepfrom+20◦Cto−21◦C,thento+25◦Cisdemonstrated,using23gofwaterasthewhereReistheelectricalresistance,Kisthethermalconduc-PCM.Theproposeddeviceoffersauniquepoweringsolutionfortance,aistheSeebeckcoeffic
8、ient(definedastheopen-circuitwirelesssensorapplicationsinvolvinglocationswithtemperatureoutputvoltageperKelvino
