pem燃料電池流場板及電池堆流體流動分布的研究

1、天津大學碩士學位論文PEM燃料電池流場板及電池堆流體流動分布的研究姓名：任茂賓申請學位級別：碩士專業(yè)：化學工程指導教師：王宇新20021201ABSTRACTFuelcell(FC)isrecognizedasanewalternativetothepresentpowerSOUrCesbecauseofitscharacteristicsofhighefficiencylowemission，highenergyandpowerden

2、sityFlowfieldplateisanimportantpartinFC，whichdistributesfuelandoxidantforFCandprovideselectronicconnectionbetweensinglecellsItscostaccountsforabout40％ofthewholecostofFC，whilethehighcostofFCisakeyobstacletOitswideapplicat

3、ionInaddition，manysinglecellshavetObeconnectedinseriestOformastack，tomakeapracticalFCpowersourceTheperformanceofaFCstacknotonlydependsonthematerialsandfabricationofallsinglecells，butalsogreatlyaffectedbythedistributionof

4、ruelandoxidanttoeachcellWiththeabovebackground，newmaterialsandmanufacturingmethodsforflowfieldplatesareexploredandflowprofileinFCstackareanalyzedinthisthesisThestudybeganwithgraphitematerialresearchandtheeffectofexpandin

5、gtemperature，expandingdegreeandexpandingtimeontheplate’selectricalresistancewereinvestigatedCompositegraphitematerialswerealsoprocessedandutilizedtomakeflowfieldplatesInvestigationsoftherelationbetweenplates’resistancean

6、ditsprocessingconditionswerecarriedoutAmethodofone—steppressmoldinginproducingflowfieldplateswasproposedTheresultingplatesweretestedinrealPEMfuelcellsandcomparedwiⅡ1platesfromothermaterialsanddifferentprocessesByadopting

7、，PhoenixacommercialcomputersoftwareforhydrodynamicscalculationflowdistributionofliquidmethanolsolutionindirectmethanolfuelceIl(DMFC)stacksweresimulatedAnumberoffactorsincludingcellnumberflowvelocityandchanneldimensionswe

8、reanalyzedwimrespecttotheirinfluenceontheevennessofflowindifferentcellsMeansofunifyingflowinfuelcellstackswereproposedbasedonsimulationresultsEncouragingresultsareachievedinregardtotheproposedflexiblegraphiteflowfieldpla

9、teItpresentedfuelcellperformanceandthepotentialofmuchlowercostwhencomparedwithconventionalflowfieldplateofhardgraphiteThiswillhelptomakefuelcellmoreeconomicallycompetitiveTheestablishedmethodofsimulatingtheflowbehaviorin