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1、SendOrdersforReprintstoreprints@benthamscience.aeTheOpenElectrochemistryJournal,2015,6,1-91wOpenAccessModelingandSimulationofBiologicallyInspiredFlowFieldDesignsforProtonExchangeMembraneFuelCellsaaaba,A.Arvay,J.French,J.-C.Wang,X.-H.PengandA.M.Kannan*aFuelCellLaboratory,DepartmentofEngineeringandC
2、omputingSystems,ArizonaStateUniversity,Mesa,AZ85212,USAbSchoolofLettersandSciences,ArizonaStateUniversity,Mesa,AZ85212,USAAbstract:Variousbiologicallyinspiredflowfielddesignsofthegasdistributor(interconnector)havebeendesignedandosimulated.TheirperformanceusingNafion-212withhumidifiedH2andAirat80Cw
3、iththeANSYSFluentFuelCellmodulesoftwarewasevaluated.Novelinterdigitateddesignswereoptimizedbyobeyingbiologicallyinspiredbranchingrules.Theserulesallowformoremathematicallyformaldescriptionsofflowfielddesigns,enablingrelativelysimpleoptimization.Thechanneltolandratiowaskeptequivalentbetweendesignsw
4、ithtypicalvaluesbetween0.8and1.0.Thepressuredropandthecurrentdensitydistributionweremonitoredforeachdesignonbothanodeandcathodesides.Themostpromisingdesignsareexpectedtoexhibitlowerpressuredrophowever,lowpressuredropcanalsobeanindicationofpotentialwaterfloodingathigheroperatingcurrentdensity.Abiol
5、ogicallyinspiredinterdigitateddesignwith9inletchannelsexhibitedreducedpressuredropandimprovedcurrentdensitydistributioncomparedtoallotherinterdigitateddesignsevaluatedinthisstudy.ThesimulatedfuelcellperformancedataatambientpressurewithhumidifiedH2andaircompareswellwiththeexperimentaldatausingasing
6、leserpentineflowfielddesign.Keywords:BiologicallyinspiredFlowfields,Gastransportandpressuredrop,Currentdistribution,Protonexchangemembranefuelcell.1.INTRODUCTIONTheflowfieldmustalsobedesignedtomaintainproperwaterbalancewithinthecell.TheNafionmembraneinaProtonexchangemembranefuelcells(PEMFCs)arePEM
7、FCrequiresmoistureinordertomaintainprotonelectrochemicaldevicesthatconverthydrogenandoxygentoconductivity.Butitisessentialthatexcesswaterformedelectricity,heat,andwater.PEMFCsgeneratethisenergyduringthechemicalre
