Analysis on a Dynamic Model with One Dimension in Water Transportation of PEM Fuel Cell
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초록
Waterbalancehasa significantimpacton theoverallfuelcellperformance.Maintenanceofproperwater managementshouldprovideanadequatemembranehydrationandavoidanceofwaterfloodinginthecatalystlayer andgasdiffusionlayer.ConsideringtheimportantofadvancedwatermanagementinPEM fuelcell,thisstudy proposesasimpleonedimensionalwatertransportationmodelofPEM fuelcellforuseinadynamiccondition. Themodelhasbeencreatedbyassumptionthattheoutputisthewaterliquidsaturationdifference.Theliquid saturationchangeisthetotaldifferencebetweentheadditionalwaterandtheremovalwateronthesystem.The wateradditionisobtainedfrom fuelcellreactionandtheelectroosmoticdrag.Thewaterremovalisobtainedfrom capillarytransportandevaporationprocess.Theresultshowsthatthecapillarywatertransportoflow temperature fuelcellishighbecausetheevaporationrateislow.
Abstract
Waterbalancehasa significantimpacton theoverallfuelcellperformance.Maintenanceofproperwater managementshouldprovideanadequatemembranehydrationandavoidanceofwaterfloodinginthecatalystlayer andgasdiffusionlayer.ConsideringtheimportantofadvancedwatermanagementinPEM fuelcell,thisstudy proposesasimpleonedimensionalwatertransportationmodelofPEM fuelcellforuseinadynamiccondition. Themodelhasbeencreatedbyassumptionthattheoutputisthewaterliquidsaturationdifference.Theliquid saturationchangeisthetotaldifferencebetweentheadditionalwaterandtheremovalwateronthesystem.The wateradditionisobtainedfrom fuelcellreactionandtheelectroosmoticdrag.Thewaterremovalisobtainedfrom capillarytransportandevaporationprocess.Theresultshowsthatthecapillarywatertransportoflow temperature fuelcellishighbecausetheevaporationrateislow.
참고문헌 (3)
- Pasaogullari U., , J. Electrochem. Soc, 151, pp.399~406 (2004)
- Mao L., , J. Electrochem. Soc, 154, pp.139~146 (2007)
- G. Hoogers, "Fuel Cell Technology Handbook" (2003), CRC Press