A CFD investigation of effects of flow-field geometry on transient performance of an automotive polymer electrolyte membrane fuel cell

Hdl Handle:
http://hdl.handle.net/10545/620618
Title:
A CFD investigation of effects of flow-field geometry on transient performance of an automotive polymer electrolyte membrane fuel cell
Authors:
Choopanya, Pattarapong; Yang, Zhiyin ( 0000-0002-6629-1360 )
Abstract:
A three-dimensional, multispecies, multiphase polymer electrolyte (PEM) fuel cell model was developed in order to investigate the effect of the flow-field geometry on the steady-state and transient performances of the cell under an automotive operation. The two most commonly used designs, parallel and single-serpentine flow fields, were selected as they offer distinctive species transport modes of diffusion-dominant and convection-dominant flows in the porous layers, respectively. It was found that this difference in flow mode significantly effects membrane hydration, the key parameter in determining a successful operation. In a steady run, a serpentine flow field increased the averaged current density under the wet condition due to superior water removal, but this had a negative effect on the cell in the way that it caused membrane dry-out if dry reactant gases were used. The transient operation, on the other hand, seemed to favor the combination of a serpentine flow field and dry reactant gases, as it helped in the removal of product water and speeded up the transport of reacting species to the reactive site to find equilibrium at the new state with minimum time delay and current overshoot or undershoot, which is the most important aspect of a dynamic system.
Affiliation:
University of Derby; University of Sussex
Citation:
Choopanya, P. and Yang, Z. (2015) A CFD investigation of effects of flow-field geometry on transient performance of an automotive polymer electrolyte membrane fuel cell, Computational Thermal Sciences: An International Journal, 7 (2) DOI: 10.1615/ComputThermalScien.2015012298
Publisher:
Begell House
Journal:
Computational Thermal Sciences: An International Journal
Issue Date:
2015
URI:
http://hdl.handle.net/10545/620618
DOI:
10.1615/ComputThermalScien.2015012298
Additional Links:
http://www.dl.begellhouse.com/journals/648192910890cd0e,07813a144522093c,14fc653a6601adb7.html
Type:
Article
Language:
en
ISSN:
1940-2503
Appears in Collections:
Department of Mechanical Engineering & the Built Environment

Full metadata record

DC FieldValue Language
dc.contributor.authorChoopanya, Pattarapongen
dc.contributor.authorYang, Zhiyinen
dc.date.accessioned2016-10-17T13:58:55Z-
dc.date.available2016-10-17T13:58:55Z-
dc.date.issued2015-
dc.identifier.citationChoopanya, P. and Yang, Z. (2015) A CFD investigation of effects of flow-field geometry on transient performance of an automotive polymer electrolyte membrane fuel cell, Computational Thermal Sciences: An International Journal, 7 (2) DOI: 10.1615/ComputThermalScien.2015012298en
dc.identifier.issn1940-2503-
dc.identifier.doi10.1615/ComputThermalScien.2015012298-
dc.identifier.urihttp://hdl.handle.net/10545/620618-
dc.description.abstractA three-dimensional, multispecies, multiphase polymer electrolyte (PEM) fuel cell model was developed in order to investigate the effect of the flow-field geometry on the steady-state and transient performances of the cell under an automotive operation. The two most commonly used designs, parallel and single-serpentine flow fields, were selected as they offer distinctive species transport modes of diffusion-dominant and convection-dominant flows in the porous layers, respectively. It was found that this difference in flow mode significantly effects membrane hydration, the key parameter in determining a successful operation. In a steady run, a serpentine flow field increased the averaged current density under the wet condition due to superior water removal, but this had a negative effect on the cell in the way that it caused membrane dry-out if dry reactant gases were used. The transient operation, on the other hand, seemed to favor the combination of a serpentine flow field and dry reactant gases, as it helped in the removal of product water and speeded up the transport of reacting species to the reactive site to find equilibrium at the new state with minimum time delay and current overshoot or undershoot, which is the most important aspect of a dynamic system.en
dc.language.isoenen
dc.publisherBegell Houseen
dc.relation.urlhttp://www.dl.begellhouse.com/journals/648192910890cd0e,07813a144522093c,14fc653a6601adb7.htmlen
dc.rightsArchived with thanks to Computational Thermal Sciences: An International Journalen
dc.subjectPEM fuel cellen
dc.subjectFlow-field geometryen
dc.subjectComputational fluid dynamics (CFD)en
dc.subjectDynamic responseen
dc.subjectOvershooten
dc.subjectUndershooten
dc.subjectCurrent responseen
dc.subjectStep changeen
dc.titleA CFD investigation of effects of flow-field geometry on transient performance of an automotive polymer electrolyte membrane fuel cellen
dc.typeArticleen
dc.contributor.departmentUniversity of Derbyen
dc.contributor.departmentUniversity of Sussexen
dc.identifier.journalComputational Thermal Sciences: An International Journalen
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