File(s) not publicly available
A CFD investigation of effects of flow-field geometry on transient performance of an automotive polymer electrolyte membrane fuel cell
journal contribution
posted on 2023-06-08, 22:36 authored by Pattarapong Choopanya, Zhiyin YangA 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
History
Publication status
- Published
Journal
Computational Thermal SciencesISSN
1940-2503Publisher
Begell HouseIssue
2Volume
7Page range
93-104Department affiliated with
- Engineering and Design Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2015-09-24Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC