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A CFD INVESTIGATION OF EFFECTS OF FLOW-FIELD GEOMETRY ON TRANSIENT PERFORMANCE OF AN AUTOMOTIVE POLYMER ELECTROLYTE MEMBRANE FUEL CELL

Volume 7, Issue 2, 2015, pp. 93-104
DOI: 10.1615/ComputThermalScien.2015012298
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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.

CITED BY
  1. Andersson M., Beale S.B., Espinoza M., Wu Z., Lehnert W., A review of cell-scale multiphase flow modeling, including water management, in polymer electrolyte fuel cells, Applied Energy, 180, 2016. Crossref

  2. Choopanya P., Yang Z., An effective mesh strategy for CFD modelling of polymer electrolyte membrane fuel cells, International Journal of Hydrogen Energy, 41, 15, 2016. Crossref

  3. Kone Jean-Paul, Zhang Xinyu, Yan Yuying, Hu Guilin, Ahmadi Goodarz, Three-dimensional multiphase flow computational fluid dynamics models for proton exchange membrane fuel cell: A theoretical development, The Journal of Computational Multiphase Flows, 9, 1, 2017. Crossref

  4. Hazar Hanbey, Yilmaz Mustafa, Sevinc Huseyin, The effects of different flow field patterns on polymer electrolyte membrane fuel cell performance, Energy Conversion and Management, 248, 2021. Crossref

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