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The impact of flow field pattern on concentration and performance in PEMFC

✍ Scribed by A. Su; Y. C. Chiu; F. B. Weng

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
982 KB
Volume
29
Category
Article
ISSN
0363-907X

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✦ Synopsis

In this study, we present a rigorous mathematical model, to treat prediction and analysis of proton exchange membrane fuel cells gas concentration and current density distribution in mass transfer area and chemical reaction area performed in 3-D geometry. The model is based on the solution of the conservation equations of mass, momentum, species, and electric current in a fully integrated finite-volume solver using the CFDRC commercial code. The influences of fuel cell performance with two kinds of flow channel pattern design are studied. The gas concentration of the straight flow pattern appears excessively nonuniform, resulting in a local concentration polarization. On the other hand, the gas concentration is well distributed for the serpentine flow pattern, creating a better mass transfer phenomena. The performance curves (polarization curves) are also well correlated with experimental data.

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