Effects of operating parameters on transport phenomena and cell performance of PEM fuel cells with conventional and contracted flow field designs

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)15808-15819
Journal / PublicationInternational Journal of Hydrogen Energy
Volume37
Issue number20
Publication statusPublished - Oct 2012
Externally publishedYes

Abstract

A contracted parallel flow field design was developed to improve fuel cell performance compared with the conventional parallel flow field design. A three-dimensional model was used to compare the cell performance for both designs. The effects of the cathode reactant inlet velocity and cathode reactant inlet relative humidity on the cell performance for both designs were also investigated. For operating voltages greater than 0.7 V because the electrochemical reaction rates are lower with less oxygen consumption and less liquid water production, the cell performance is independent of the flow field designs and operating parameters. However, for lower operating voltages where the electrochemical reaction rates gradually increase, the oxygen transport and the liquid water removal efficiency differ for the various flow field designs and operating parameters; therefore, the cell performance is strongly dependent on both the design and operating parameters. For lower operating voltages, the cell performance for the contracted design is better than for the conventional design because the reactant flow velocities in the contracted region significantly increase, which enhances liquid water removal and reduces the oxygen transport resistance. For lower operating voltages, as the cathode reactant inlet velocity increases and the cathode reactant inlet relative humidity decreases, the cell performance for both designs improves. © 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

Research Area(s)

  • Cell performance, Contracted flow field design, Parallel flow field design, PEMFC

Bibliographic Note

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Citation Format(s)

Effects of operating parameters on transport phenomena and cell performance of PEM fuel cells with conventional and contracted flow field designs. / Wang, Xiao-Dong; Yan, Wei-Mon; Won, Wen-Chung et al.
In: International Journal of Hydrogen Energy, Vol. 37, No. 20, 10.2012, p. 15808-15819.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review