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Energies 2016, 9(4), 229; doi:10.3390/en9040229

Gas-Phase Mass-Transfer Resistances at Polymeric Electrolyte Membrane Fuel Cells Electrodes: Theoretical Analysis on the Effectiveness of Interdigitated and Serpentine Flow Arrangements

Department of Civil, Chemical and Environmental Engineering; University of Genoa, Via Opera Pia 15, Genoa -16145, Italy
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Author to whom correspondence should be addressed.
Academic Editor: Jinliang Yuan
Received: 30 December 2015 / Revised: 10 March 2016 / Accepted: 15 March 2016 / Published: 23 March 2016
(This article belongs to the Special Issue Reacting Transport Phenomena in Electrochemical Cells)
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Abstract

Mass transfer phenomena in polymeric electrolyte membrane fuel cells (PEMFC) electrodes has already been analyzed in terms of the interactions between diffusive and forced flows. It was demonstrated that the whole phenomenon could be summarized by expressing the Sherwood number as a function of the Peclet number. The dependence of Sherwood number on Peclet one Sh(Pe) function, which was initially deduced by determining three different flow regimes, has now been given a more accurate description. A comparison between the approximate and the accurate results for a reference condition of diluted reactant and limit current has shown that the former are useful for rapid, preliminary calculations. However, a more precise and reliable estimation of the Sherwood number is worth attention, as it provides a detailed description of the electrochemical kinetics and allows a reliable comparison of the various geometrical arrangements used for the distribution of the reactants. View Full-Text
Keywords: transport phenomena; modeling; polymeric membrane fuel cells; gas flow mode transport phenomena; modeling; polymeric membrane fuel cells; gas flow mode
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Arato, E.; Pinna, M.; Mazzoccoli, M.; Bosio, B. Gas-Phase Mass-Transfer Resistances at Polymeric Electrolyte Membrane Fuel Cells Electrodes: Theoretical Analysis on the Effectiveness of Interdigitated and Serpentine Flow Arrangements. Energies 2016, 9, 229.

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