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Through-Plane Gas Permeability of Proton Exchange Membrane Fuel Cell Gas Diffusion Layers

[+] Author Affiliations
A. Tamayol, F. McGregor, M. Bahrami

Simon Fraser University, Surrey, BC, Canada

Paper No. FuelCell2011-54257, pp. 591-600; 10 pages
doi:10.1115/FuelCell2011-54257
From:
  • ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability
  • ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology
  • Washington, DC, USA, August 7–10, 2011
  • Conference Sponsors: Advanced Energy Systems Division
  • ISBN: 978-0-7918-5469-3
  • Copyright © 2011 by ASME

abstract

Effects of mechanical compression and PTFE content on the through-plane gas permeability of gas diffusion layers (GDLs) of PEM fuel cells are investigated both experimentally and theoretically. A new test bed is designed and built which allows pressure drop and air flow rate measurement for various fibrous samples. The measured values are used to calculate the through-plane permeability. Various GDLs are obtained and tested over a wide range of PTFE content and compression ratio. The experimental data shows a reverse relationship between the through-plane permeability and both PTFE content and mechanical compression. An existing model for through-plane permeability of planar structures is revisited to develop a model that accommodates effects of PTFE content and GDL compression. The proposed model captures the trends of the experimental data for through-plane permeability, measured in the present study or reported by others.

Copyright © 2011 by ASME

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