In-situ measurements of GDL effective permeability and under-land cross-flow in a PEM fuel cell

Hidetaka Taira, Hongtan Liu

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

When reactant gases flow along a channel in serpentine flow field of a proton exchange membrane (PEM) fuel cell, there is a pressure difference between the adjacent channels and it produces an under-land cross-flow (or under-rib convection) from the higher pressure side to the lower pressure side through the gas diffusion layer (GDL). A unique experimental setup is developed for in-situ measurement of this cross-flow and the GDL effective permeability at the cathode side of a PEM fuel cell under dry and realistic humidified gas conditions. The non-Darcy effect, defined as a function of the Forchheimer number is studied and compared for both 1 mm and 2 mm land widths and both dry and humidified air conditions. Finally, a dimensional analysis is performed and the non-dimensional cross-flowrate is shown to increases linearly with the increase of the non-dimensional pressure difference. Highlights: GDL effective permeability is measured under dry and humid conditions. In-situ measurement of under-land cross-flow is conducted. An dimensional analysis is performed. Cross-flowrate varies linearly with pressure difference in non-dimension form.

Original languageEnglish (US)
Pages (from-to)13725-13730
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number18
DOIs
StatePublished - Sep 1 2012

Keywords

  • Effective permeability
  • PEM fuel cell
  • Serpentine flow field
  • Under-land cross-flow

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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