Modeling polymer electrolyte fuel cells with large density and velocity changes

Yun Wang, Chao Yang Wang

Research output: Contribution to journalArticle

94 Scopus citations

Abstract

A model folly coupling the flow, species transport, and electrochemical kinetics in polymer electrolyte fuel cells is presented to explore operation undergoing very large density and velocity variations. Comparisons are also made to a previous constant-flow model, winch neglects the mass source/sink from the continuity equation and assumes constant gas density. Numerical results reveal large density (>50%) and velocity (>80%) variations occurring in the anode at anode stoichiometry of 1.2. In addition, the hydrogen concentration remained as high as the inlet owing to deceleration of the anode gas flow. Finally, the constant-flow model is accurate -within 14% under common operating conditions, i.e., for anode stoichiometry ranging from 1.2 to 2.0.

Original languageEnglish (US)
Pages (from-to)A445-A453
JournalJournal of the Electrochemical Society
Volume152
Issue number2
DOIs
StatePublished - Mar 17 2005

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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