Fundamental mechanisms of gas purge in a polymer electrolyte fuel cell

Rineet K. Sinha, Chao Yang Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Gas purge intended to minimize residual water in the membrane, porous electrodes, and gas diffusion layers is critical for successful startup of a polymer electrolyte fuel cell (PEFC) from subfreezing temperatures. A basic understanding of the physical phenomena involved in gas purge, required to establish effective and energysaving purge protocols, is currently absent in the literature. In this work we delineate underlying physics of water removal from a PEFC during gas purge. Various stages of GDL and membrane drying are characterized and the variations along the flow direction are considered and emphasized. The predicted GDL drying time constant is compared with the tomographic experiments with good agreement. Detailed experimental validations are carried out and good match with experimental membrane HFR variation with purge time is obtained.

Original languageEnglish (US)
Title of host publicationECS Transactions - 7th Symposium Devoted to Proton Exchange Membrane Fuel Cells
Pages1535-1544
Number of pages10
Edition1 PART 2
DOIs
StatePublished - Dec 1 2007
Event7th Symposium Devoted to Proton Exchange Membrane Fuel Cells - 212th ECS Meeting - Washington, DC, United States
Duration: Oct 7 2007Oct 12 2007

Publication series

NameECS Transactions
Number1 PART 2
Volume11
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other7th Symposium Devoted to Proton Exchange Membrane Fuel Cells - 212th ECS Meeting
CountryUnited States
CityWashington, DC
Period10/7/0710/12/07

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Sinha, R. K., & Wang, C. Y. (2007). Fundamental mechanisms of gas purge in a polymer electrolyte fuel cell. In ECS Transactions - 7th Symposium Devoted to Proton Exchange Membrane Fuel Cells (1 PART 2 ed., pp. 1535-1544). (ECS Transactions; Vol. 11, No. 1 PART 2). https://doi.org/10.1149/1.2781066