Numerical analysis of relative humidity distribution in polymer electrolyte fuel cell stack including cooling water

Gen Inoue, Takashi Yoshimoto, Yosuke Matsukuma, Masaki Minemoto, Hideki Itoh, Shigeru Tsurumaki

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Polymer electrolyte fuel cell (PEFC) needs to be examined relative humidity distribution and current density distribution to improve the durability. In this study, the PEFC reaction and thermal flow analysis model including the effect of cooling water was developed. Furthermore, the effects of the shape of separator channels and the flow pattern on current density distribution and relative humidity distribution were examined by this numerical analysis. As a result, it was found that the uniform current density distribution did not directly relate to the uniform humidity distribution, because the humidity distribution was complexly affected by the generated water, the water transfer between the anode and the cathode and the gas temperature. Moreover, it was confirmed that the optimal flow pattern of gas and cooling water could make the relative humidity higher and more uniform. This calculation model can help us to design the optimal separator shape and to determine the optimal operating conditions which can narrow the low humidity area and improve the cell durability.

Original languageEnglish
Pages (from-to)81-93
Number of pages13
JournalJournal of Power Sources
Volume162
Issue number1
DOIs
Publication statusPublished - Nov 8 2006

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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