Flow analysis and performance evaluation of the hydrogen recirculation system for fuel cells

Jae Choon Kim, Jin Taek Chung, Yongtaek Lee, Yongchan Kim, Hyung Seuk Oh

Research output: Contribution to conferencePaperpeer-review

Abstract

Numerical analysis on a hydrogen recirculation system has been conducted in order to enhance the efficiency of automotive fuel cell in this paper. Generally, excess hydrogen is provided in the automotive fuel cell and the excess hydrogen causes non-reaction in hydrogen reducing automotive fuel cell efficiency. Reuse of the non-reaction hydrogen can be helpful to improve the fuel cell performance. The mixture from PEMFC cathode contains not only the hydrogen but also water vapor and liquid water because humidification is applied to the inlets of the anode and cathode in order to supply water to membrane region, and liquid water is generated at anode due to the electrochemical reaction. In recirculation systems, the changes in pressure and temperature affect the phase change of mixture. The internal two-phase flow of the mixture in the hydrogen recirculation system of fuel cell was investigated with real boundary conditions. The variations of performance, properties, mass fraction and two-phase flow characteristic of mixture were investigated. This study was performed based on the recycling system of 80KW level automotive fuel cell.

Original languageEnglish
Pages742-750
Number of pages9
Publication statusPublished - 2006
Event22nd International Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exposition, EVS 2006 - Yokohama, Japan
Duration: 2006 Oct 232006 Oct 28

Other

Other22nd International Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exposition, EVS 2006
CountryJapan
CityYokohama
Period06/10/2306/10/28

Keywords

  • Fuel cell vehicles
  • Hydrogen recycle
  • Multi-component
  • Pem
  • Recirculation system
  • Two-phase flow

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Automotive Engineering

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