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Analysis of Nonuniform Cell Voltage Distribution in a PEMFC Stack

[+] Author Affiliations
Shuang Zhai, Fengxiang Chen, Chuansheng Zhang, Su Zhou

Tongji University - Jiading, Shanghai, China

Pengtao Sun

University of Nevada, Las Vegas, Las Vegas, NV

Paper No. FuelCell2010-33059, pp. 481-488; 8 pages
doi:10.1115/FuelCell2010-33059
From:
  • ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology
  • ASME 2010 8th International Fuel Cell Science, Engineering and Technology Conference: Volume 1
  • Brooklyn, New York, USA, June 14–16, 2010
  • Conference Sponsors: Advanced Energy Systems Division
  • ISBN: 978-0-7918-4404-5 | eISBN: 978-0-7918-3875-4
  • Copyright © 2010 by ASME

abstract

The nonuniform cell voltage distribution greatly influences design complexity, heat management and system performance, such as life time, reliability and output power, etc., in a real PEMFC system. To get insight into the corresponding influence factors, a fully coupled non-isothermal, electrochemical and transport 3D model for a 10-cell PEMFC stack with coolant channels is set up in this paper and the nonuniform characteristics are reconstructed under the defined operating conditions by simulations. It is found that the temperature profile in the stack has an important impact on the cell voltage distribution through influencing the distribution of activation potential and ohmic overpotential.

Copyright © 2010 by ASME

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