This study investigates the electrical performance of a planar solid oxide fuel cell unit with cross-flow configuration when the fuel utilization gets higher and the fuel inlet flows are nonuniform. A numerical code, solving the two-dimensional, simultaneous, partial differential equations of mass, energy, and electrochemistry and neglecting the stack direction variation effect, is developed. The results show that the fuel utilization increases with a decrease in the molar flow rate, and the average current density decreases when the molar flow rate drops. In addition, nonuniform pattern A induces more severe happening of nonreaction area in the corner of the fuel exit and the air inlet. This nonreaction area deteriorates the average current density and then reduces the electrical performance to 7%. This study suggests that the fuel inlet manifold should be located far from the inlet of air, which is able to decrease the deterioration to below 3% when using nonuniform profile of pattern B. On the other hand, employing a suitable air flow rate, we can easily control the operating temperature of a solid oxide fuel cell unit and the effect of nonuniform inlet air flow rate on the temperature distribution becomes negligible.
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e-mail: pyuan@mail.lit.edu.tw
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June 2011
This article was originally published in
Journal of Fuel Cell Science and Technology
Research Papers
Electrical and Thermal Performance of a Solid Oxide Fuel Cell Unit With Nonuniform Inlet Flow and High Fuel Utilization
Syu-Fang Liu,
Syu-Fang Liu
Lee Ming Institute of Technology
, 2-2 Lee Zhuan Road, Taishan, 243 Taipei, Taiwan, ROC
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Mu-Sheng Chiang,
Mu-Sheng Chiang
Nan Kai University of Technology
, 568 Chung Cheng Road, Tsaotun, 542 Nantou, Taiwan, ROC
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Shih-Bin Wang,
Shih-Bin Wang
Lee Ming Institute of Technology
, 2-2 Lee Zhuan Road, Taishan, 243 Taipei, Taiwan, ROC
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Ping Yuan
e-mail: pyuan@mail.lit.edu.tw
Ping Yuan
Lee Ming Institute of Technology
, 2-2 Lee Zhuan Road, Taishan, 243 Taipei, Taiwan, ROC
Search for other works by this author on:
Syu-Fang Liu
Lee Ming Institute of Technology
, 2-2 Lee Zhuan Road, Taishan, 243 Taipei, Taiwan, ROC
Mu-Sheng Chiang
Nan Kai University of Technology
, 568 Chung Cheng Road, Tsaotun, 542 Nantou, Taiwan, ROC
Shih-Bin Wang
Lee Ming Institute of Technology
, 2-2 Lee Zhuan Road, Taishan, 243 Taipei, Taiwan, ROC
Ping Yuan
Lee Ming Institute of Technology
, 2-2 Lee Zhuan Road, Taishan, 243 Taipei, Taiwan, ROCe-mail: pyuan@mail.lit.edu.tw
J. Fuel Cell Sci. Technol. Jun 2011, 8(3): 031002 (7 pages)
Published Online: February 15, 2011
Article history
Received:
August 15, 2009
Revised:
June 15, 2010
Online:
February 15, 2011
Published:
February 15, 2011
Citation
Liu, S., Chiang, M., Wang, S., and Yuan, P. (February 15, 2011). "Electrical and Thermal Performance of a Solid Oxide Fuel Cell Unit With Nonuniform Inlet Flow and High Fuel Utilization." ASME. J. Fuel Cell Sci. Technol. June 2011; 8(3): 031002. https://doi.org/10.1115/1.4002228
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