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Article

Study of the Gas Flow Distribution and Heat Transfer for Externally Manifolded Fuel Cell Stack Module Using Computational Fluid Dynamics Method

[+] Author and Article Information
Zhiwen Ma, Ramki Venkataraman, Mohammad Farooque

 Fuel Cell Energy, 3 Great Pasture Road, Danbury, CT 06813

J. Fuel Cell Sci. Technol 1(1), 49-55 (Jun 28, 2004) (7 pages) doi:10.1115/1.1794155 History: Received March 15, 2004; Revised June 28, 2004

Uniform gas flow distribution in a fuel cell system is desired to attain maximum power operation potential. Two types of manifold systems are often used in fuel cell stacks; they are internal manifold system and external manifold system. This paper presents the modeling approach using the Computational Fluid Dynamics (CFD) method in analyzing fluid flow and heat transfer for the external manifold fuel cell stacks and stack module design. Computational models based on a Megawatt carbonate fuel cell stack module have been developed for investigating the fuel and oxidant flow distributions through the external manifold systems. This paper presents the modeling approaches and flow and temperature distribution results for externally manifolded fuel cell stack and stack module.

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Copyright © 2004 by American Society of Mechanical Engineers
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Figures

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Figure 1

Comparison of internal and external manifold stack

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Figure 2

Sketch of the computational domain

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Figure 3

Heat generations and heat losses variation with cell current density

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Figure 4

Cell-to-cell fuel flow distributions for uniform stack temperature

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Figure 5

Cell-to-cell fuel flow distribution variations with an assumed temperature difference in stack

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Figure 6

Mesh comparisons for different cell sizes

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Figure 7

Pressure distributions in the symmetry plane for two different mesh sizes

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Figure 8

Velocity profiles in the dymmetry plane for different mesh sizes

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Figure 9

Temperature distributions in the symmetry plane for two different mesh sizes

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Figure 10

Mass flow rate and temperature deviations along stack A

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Figure 11

Mass flow rate and temperature deviations along stack B

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