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Research Papers

Modeling and Verification of Steady State Operational Changes on the Performance of a Solid Oxide Fuel Cell

[+] Author and Article Information
Eric S. Greene

Department of Mechanical Engineering, University of Connecticut, 191 Auditorium Road, Storrs, CT 06269-3139

Wilson K. S. Chiu1

Department of Mechanical Engineering, University of Connecticut, 191 Auditorium Road, Storrs, CT 06269-3139wchiu@engr.uconn.edu

A. Alan Burke, Maria G. Medeiros, Louis G. Carreiro

Division Newport, Naval Undersea Warfare Center, 1176 Howell Street, Newport, RI 02841

1

Corresponding author.

J. Fuel Cell Sci. Technol 6(4), 041001 (Aug 05, 2009) (4 pages) doi:10.1115/1.3080811 History: Received February 26, 2007; Revised August 22, 2008; Published August 05, 2009

Solid oxide fuel cells (SOFCs) offer many potential benefits as an energy conversion device. This paper addresses experimental validation of a numerical SOFC model that has been developed. Results are compared at steady state operation for temperatures ranging from 1073 K to 1173 K and for H2 gas concentrations fuel supplies of 10–90% with a balance of N2. The results agree well with a maximum of 13.3% difference seen between the numerical and experimental results, which is within the limit of the experimental uncertainties and the material constants that are measured, with most comparisons well below this level. It is concluded that since the model is very sensitive to material properties and temperature that for the best results they should be as specific as possible to the experiment. These specific properties were demonstrated in this paper and a validation of a full fuel cell model, with a concentration on the anode, was presented.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 3

Comparison of experimental (symbols) and numerical (lines) at temperatures from 1073 K to 1173 K

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Figure 4

Comparison of experimental (symbols) and numerical (lines) at various H2 fuel dilutions

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Figure 2

Diagram of the numerical model used in the study to calculate the effect of operation conditions on the performance of a solid oxide fuel cell

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Figure 1

Experimental testing setup. SOFC is a round disk 1.25 in. in diameter with a 1 in. diameter active area. Metallic current collectors are applied directly to the cell surface.

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