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TECHNICAL PAPERS

Enhancing the Performance Evaluation and Process Design of a Commercial-Grade Solid Oxide Fuel Cell via Exergy Concepts

[+] Author and Article Information
Comas Haynes

Georgia Tech Center for Innovative Fuel Cell and Battery Technologies, Georgia Tech Research Institute, Atlanta, GA 30332-0853

William J. Wepfer

The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405

J. Energy Resour. Technol 124(2), 95-104 (May 28, 2002) (10 pages) doi:10.1115/1.1467647 History: Received September 08, 2000; Revised October 26, 2001; Online May 28, 2002
Copyright © 2002 by ASME
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References

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Figures

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Isometric view of tubular solid oxide fuel cell
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Heat transfer within the cell
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(a): Functional dependence of gross real efficiency on operating pressure (b): Functional dependence of second-law efficiencies on operating pressure
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Functional dependence of efficiencies on stoichiometric number
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Functional dependence of major irreversibilities on stoichiometric number
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Variation of stack inlet air temperature as a function of air stoichiometric number
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Functional dependence of efficiencies on operating voltage
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Functional dependence of major irreversibilities on operating voltage
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Functional dependence of efficiencies on fuel utilization
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Ratios of preeminent irreversibilities to stack power production
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Impact of fuel utilization on stack inlet air temperature
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(a) Large voltage efficiency due to consistent proximity of operating voltage to Nernst potentials along cells. (b) Large voltage efficiency due to proximity of operating voltage to Nernst potential at the end of the cell.

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