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    A thermally self-sustaining miniature solid oxide fuel cell

    Access Status
    Fulltext not available
    Authors
    Ahn, J.
    Shao, Zongping
    Ronney, P.
    Haile, S.
    Date
    2008
    Type
    Conference Paper
    
    Metadata
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    Citation
    Ahn, J. and Shao, Z. and Ronney, P. and Haile, S. 2008. A thermally self-sustaining miniature solid oxide fuel cell, pp. 117-122.
    Source Title
    ASME International Mechanical Engineering Congress and Exposition, Proceedings
    DOI
    10.1115/IMECE2007-41137
    ISBN
    0791843009
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/32282
    Collection
    • Curtin Research Publications
    Abstract

    A thermally self-sustaining miniature power generation device was developed utilizing a single-chamber solid oxide fuel cell (SOFC) placed in a controlled thermal environment provided by a spiral counterflow "Swiss roll" heat exchanger and combustor. With the single-chamber design, fuel/oxygen crossover due to cracking of seals via thermal cycling is irrelevant and coking on the anode is practically eliminated. Appropriate SOFC operating temperatures were maintained even at low Reynolds numbers (Re) via combustion of the fuel cell effluent at the center of the Swiss roll. Both propane and higher hydrocarbon fuels were examined. Extinction limits and thermal behavior of the integrated system were determined in equivalence ratio - Re parameter space and an optimal regime for SOFC operation was identified. SOFC power densities up to 420 mW/cm2 were observed at low Re. These results suggest that single-chamber SOFC's integrated with heat-recirculating combustors may be a viable approach for small-scale power generation devices. Copyright © 2007 by ASME.

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