A thermally self-sustaining miniature solid oxide fuel cell

Jeongmin Ahn, Paul D. Ronney, Zongping Shao, Sossina M. Haile

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

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.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 5th International Energy Conversion Engineering Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages590-595
Number of pages6
ISBN (Print)1563479028, 9781563479021
DOIs
StatePublished - Jan 1 2007
Event5th International Energy Conversion Engineering Conference - St. Louis, MO, United States
Duration: Jun 25 2007Jun 28 2007

Publication series

NameCollection of Technical Papers - 5th International Energy Conversion Engineering Conference
Volume1

Other

Other5th International Energy Conversion Engineering Conference
CountryUnited States
CitySt. Louis, MO
Period6/25/076/28/07

ASJC Scopus subject areas

  • Energy(all)

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  • Cite this

    Ahn, J., Ronney, P. D., Shao, Z., & Haile, S. M. (2007). A thermally self-sustaining miniature solid oxide fuel cell. In Collection of Technical Papers - 5th International Energy Conversion Engineering Conference (pp. 590-595). (Collection of Technical Papers - 5th International Energy Conversion Engineering Conference; Vol. 1). American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/6.2007-4767