A thermally self-sustaining miniature solid oxide fuel cell

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

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

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 publicationProceedings of the ASME International Mechanical Engineering Congress and Exposition, IMECE 2007
Pages117-122
Number of pages6
DOIs
StatePublished - 2008
EventASME International Mechanical Engineering Congress and Exposition, IMECE 2007 - Seattle, WA, United States
Duration: Nov 11 2007Nov 15 2007

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings
Volume6

Other

OtherASME International Mechanical Engineering Congress and Exposition, IMECE 2007
CountryUnited States
CitySeattle, WA
Period11/11/0711/15/07

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Ahn, J., Shao, Z., Ronney, P. D., & Haile, S. M. (2008). A thermally self-sustaining miniature solid oxide fuel cell. In Proceedings of the ASME International Mechanical Engineering Congress and Exposition, IMECE 2007 (pp. 117-122). (ASME International Mechanical Engineering Congress and Exposition, Proceedings; Vol. 6). https://doi.org/10.1115/IMECE2007-41137