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A Thermally Self-Sustaining Miniature Solid Oxide Fuel Cell

Ahn, Jeongmin and Ronney, Paul D. and Shao, Zongping and Haile, Sossina M. (2009) A Thermally Self-Sustaining Miniature Solid Oxide Fuel Cell. Journal of Fuel Cell Science and Technology, 6 (4). Art. No. 041004. ISSN 1550-624X.

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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 were identified. SOFC power densities up to 420 mW/cm^2 were observed at low Re. These results suggest that single-chamber SOFCs integrated with heat-recirculating combustors may be a viable approach for small-scale power generation devices.

Item Type:Article
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URLURL TypeDescription ItemAIAA Conference Paper
Haile, Sossina M.0000-0002-5293-6252
Additional Information:©2009 American Society of Mechanical Engineers. Received 25 April 2007; revised 7 August 2008; published 11 August 2009. This work was supported by the U.S. Defense Advanced Research Projects Agency (DARPA) Microsystems Technology Office under Contract Nos. DABT63-99-C-0042 and SNWSCN66001-01-8966.
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)DABT63-99-C-0042
Defense Advanced Research Projects Agency (DARPA)SNWSCN66001-01-8966
Subject Keywords:heat exchangers; solid oxide fuel cells
Issue or Number:4
Classification Code:PACS: 82.47.Ed Solid-oxide fuel cells (SOFC)
Record Number:CaltechAUTHORS:20090923-143136060
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Official Citation:A Thermally Self-Sustaining Miniature Solid Oxide Fuel Cell Jeongmin Ahn, Paul D. Ronney, Zongping Shao, and Sossina M. Haile, J. Fuel Cell Sci. Technol. 6, 041004 (2009), DOI:10.1115/1.3081425
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16025
Deposited By: George Porter
Deposited On:07 Oct 2009 21:58
Last Modified:29 Apr 2020 15:24

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