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Localized Constriction Resistance Effects Upon SOFC Transport Phenomena

[+] Author Affiliations
George Nelson, Comas Haynes

Georgia Institute of Technology

Paper No. IMECE2005-80464, pp. 319-324; 6 pages
doi:10.1115/IMECE2005-80464
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Advanced Energy Systems
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Advanced Energy Systems Division
  • ISBN: 0-7918-4211-8 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

Continuum level mass and electronic transport through solid oxide fuel cell (SOFC) anodes are addressed employing the analytic solution of the Laplace equation. The constriction resistance effects of conventional interconnect design upon mass and electronic transport within SOFC anodes are emphasized. Mass transfer resistance effects are created by changes in cross-sectional area between the fuel stream-anode and anode-electrolyte interfaces. Similarly, increased ohmic losses are created by the reduction in cross-sectional area from the electrolyte-anode interface to the interconnect-anode interface. These resistance effects create competing losses that may require consideration in future SOFC component designs. The following paper has pilot quantification of such effects as an introduction to performance trends and an illustration of the analytic approach applied.

Copyright © 2005 by ASME

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