A parametric study of SOFC performances with multi-stage electrochemical oxidation for enhancement of electric efficiency

Y. Matsuzaki, Y. Tachikawa, T. Hatae, H. Matsumoto, S. Taniguchi, K. Sasaki

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

1 Citation (Scopus)

Abstract

The solid-state ceramic construction of SOFCs enables high fuel to electricity conversion efficiencies of as high as 50 to 60 percent LHV in high temperature operation, and allows more flexibility in fuel choice. In this study, we have developed a symbolic analysis method to investigate the availability of variable parameters appearing in multi-stage electrochemical oxidation mechanism that is expected to further improve the electric efficiencies of SOFCs. In the flow system of the multi-stage oxidation, the fuel utilization, Uf, at the most downstream stack, UfM, is expressed as a function of number of stacks, n, and total fuel utilization, UfT. When n = 10 and UfT = 85%, UfM is calculated to be 36%, which is much smaller than UfT. Therefore, if the most downstream stack has high robustness against lean fuel gas, UfT could be set to higher values without serious degradation by using this flow system.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 14, SOFC 2015
EditorsK. Eguchi, S. C. Singhal
PublisherElectrochemical Society Inc.
Pages1961-1968
Number of pages8
Edition1
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - Jan 1 2015
Event14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage - Glasgow, United Kingdom
Duration: Jul 26 2015Jul 31 2015

Publication series

NameECS Transactions
Number1
Volume68
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
CountryUnited Kingdom
CityGlasgow
Period7/26/157/31/15

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Matsuzaki, Y., Tachikawa, Y., Hatae, T., Matsumoto, H., Taniguchi, S., & Sasaki, K. (2015). A parametric study of SOFC performances with multi-stage electrochemical oxidation for enhancement of electric efficiency. In K. Eguchi, & S. C. Singhal (Eds.), Solid Oxide Fuel Cells 14, SOFC 2015 (1 ed., pp. 1961-1968). (ECS Transactions; Vol. 68, No. 1). Electrochemical Society Inc.. https://doi.org/10.1149/06801.1961ecst