IEEJ Transactions on Power and Energy
Online ISSN : 1348-8147
Print ISSN : 0385-4213
ISSN-L : 0385-4213
Pressurized Fuel/Air Operated Solid Oxide Fuel Cell Combined Carbon-Dioxide-Capturing High-Performance Power Generation System
Yoshitaka InuiTaichi IshidaTomohiro Matsumae
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2003 Volume 123 Issue 9 Pages 1097-1104


The authors recently proposed a solid oxide fuel cell (SOFC) and closed-cycle MHD combined carbon-dioxide-capturing high-performance power generation system using pure oxygen as the oxidant. This combined system can make the best use of the merit of pure oxygen combustion, while its demerit of efficiency deterioration by large required power for oxygen generation still remains. In the present study, the authors modify this already proposed system and newly propose an improved carbon-dioxide-capturing SOFC/MHD combined power generation system with higher total thermal efficiency. In the system, pure oxygen is only supplied to the afterburner to save the required power for oxygen generation, and pressurized air is selected as the oxidant gas of the SOFC. The saved power amounts to about 5% of the thermal input, resulting in the very high total thermal efficiency of 67.53% (HHV) or 74.94% (LHV), which is considered to be the highest possible value as the total thermal efficiency of carbon-dioxide-capturing systems. The proposed system is worth carrying out further research and development.

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© 2003 by the Institute of Electrical Engineers of Japan
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