JAXA Repository / AIREX 未来へ続く、宙(そら)への英知

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Other TitleFuel cell study for space applications in a micro-gravitational and closed environment
Author(jpn)曽根 理嗣; 上野 三司; 内藤 均; 桑島 三郎
Author(eng)Sone, Yoshitsugu; Ueno, Mitsushi; Naito, Hitoshi; Kuwajima, Saburo
Author Affiliation(jpn)宇宙航空研究開発機構 宇宙科学研究本部; 宇宙航空研究開発機構 総合技術研究本部; 宇宙航空研究開発機構 総合技術研究本部; 宇宙航空研究開発機構 総合技術研究本部
Author Affiliation(eng)Japan Aerospace Exploration Agency Institute of Space and Astronautical Science; Japan Aerospace Exploration Agency Institute of Space Technology and Aeronautics; Japan Aerospace Exploration Agency Institute of Space Technology and Aeronautics; Japan Aerospace Exploration Agency Institute of Space Technology and Aeronautics
Issue Date2004-06
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
Publication title第23回宇宙エネルギーシンポジウム 平成15年度
The 23rd ISAS Space Energy Symposium March 9, 2004
Start page65
End page69
Publication date2004-06
AbstractThe fuel cell for space applications has special system requirements, operational conditions, and designs due to its isolated low gravitational and closed environment, which is much different from that for ground applications. JAXA is now developing polymer electrolyte fuel cell (PEFC) system for the future space applications. It was found that the counter flow of pure hydrogen and oxygen enabled realization of a fuel-cell system without external humidification. Also demonstrated was closed gas operation to determine the applicability of the fuel-cell system in a closed environment, where hydrogen gas was dead-ended and oxygen gas was circulated with produced water removed. Considering gas/water separation in the micro-gravitational environment, a condenser was installed which condenses the humid gas exhausted from cell stack to water, and also installed was a cylindrical separator which contains wicking material to separate gas/water, in the gas recycling line together with a gas circulation pump. The wicking material which absorbed water was compressed by the piston in the separator and discharged the water into the receptacle. Water discharge had an operational cycle to be controlled in accordance with a water capacity of the quantity of electricity to be generated. The 18 cell stack was manufactured and a fuel cell system was assembled including the components mentioned above. It showed stable performance for 1,100 hours under various operational conditions. These results could realize the simple and practical PEFC system for space application.
Keywordsfuel cell; aerospace environment; microgravity; polymer electrolyte fuel cell; space technology experiment; research and development; closed system; performance test; 燃料電池; 航空宇宙環境; 微小重力; 固体電解質燃料電池; 宇宙技術実験; 研究開発; 閉鎖系; 性能試験
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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