著者

堤 泰行 山口 雅教

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.113, no.7, pp.776-784, 1993-07-20 (Released:2008-12-19)

参考文献数

3

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Experimental studies and analytic theories are presented on a steam share between exhausted air and exhausted fuel from phosphoric acid fuel cells.The steam share depends on a fiow rate of air and fuel. The share characteristics can be explained by a steam transport mechanism in which steam carried with air and fuel are combined with steam permeated through an electrolyte layer.The mechanism is applied to the published analytic theory for fuel cell performance. The revised theory can calculate steam share between air and fuel at each part of a cell. The calculated steam share between exhausted air and exhausted fuel at typical operating conditions of a fuel cell plant is presented.A simplified method for calculating steam share is developed and shown to give almost the same results with the detailed theory for fuel cell performance.

著者

堤 泰行 草野 善照 小野 訓 藤井 寛一 檜垣 勝

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌A(基礎・材料・共通部門誌) (ISSN:03854205)

巻号頁・発行日

vol.111, no.11, pp.979-987, 1991-11-20 (Released:2008-07-15)

参考文献数

9

被引用文献数

4 4

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Effect of discharge inception voltage on electromagnetic noise spectra in VHF and UHF region from spark discharge at hemisphere-plane electrodes in atmosphere is studied. The discharge inception voltages are changed by several means, such as increasing gap length from 2mm to 6mm, or UV-ray irradiation, or increasing stress concentration at the electrode tip, or spreading dust such as cotton cloths, acylic resin particles, copper particles, or alminum particles on the plane electrode.When the discharge inception voltage is increased, macroscopic slope of noise spectra from 100MHz to 1 GHz decreases generally, that is, high frequency components of noise increase with thevoltages.These phenomena can be explaned by theoretical analysis based onToepler's Law of spakdischarge and Hertz's dipole EM radiation law. As the exceptional cases, low dicharge inception voltages by metal particles or by positive stress concentration at the electrode tip do not contribute much to suppression of high frequency components of the noise.