OS5-3 中性子ラジオグラフィによる固体高分子形燃料電池内結露水の可視化と計測(OS5 水素・燃料電池,循環型社会における動力エネルギー技術)

概要

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Hydrogen gas and air are supplied in saturated moist condition to keep a membrane wet in a polymer electrolyte fuel Cell. Condensation may occur in the cathode side, since air is super-saturated by the fuel cell reaction. The condensed water may affect on the fuel cell performance. Water distributions in the operating PEFC were visualized by neutron radiography with measuring the cell voltage. A single cell with an electrode area of 25cm^2 were used in the visualization tests. Dynamic water behaviors were visualized by using neutron image intensifier, and recorded as video images. In order to measure water amount with high resolution, a cooled CCD camera with 16bit intensity levels were used, and still images were recorded. From the still images, water amount in the PEFC could be measured with a spatial resolution of 107μm quantitatively. The correlations between the water distribution and cell voltage fluctuations for three types of separator channels were clearly shown.
社団法人日本機械学会の論文
2007-06-13