G302 感圧塗料による燃料電池内の酸素分圧分布測定(2)(GS-3 流体計測,一般セッション)

抄録

To improve efficiency and service life of a fuel cell, it is important to understand dynamic behavior of oxygen molecules in the cell. In other words, we need to know oxygen concentration distribution over electrode planes and inside diffused layers and its time variation. We applied Pressure-Sensitive Paint technique to this problem, attempting to measure distribution of partial pressure of oxygen along micro channels of a fuel cell. To prevent the effect of water produced by power generation process, we developed a water-repellant PSP that can withstand heat and humidity produced by power generation. Using this paint, partial oxygen distributions along the micro channels were successfully visualized, although there were noticeable effects of local temperature distribution on the absolute accuracy for the conditions with higher current densities.