PEFCの水の挙動に関する複合的観測
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概要
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Measurements of water droplets in the PEFC cathode and of current distribution were carried out simultaneously. Visualization of water droplets was observed using an optical cell. When oxygen utilization rate was increased from 40% to 80%, the transition point from the gas phase flow to the two phase flow moved to the cathode inlet. Under the exactly same experimental condition, current distribution was measured simultaneously using the specially modified optical cell. The current near the cathode inlet increased when oxygen utilization rate was increased but it was decreased near the cathode exit. The decrease of the current near the exit was due to the decrease of partial pressure of oxygen and also due to the flooding at the cathode under the high utilization of oxygen.
- 福井工業大学の論文