抄録
To keep high performance in Polymer Electrolyte Fuel Cell (PEFC). it is important to realize uniform current density and temperature distribution over the reaction area. Tow types of fuel cells were made to measure temperatures in the cell : a cell containing 12 thermocouples in a thin carbon plate between the two cells, and one allowing visual observation of temperature distribution in the cell. The experimental results showed that hot spots appeared in the flooding condition and the temperature tended to be uniform when the flooding was removed. The optical observation show3ed the increasing temperature from the inlet side of cathord gas, but the same temperature change was observed even when the flow direction was reversed. The reason is not clear at this moment.
