Abstract
The aim of this study is pointing out the dominant factors of transfer phenomena and the main reason for distribution about heat and mass in single cell of Polymer Electrolyte Fuel Cell. In-plane temperature distribution in the single cell under power generation was measured by thermograph. The local in-plane temperature distribution under various experimental conditions was analyzed by dividing the images of in-plane temperature distribution. As a result, according to the analysis of the areas which are turned edges of gas channels in observation area, a temperature rise ratio is decreased with narrowing gas channel pitch irrespective of analyzed area and gas flow rate at inlet. In addition, the temperature rise ratio in the latter half in observation area is higher than that in the first half in observation area since the unreacted gas in gas channel was heated by convection heat transfer. Furthermore, the temperature rise ratio in the analyzed area near the gas inlet is decreased by increasing gas flow rate at inlet due to cooling effect by convection heat transfer of gas flow.
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