| Summary: | 碩士 === 中國文化大學 === 材料科學與製造研究所 === 93 === ABSTRACT
The water movement in a membrane is primarily affected by two transfer modes: diffusion and electro osmosis. Based on the physical mechanisms of water transport and that of heat transfer, a numerical model including the water and heat production at the cathode is built to analyze the water and heat transfer in a proton exchange membrane fuel cells (PEMFC). The effects of current density, and the thickness, conductivity, molecular weigh, and thermal conductivity of membrane and electrodes on the distributions of temperature and water concentration are studied.
The mechanisms describing the oxygen, hydrogen, and contaminated components movements in an entire membrane electrodes assembly could further be added to the present model so that the performance of a proton exchange membrane fuel cell can be analyzed with more details.
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