https://scholars.lib.ntu.edu.tw/handle/123456789/80941
標題: | Analysis of thermal and water management with temperature-dependent diffusion effects in membrane of proton exchange membrane fuel cells | 作者: | Yan, Wei-Mon Chen, Falin Wu, Hung-Yi Soong, Chyi-Yeou Chu, Hsin-Shen |
關鍵字: | Diffusion effects; Proton exchange membrane fuel cells; Thermal and water management | 公開日期: | 2004 | 卷: | 129 | 期: | 2 | 起(迄)頁: | 127-137 | 來源出版物: | Journal of Power Sources | 摘要: | In the present work, the detailed thermal and water management in the membrane of proton exchange membrane fuel cells (PEMFC) is investigated numerically. The coupling effects of mass diffusion and temperature gradient on the water distribution in the membrane are taken into account with consideration of the temperature-dependent diffusivity. Thermal and water transport equations with various boundary conditions are solved by the control volume finite difference method. Predictions show that under the conditions of fixed water concentration at the cathode side, the effect of cathode temperature, T c, on the water concentration is significant. Increases in T c may lead to an increase in membrane dehydration. At the water-flux condition on the cathode side, the influence of the operating temperature on the water distribution in the membrane shows a similar trend. The effects of the anode temperature, Ta, on the water management in the membrane are also examined. It is found that Ta has considerable impact on the water content in the membrane. In addition, high current density may cause non-uniformity of the temperature distribution in the membrane. © 2003 Elsevier B.V. All rights reserved. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/120090 https://www.scopus.com/inward/record.uri?eid=2-s2.0-1842716857&doi=10.1016%2fj.jpowsour.2003.11.028&partnerID=40&md5=1a6f56ae3add011cc874aa0a1684301b |
ISSN: | 03787753 | DOI: | 10.1016/j.jpowsour.2003.11.028 | SDG/關鍵字: | Cathodes; Dehydration; Diffusion; Finite difference method; Ion exchange membranes; Mathematical models; Protons; Temperature distribution; Transport properties; Diffusion effects; Proton exchange membrane fuel cells (PEMFC); Thermal and water management; Fuel cells |
顯示於: | 應用力學研究所 |
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