文献类型：期刊文献

英文题名：Effect of Flow Channel Blockage on the Scale-Up of Proton Exchange Membrane Fuel Cells

作者：Wang, Bin[1]; Pan, Weitong[1]; Tang, Longfei[1]; Zhang, Guoyu[1]; Gao, Yunfei[1]; Chen, Xueli[1]; Wang, Fuchen[1]

机构：[1] Institute of Clean Coal Technology, East China University of Science and Technology, 130 Meilong Road, Shanghai, China

年份：2024

卷号：393

起止页码：312

外文期刊名：Springer Proceedings in Physics

收录：EI(收录号：20240615507659)

语种：英文

外文关键词：Channel flow - Flow fields

摘要：Optimizing flow field structure can effectively improve the performance of Proton Exchange Membrane Fuel Cell (PEMFC). Adding the block in the flow channel is one of the approaches. In this work, the enhanced transport characteristic of the block is re-examined, and its effect on the performance of the fuel cell scale-up is further revealed. The models of single-channel fuel cells with different lengths L and blockage ratio β are developed. Results show that the best cell performance exhibits when β = 100% due to the combined effect of the block and upstream zone. The convection appears below the block, and higher upstream pressure is induced, both of which increase the oxygen concentration at the catalyst layer. Besides, results indicate that the performance of the scaled-up fuel cell with blockage increases at a slower rate. Combined with the pump power, it is found that the addition of the block with β = 100% is indeed beneficial for the fuel cell scale-up. The findings of different blockage effects on different-sized cells provide guidelines for the flow field design. ? 2024, The Author(s).