Enhancement of water droplet drainage performance in a cathode flow channel with baffles for a polymer electrolyte membrane fuel cell

被引:0
|
作者
Wang, Yulin [1 ,2 ,3 ]
Wang, Han [1 ]
Wang, Guozhuo [4 ]
Li, Hua [2 ,3 ]
Zhao, Yulong [5 ]
He, Wei [1 ]
机构
[1] Tianjin Univ Commerce, Tianjin Key Lab Refrigerat Technol, Tianjin 300134, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315200, Zhejiang, Peoples R China
[3] Key Lab Adv Fuel Cells & Electrolyzers Technol Zhe, Ningbo 315200, Peoples R China
[4] CATARC Automot Test Ctr Tianjin Co Ltd, Tianjin 300300, Peoples R China
[5] Hebei Univ Technol, Hebei Key Lab Thermal Sci & Energy Clean Utilizat, Tianjin 300401, Peoples R China
基金
中国国家自然科学基金;
关键词
Polymer electrolyte membrane fuel cell; Flow channel; Baffles; Water droplet drainage; GAS-DIFFUSION LAYER; MASS-TRANSFER; REACTANT TRANSPORT; SLUG FORMATION; 2-PHASE FLOW; REMOVAL; WETTABILITY; POWER; PORE;
D O I
10.1016/j.renene.2023.119395
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A reasonable design of flow channel is crucial for water management of a polymer electrolyte membrane fuel cell (PEMFC), and thus the cell performance. This paper develops newly designed baffles on a cathode flow channel to boost the water droplet drainage ability. The water droplet drainage characteristics within the novel flow channel are investigated by using a volume of fluid (VOF) method. The results show that the baffle height and number have a significant impact on the water droplet drainage performance. An appropriately increased baffle height and number leads to a shorter water droplet drainage time with a relatively low pressure drop. The water droplet drainage time for baffle height and number of 0.25 mm and 7 is reduced to 8.5 ms from 22.5 ms compared with that for the conventional channel. However, a too large baffle height and number could yield a very large pressure drop, thereby causing the water droplet detachment from the GDL surface and finally adsorption to the sidewalls. An optimal non-uniform interval layout of baffles along the channel can further shorten the water droplet drainage time by 6.25%. These findings can guide the optimal design of flow channels with baffles for a high-performance fuel cell.
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页数:9
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