4.7 Article

Numerical investigation of water droplet removal characteristics in novel block channels of PEMFC using dynamic wettability model

期刊

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 74, 页码 36890-36902

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.08.221

关键词

Proton exchange membrane fuel cell; Water management; Block; Dynamic contact angle; Flow channel

资金

  1. National Natural Science Foundation of China [51706153]

向作者/读者索取更多资源

This study investigates the effects of novel channel designs on liquid water removal in PEMFC, compared to traditional straight channels. The one-block channel accelerates water movement but with higher pressure drop, while the separated two-block channel achieves faster water removal and smaller pressure drop through capillary wicking effect.
Liquid water transport and removal is one of the critical issues in the proton exchange membrane fuel cell (PEMFC) for achieving good performance and durability. In this study, two novel channels with different blocks are designed to study their effects on water removal using the volume of fluid (VOF) model considering the dynamic contact angle effect. It is found that compared with the conventional straight channel, both the one block and two-block channels can promote liquid water removal. The one-block channel leads to faster water movement and removal on the gas diffusion layer (GDL) surface, but results in a much higher pressure drop. The separated two-block channel directly drags water away from the GDL surface by the capillary wicking effect of the block surface, achieving both faster water removal and smaller pressure drop. Effects of the droplet size, air velocity and static contact angle of GDL surface on water removal are investigated comprehensively in both the novel channels, as well as the conventional straight channel, with particular attention on the variations of water removal time, water coverage ratio and pressure drop. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据