A numerical study of orientated-type flow channels with porous-blocked baffles of proton exchange membrane fuel cells

被引：51

作者：

Chen, Hao ^{[1
,2
]}

Guo, Hang ^{[1
,2
]}

Ye, Fang ^{[1
,2
]}

Ma, Chong Fang ^{[1
,2
]}

机构：

[1] Beijing Univ Technol, MOE Key Lab Enhanced Heat Transfer & Energy Conse, Coll Energy & Power Engn, Beijing 100124, Peoples R China

[2] Beijing Univ Technol, Beijing Key Lab Heat Transfer & Energy Convers, Coll Energy & Power Engn, Beijing 100124, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2021年 / 46卷 / 57期

基金：

中国国家自然科学基金;

关键词：

Proton exchange membrane fuel cell; Orientated-type flow channel; Forchheimer's effect; Mass transfer; Flow channel design; 2-PHASE FLOW; MASS-TRANSFER; TEMPERATURE DISTRIBUTION; REACTANT TRANSPORT; AGGLOMERATE MODEL; IONOMER CONTENT; ANODIC SURFACE; WATER REMOVAL; METAL FOAM; CATHODE;

D O I：

10.1016/j.ijhydene.2020.12.178

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Orientated-type flow channels having porous blocks enhance the reactant transfer into gas diffusion layers of proton exchange membrane fuel cells. However, because of the blockages accounted by baffles and porous blocks in channel regions, pumping power increases. In this study, with the aim of further reducing the pumping power in flow channels with porous-blocked baffles, an orientated-type flow channel with streamline baffles having porous blocks is proposed. By employing an improved two-fluid model, cell performance, liquid water distribution and pumping power in a single flow channel are numerically studied. The simulation results show that the baffles with porous blocks increase the cell performance, and the streamline baffles with larger volumes further increase the performance; the produced water in porous regions is ejected more under inertial effect, especially at the regions near to baffles in gas diffusion layers and inside porous blocks. In addition, by using the streamline baffles, the excessive increase in power loss is further reduced. Moreover, the location and porosity effects of baffles with porous blocks are analyzed. Simulation results show that the location exhibits obscure effects on reactant transfer and cell performance, while the liquid water can be removed more when the porous blocked baffles are concentrated at downstream. The net power is enhanced more when using three porous blocks with the porosity of 0.00. (c) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：29443 / 29458

页数：16

共 64 条

[1] An investigation of the PEM fuel cells performance with partially restricted cathode flow channels and metal foam as a flow distributor [J].