Influence of local porosity and local permeability on the performances of a polymer electrolyte membrane fuel cell

被引:15
作者
Akiki, Tilda [1 ,2 ]
Charon, Willy [2 ]
Iltchev, Marie-Christine [2 ]
Accary, Gilbert [1 ]
Kouta, Raed [2 ]
机构
[1] Univ St Esprit Kaslik, Kaslik, Lebanon
[2] Univ Technol Belfort Montbeliard, FCLAB Inst Res Fuel Cell Syst, F-90010 Belfort, France
关键词
Polymer electrolyte membrane fuel cell; Multi-physical interaction; Fuel cell modeling; Performance; GAS-DIFFUSION LAYER; INHOMOGENEOUS COMPRESSION; CONTACT RESISTANCE; OPTIMIZATION;
D O I
10.1016/j.jpowsour.2010.03.020
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
In the literature, many models and studies focused on the steady-state aspect of fuel cell systems while their dynamic transient behavior is still a wide area of research. In the present paper, we study the effects of mechanical solicitations on the performance of a proton exchange membrane fuel cell as well as the coupling between the physico-chemical phenomena and the mechanical behavior. We first develop a finite element method to analyze the local porosity distribution and the local permeability distribution inside the gas diffusion layer induced by different pressures applied on deformable graphite or steel bipolar plates. Then, a multi-physical approach is carried out, taking into account the chemical phenomena and the effects of the mechanical compression of the fuel cell, more precisely the deformation of the gas diffusion layer, the changes in the physical properties and the mass transfer in the gas diffusion layer. The effects of this varying porosity and permeability fields on the polarization and on the power density curves are reported, and the local current density is also investigated. Unlike other studies, our model accounts for a porosity field that varies locally in order to correctly simulate the effect of an inhomogeneous compression in the cell. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:5258 / 5268
页数:11
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