Transport mechanisms and performance simulations of a PEM fuel cell with interdigitated flow field

• Main Authors: Chien-Chih Su, 蘇建誌
• Other Authors: Ching-Huang Chiu
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/aec2k6

碩士 === 國立虎尾科技大學 === 材料科學與綠色能源工程研究所 === 97 === The study simulates the distribution of concentration, pressure and local current density in a single proton exchange membrane fuel cell by using finite-element analysis software COMSOL Multiphysics. This mathematical model is three-dimensional, single-phase, isothermal and hybrid multi-component transport model. The calculated region has contained the proton exchange membrane as well as anode and cathode gas flow channel, gas diffusion layer, catalyst layer. In the research is used the continuity equation and Navier-Stokes equation, Brinkman equation to describe the flow of reactant gas and production in the gas flow channels, gas-diffusion electrodes, catalyst layers, flowing and the pressure distribution. The Maxwell-Stefan diffusion equation is used to study species transport of multi-component mixture gas. The potential for both solid and electrolyte phase are obtained by using charge conservation equation. The Butler-Volmer equation is used to describe electrochemical reaction for the domain in catalyst layer. The purpose of this study is to develop a three dimensional model for the simulation of PEMFCs, which can be applied to investigate the performance of fuel cells with the interdigitated and conventional flow fields with convergent channel configuration , such as the reactants mass concentration and velocity distribution, the polarization curve, the output power density and so on.