Two-dimensional modeling of two-phase transport in the cathode of a PEMFC with the influences of clamping pressure
Date Issued
2009
Date
2009
Author(s)
Lin, Chia-Hui
Abstract
This study uses the finite element simulation software COMSOL project to establish two-dimensional two-phase proton exchange membrane fuel cell by numerical model. When air is input into the fuel cell cathode-side gas diffusion layer, this paper studies the distribution of generated oxygen and liquid water. Including the use of the theory of compressed gas diffusion layer of stress and strain module, oxygen and liquid water diffusive convection module, mass conservation module and momentum module, in addition to analyze the performance and the concentration distribution of the bipolar plate, which is stainless steel.esearch results show that high clamping pressure will make the gas diffuser layer deformed and decrease the porosity of gas diffuser layer. The transport resistance increases with decreasing diffusion and permeability coefficients depending on the gas diffusion layer porosity. It leads to a small effective reaction area, when the saturation of liquid water is larger to study the elastic deformation of the gas diffusion layer and the mass transport of the reactants and products. It is found that there exists a better clamping force to obtain the higher power density for the proton exchange membrane fuel cell with the interdigitated gas distributors.
Subjects
clamping pressure
interdigitated channel
transport resistance
Type
thesis
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