Simulation of Temperature Impact on Mass Fraction on Cathode-Upward in the Cathode of PEM Fuel Cell

2010 International Conference on E-Product E-Service and E-Entertainment Pub Date : 2010-12-10 DOI:10.1109/ICEEE.2010.5660981

Shizhong Chen, Yuhou Wu, Hong Sun, Lihua Luan

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Abstract

The performance of a PEM(Proton Exchange Membrane) fuel cell can be expressed by the voltage-Current density(V-I) characteristics. In this study, a mathematical modeling for computing the mass fraction characteristics of PEM fuel cell has been improved. It is simulation of species mass fraction in this paper. Model was set up by three conservation equations, and it was considered the Gravity in source item. The modeling domain consists of the membrane, two catalyst layers, two diffusion layers, and two channels. The results of simulation were drawn six pictures. On analyzing of pictures, it got conclusion as follows: Oxygen mass fraction in cathode of PEM fuel cell will decrease with the temperature rising. Oxygen mass fraction decreases along with channel due to electrochemical reaction. Water mass fraction in cathode of PEM fuel cell will increase with the temperature rising. Water mass fraction increases along with channel due to electrochemical reaction, water production in the cathode catalyst layer and the transport of water from the anode side.

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温度对PEM燃料电池阴极上阴极质量分数影响的模拟

质子交换膜(PEM)燃料电池的性能可以用电压-电流密度(V-I)特性来表示。本文对PEM燃料电池质量分数特性的数学模型进行了改进。本文是对物种质量分数的模拟。模型由三个守恒方程建立，并考虑源项中的重力。建模域由膜、两个催化剂层、两个扩散层和两个通道组成。仿真结果绘制了六幅图。通过对图片的分析，得出如下结论:PEM燃料电池正极氧质量分数会随着温度的升高而降低。由于电化学反应，氧的质量分数随通道的增加而减小。PEM燃料电池阴极的水质量分数随着温度的升高而增加。由于电化学反应、阴极催化剂层产水和阳极侧水的输运，水的质量分数随通道增加而增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2010 International Conference on E-Product E-Service and E-Entertainment

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