质子交换膜燃料电池水传递模型

提出了用于研究质子交换膜燃料电池膜中水分布、水传递量分布、电流密度分布等的二维数学模型;系统地考察了电池温度、阴阳极压力差、增湿程度、质子膜厚度等条件对水的传递和膜中水分布的影响.计算结果表明:①阳极增湿能够提高气体进口段膜阳极侧水的含量;②使用越薄的质子膜,越能提高膜中水的含量;③阳极增湿程度越大,由阳极向阴极迁移的水量越多.

MODEL OF WATER TRANSPORT FOR PROTON-EXCHANGE MEMBRANE FUEL CELL(PEMFC)

A two - dimensional model of water transport is developed to investigate the distribution of water in the membrane, the distribution of the rate of water transport, the distribution of current density in the proton- exchange membrane fuel cell(PEMFC) . The effects of cell temperature, pressure difference between cathode and anode, humidification and thickness of membrane on water transport and distribution of water in the membrane are studied systematically. The conclusions from the model are as follows: ① If the anode is humidified, the water content on the anode side membrane in the reactant gas entrance can be increased; ② The thinner the membrane used, the higher the water content in the membrane;③ The higher the anode is humidified, the more water will migrate from anode to cathode.