燃料电池膜增湿器建模及仿真

Modeling and Simulation Research of Membrane Humidifier Used in Fuel Cell

建立了膜增湿的仿真模型,用于研究膜增湿器的传热、传质特性,分析了气体工质参数和结构参数对传热、传质过程的影响,主要结论如下:湿侧压力增加,水蒸气分子渗透量增加.干侧压力增加,水蒸气分子渗透量减少;干侧气体湿度增加,会减少水蒸气分子的渗透量.湿侧气体的湿度增加,会增加水蒸气分子的渗透量;逆流布置的传热、传质性能优于顺流布置,优先考虑逆流布置.

Established simulation model of membrane humidification to research humidifier characteristics in the process of heat and mass transfer. And an analysis was made of the effect of structural parameter and gas parameter in this process. The main conclusions are as follows： Increased pressure in wet-side will lead an increase of water vapor molecules osmotic amount. The dry-side pressure increases, while the amount of water molecule penetration would reduce. And in another aspects, effects of gas humidity on water vapor molecules osmotic amount is similar to that of pressure. The heat and mass transfer performance of counter flow layout is better than that of downstream layout, so which the former is preferred on flow channel layout choice.