质子交换膜燃料电池氢气循环过程的稳态模拟与分析

Steady State Simulation and Analysis of Hydrogen Recirculation Process for Proton Exchange Membrane Fuel Cell

为保证质子交换膜燃料电池在发电和交通领域的稳定高效应用,通常采用阳极氢气循环的方法提高氢气利用率,同时提升燃料电池的性能和寿命。本文以一个氢气循环模式的燃料电池系统为研究对象,对循环泵、阴极外加湿、阳极排气阀等进行了设计,并对氢气循环过程进行了稳态系统建模、计算与分析,研究了氢气循环比、运行温度、运行压力、电流密度对系统水气平衡和电效率的影响。

The anode hydrogen recirculation technique is usually implemented in Proton Exchange Membrane Fuel Cell(PEMFC)systems to increase the fuel utilization and improve reactant humidification,and so as to ensure the stable and efficient operation of fuel cell for both power generation and transportation applications In this paper,a fuel cell system consisting of hydrogen recirculation pump,cathode humidifier and anode exhaust valve is designed A steady state model is developed to simulate the water vapor balance for hydrogen recirculation process Meanwhile,fuel cell system efficiency is studied in terms of hydrogen recycle ratio,operating temperature,operating pressure and current density.