管状直接甲醇燃料电池的建模和仿真

Modeling and Simulation of Tubular Direct Methanol Fuel Cell

通过对管状DMFC的电化学反应机理分析,采用活塞流反应模型建立了甲醇、氧气和气态水的浓度分布模型;依据列管式换热器原理,建立了甲醇溶液、膜电极和空气的温度分布模型,并对电流密度、进料参数对浓度分布以及电池温度影响进行仿真,为管状直接燃料电池选择合理的控制变量和控制策略提供依据;仿真结果表明,对于液相进料的DMFC,甲醇溶液的温度是影响整个电池温度的主要因素;根据燃料电池的热力学数据,对电池的效率进行了分析。

The model of tubular direct methanol fuel cell was developed to simulate the concentration profiles of methanol in the anode, the oxygen and the vaporized water in the cathode based on the plug flow reactor model, and the temperature profiles of the methanol solution, MEA and the air based on the tube-shell exchanger model. The developed model provided the references to select the rational control variables and control strategies. The results show the temperature of the feed methanol solution is the key factor on the MEA, and the methanol crossover affects not only the efficiency of fuel cell, but also the temperature of fuel cell, and the efficiency of the TDMFC was analyzed by the thermodynamic data of fuel cell.