燃料电池阴极空气过滤器对SO2的化学吸附仿真

Simulation of Chemical Adsorption for SO2 in Fuel Cell Cathode Air Filter

摘要:

化学吸附性能是燃料电池发动机阴极空气过滤器设计的主要参数之一.通过采用实验和计算机仿真的方法,研究了SO2在过滤器内的化学吸附行为,建立了平衡吸附量初始进气体积分数空气流速的三维数学模型.根据吸附模型编写了用户自定义函数作为约束条件方程,运用FLUENT软件对过滤器吸附SO2体积分数分布进行仿真研究,并成功应用于过滤器的结构设计.通过对5 kW燃料电池发动机空气过滤器的仿真,可以清晰地模拟SO2在过滤器内的吸附过程,预测过滤器的失效时间为1 203 h.

Abstract:

Chemical adsorption performance is one of the key parameters in cathode air filter design for fuel cell engine.The paper focuses on the simulation of chemical adsorption in air filter with chemical experiments.The SO2 adsorption action of adsorbent in filter was studied by experiments,a threedimension mathematic model between inlet property and adsorption property was built based on experimental data.user define function was compiled according to 3D model,which was used in FLUENT software as restraint joint.The chemical simulation of air filter was studied based on Fluent,which was applied to the air filter structure design for a 5kW fuel cell stack system successfully.The SO2 chemical adsorption was simulated in air filter and the deadline of filter calculated was about 1 203 h.