质子交换膜燃料电池动态特性实验研究

EXPERIMENTAL STUDY OF PEM FUEL CELL DYNAMIC BEHAVIORS

质子交换膜燃料电池动态特性的研究对于实际应用来说非常重要,实验研究了质子交换膜单体燃料电池在负载动态变化及启动过程中性能的响应。基于计算机控制的负载变化,得到了在不同进气加湿程度下电池性能在负载突变时的响应和在启动工况中的变化,结果表明电池电流对电压动态变换的响应很迅速,突变工况下电流密度出现了过增现象,高加湿程度的电池在设计启动过程中获得了更好的性能。

The explicit knowledge of transient behavior of a PEM fuel cell is becoming an important research subject, and is important for the control, design, and optimum operation of fuel cells. The effects of inlet humidification on variable load changes and its performance during a simulated start-up operation are examined experimentally. The PEM fuel cell was found to respond quickly and reproducibly to load changes. In addition, overshoot behaviors of cell voltage during load changes was observed. It was also found that increase in the inlet humidification significantly influences the start-up performance of a PEM fuel cell.