摘要
为了研究阳极压力降对质子交换膜燃料电池性能的影响,提出了一个新的相对湿度-压力降(RHPD)模型。RHPD模型考虑了由阳极含水量变化引起的质子交换膜燃料电池阳极压力降变化的现象。将RHPD模型通过自定义函数导入Fluent中,完成燃料电池在不同工况下的仿真计算。对工作温度为60℃,阴极相对湿度为50%,阳极相对湿度分别为25%,50%,75%下的电池性能进行了测定。通过比较Fluent模型,RHPD模型和试验数据三者发现:相对湿度为25%,电流密度为445 mA/cm~2,RHPD模型和试验值数据间仅存在0.11%误差。
In order to study the effect of anode pressure drop on the performance of proton exchange membrane fuel cell(PEMFC), a new relative humidity & pressure drop(RHPD) model was proposed. This model took into account the pressure drop of PEMFC caused by the change of anodic water content. The RHPD model was imported into Fluent by user-defined function. The simulation was completed under different working conditions. The performance of the battery was measured when the operating temperature was 60 ℃, the cathode relative humidity was 50% and the anode relative humidity respectively was 25%, 50% and 75%. Compared with Fluent model, RHPD model and the experiment data, it is found that the relative humidity is 25% and the current density is 445 mA/cm~2. There are only 0.11% difference between RHPD model and experiment data.
引文
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