基于反应状态原位测试的空冷型燃料电池运行参数分析
收稿日期: 2022-08-19
修回日期: 2022-11-12
录用日期: 2022-12-08
网络出版日期: 2023-03-07
基金资助
国家自然科学基金面上项目(52075322)
Operation Parameters of Air-Cooled Fuel Cell Based on In-Situ Testing of Reaction State
Received date: 2022-08-19
Revised date: 2022-11-12
Accepted date: 2022-12-08
Online published: 2023-03-07
空冷型质子交换膜燃料电池内部反应状态是影响电池输出性能和稳定性的关键因素.通过研制空冷燃料电池反应状态的原位测试装置,实现电池温度和电流密度的实时测量,揭示氢气出口脉排间隔、氢气入口气压和阴极风速对电池性能的影响机制.研究表明:空冷电池中温度和电流密度分布不均,平均电流密度为500 mA/cm2时,电池内温度极差达到20 ℃,电流密度极差达到400 mA/cm2.氢气出口脉排间隔越短、入口气压越大,氢气出口区域性能越好,分布均匀性越好,电流密度波动也越小,输出稳定性提高.如果阴极风速过低,电池局部温度高,温度分布均匀性降低;风速过高则导致生成水被吹走,质子膜含水量下降,电流密度分布均匀性变差.
陈敏学, 邱殿凯, 彭林法 . 基于反应状态原位测试的空冷型燃料电池运行参数分析[J]. 上海交通大学学报, 2024 , 58(3) : 253 -262 . DOI: 10.16183/j.cnki.jsjtu.2022.318
The internal reaction state of air-cooled proton exchange membrane fuel cell (PEMFC) is the key factor affecting the output performance and stability of the cell. By developing an in-situ testing device for the reaction state of air-cooled fuel cell, the real-time measurement of cell temperature and current density is realized, and the influence mechanism of hydrogen outlet pulse interval, hydrogen inlet pressure and cathode wind speed on the performance of the cell is revealed. The results show that the distribution of temperature and current density in air-cooled cells is uneven. The temperature difference can reach 20 °C, and the current density difference reaches 400 mA/cm2 when the average current density is 500 mA/cm2. As the interval between pulses decreases and the inlet pressure increases, the performance of the hydrogen outlet area and the uniformity of the distribution increase, which can reduce the fluctuation of current density in the cells and improve output stability. If the cathode wind speed is too low, the temperature in central areas is high, and the temperature distribution uniformity is reduced. However, excessive wind speed causes the generating water to be blown away. The water content of the proton exchange membrane thus decreases, and the uniformity of the current density distribution deteriorates.
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