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| 热辐射场与风场耦合作用下风冷式PEMFC性能实验研究 |
| Experimental study on an air-cooled PEMFC stack under the coupling fields of thermal radiation and wind |
| 投稿时间：2024-05-11 修订日期：2024-06-05 |
| DOI： |
| 中文关键词: 风冷式质子交换膜燃料电池 热辐射场 风场 电堆温度 输出功率 |
| 英文关键词:Air-cooled PEMFC thermal radiation field wind field stack temperature output power |
| 基金项目:基于太阳能光伏的高安全电解水制氢关键技术研发 |
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| 中文摘要: |
| 为研究热辐射和风环境对风冷式PEMFC（Proton exchange membrane fuel cell,质子交换膜燃料电池）性能的影响，文章针对20片单电池组成的风冷式PEMFC，分别采用风速仪、辐射热流计测量环境风速、热辐射强度，K型热电偶、电子负载测量电堆温度、负载电流和输出功率。实验结果表明：施加热辐射场与逆风场，电堆的平均温度升高，且与负载电流、热辐射场强度、逆风场风速之间呈较好的正相关关系。距离辐射热源最近的单电池温升最为显著，靠近电堆中部的单电池温升逐渐递减。低负载电流下，电堆的输出功率随负载电流、热辐射场强度的增加而提升；高负载电流下，电堆中间部位的单电池的温度会超过运行阈值导致电堆无法正常运行。施加热辐射场与顺风场，电堆温度升高，随着顺风场风速的增加，单电池温度升高更加均匀，电堆的平均温升越小。电堆输出功率始终呈现衰减趋势，在高负载电流下增强电堆的散热能力并不能有效的提高其输出功率，而将反应气体加湿后输送进入电堆可以有效减少在热辐射与风环境下电堆输出功率的衰减。 |
| 英文摘要: |
| In order to study the influence of thermal radiation and wind environment on the performance of air-cooled proton exchange membrane fuel cell (PEMFC), this paper focuses on the air-cooled PEMFC composed of 20 single cells. The anemometer and radiation heat flow meter are used to measure the wind speed and thermal radiation intensity respectively. The K-type thermocouple and electronic load are used to measure the stack temperature, load current and output power. The experimental results show that, with simultaneous application of thermal radiation and headwind，the average stack temperature increases. The temperature rise of the single cell closest to the radiation source is the largest, while the single cell closer to the middle of the stack has the smaller temperature rise. The increase of the average stack temperature has a good positive correlation with the load current, the thermal radiation intensity and the headwind speed. The output power of the stack increases under low load current, and a good positive correlation is found between the load current and the thermal radiation intensity. Under high load current, when the temperature of the single cell in the middle of the stack exceeds the operating threshold temperature, the stack fails to be operated normally. With simultaneous application of thermal radiation and downwind，the stack temperature increases. As the downwind speed increases, the temperature of the single cell increases more evenly, but the increase rate of the average stack temperature decreases. The output power of the stack is always attenuated. When the stack runs at high load current, enhancing the heat dissipation capacity of the stack cannot effectively improve the output power of the stack, and therefore the water management inside the stack should be involved. |
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