不同流场结构对PEMFC性能影响的模拟研究  

NUMERICAL SIMULATION ON EFFECT OF DIFFERENT FLOW FIELDS ON PERFORMANCE OF PEMFC

作　　者：张拴羊 杨其国 徐洪涛[1] 毛逸君 王珂 刘舜 Zhang Shuanyang;Yang Qiguo;Xu Hongtao;Mao Yijun;Wang Ke;Liu Shun(Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海市动力工程多相流动与传热重点实验室,上海200093

出　　处：《太阳能学报》2023年第8期62-67,共6页Acta Energiae Solaris Sinica

摘　　要：该文模拟常规矩形平行流场、正六边形平行流场和正六边形蜂窝状仿生学流场对质子交换膜燃料电池(PEMFC)性能的影响。通过对极化曲线、氧气和水分布、膜电流密度以及压降和寄生功率密度进行分析,结果表明:正六边形流场表现出良好的输出性能,且正六边形蜂窝状流场的电流密度比常规矩形平行流场和正六边形平行流场分别提升11.28%和4.95%。此外,常规矩形平行流场、正六边形平行流场和正六边形蜂窝状流场的氧气不均匀度分别为0.64、0.53和0.41,正六边形蜂窝状流场展现出更好的水和膜电流密度分布能力,进一步说明正六边形流场缓解了氧气、水和膜电流密度分布不均匀的问题。正六边形蜂窝状流场压降虽比常规矩形平行流场和正六边形平行流场分别增加40.0%和27.7%,有较高的寄生功率密度,但仍获得了最大的净输出功率密度。In this paper,the effects of conventional rectangular parallel,regular hexagonal parallel,and hexagonal honeycomb-like flow fields on the performance of proton exchange membrane fuel cells(PEMFC)are simulated.The polarization curve,distribution of oxygen and water,current density of membrane,and pressure drop and parasitic power density are analyzed.It is found that the regular hexagonal flow field shows a better output performance,and the current density of the hexagonal honeycomb-like flow field is 11.28%and 4.95%higher than that of the conventional parallel and regular hexagonal parallel flow fields,respectively.In addition,the oxygen non-uniformity of the conventional rectangular parallel,regular hexagonal parallel and hexagonal honeycomb-like flow channels are 0.64,0.53 and 0.41,and the honeycomb-like flow field shows a better distribution capacity of water and current density of membrane,which further indicates that the regular hexagonal flow field alleviates the problem of non-uniform distribution of oxygen,water,and current density of membrane.Although the pressure drop of the hexagonal honeycomb-like flow field is increased by 40.0%and 27.7%compared with the conventional rectangular parallel and the regular hexagonal parallel flow fields and the parasitic power density is higher,the maximum net output power density is still abtained.

关 键 词：质子交换膜燃料电池 流场 数值模拟 结构优化 

分 类 号：TM911.4[电气工程—电力电子与电力传动]