强化传质流场对高温质子交换膜燃料电池性能改善的数值研究

Pub Date : 2023-05-08 DOI:10.1002/fuce.202200131
Lang Cai, Jun Zhang, Caizhi Zhang, Jiaming Zhou, Tao Zeng, Fengyan Yi, Donghai Hu, Xiaosong Zhang
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引用次数: 0

摘要

增强的传质流场已被证明是提高低温质子交换膜燃料电池电池性能的有效措施,但对高温质子交换膜燃油电池(HT-PMFC)的研究很少。在这项工作中,设计了三种类型的阴极增强传质流场(锥形、交错阻塞和阻塞)。定量研究并比较了不同流场对HT-PMFC反应物输送、电流密度分布均匀性和净功率输出的影响。研究发现,三种增强的传质流场可以通过将传统的扩散转化为扩散和强制对流的结合,有效地提高HT-PMFC的性能。鉴于其优越的性能和较低的流动阻力,锥形流场被认为是四种流场中HT‐PEMFC的最佳候选者,与传统流场相比,在1.4 a/cm2时,净功率增加了12.21%,电流密度分布均匀性提高了5.32%。这些结果支持HT‐PEMFC的进一步性能增强和应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical investigation of enhanced mass transfer flow field on performance improvement of high-temperature proton exchange membrane fuel cell

The enhanced mass transfer flow fields have been proven to be an effective measure to improve the cell performance of low-temperature proton exchange membrane fuel cells, yet little research has been done for high-temperature proton exchange membrane fuel cells (HT-PEMFC). In this work, three types of cathode-enhanced mass transfer flow fields (tapered, staggered-blocked, and blocked) are designed. The effects of various flow fields on the reactant delivery, current density distribution uniformity, and net power output of HT-PEMFC are quantitatively investigated and compared. It is found that the three enhanced mass transfer flow fields can effectively increase the performance of HT-PEMFC by transforming the traditional diffusion into a combination of diffusion and forced convection. In the sight of the superior performance and lower flow resistance, the tapered flow field is thought to be the optimal candidate for HT-PEMFC among the four flow fields, with a 12.21% net power increment and 5.32% current density distribution uniformity improvement at 1.4 A/cm2 compared to the conventional flow field. These results support further performance enhancements and applications of HT-PEMFC.

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