基于不同多级蛇形流场设计的 PEMFC 性能数值研究

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2024-10-21 DOI:10.1016/j.cej.2024.156951

Zhiqiang Liu, Qinghe Li, Sheng Yang, Honglin Zhang, Xin Chen, Nan Xie, Chengwei Deng, Wei Du

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引用次数: 0

摘要

在质子交换膜燃料电池（PEMFC）中，设计优良的流场可以显著提高输出电流密度，改善反应物分布的均匀性。蛇形流场因其出色的性能和简单的结构而受到更多关注，但考虑到反应物消耗的多通道蛇形流场研究却很少。本文考虑了反应物的消耗，设计了名为 multi-s 和 multipis 的流场，并与传统的蛇形流场（包括 3s、5s、3pis 和 5pis）进行了比较。与 3 s 和 5 s 相比，multi-s 的平均功率密度分别提高了 0.687 % 和 1.256 %。与 3pis 和 5pis 相比，multi-s 的平均功率密度分别增加了 0.687 % 和 1.256 %；multi-pis 的平均功率密度分别增加了 0.326 % 和 1.829 %。此外，多蛇形流场和平行流场的使用提高了反应物分布和电流密度的均匀性。本文进一步研究了在 0.45 V 工作电压下，入口湿度、工作温度和电源背压对这六个流场性能的影响。工作参数的变化对不同流场产生了不同程度的影响，多 s 和多 pis 流场的性能始终优于其他四个流场。本研究为 PEMFCs 的实施提供了实用指导，包括流场设计、运行的优化策略。

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Numerical investigation of PEMFC performance based on different multistage serpentine flow field designs

The design of excellent flow fields can significantly enhance the output current density and improve the uniformity of reactant distribution in PEMFC (Proton Exchange Membrane Fuel Cell). Serpentine flow field has gained more attention due to its outstanding performance and simple structure, but there is little research on multi-channel serpentine flow field considering the consumption of reactant. In this paper, flow fields named multi-s and multi-pis were designed by considering reactant consumption, and compared with the traditional serpentine flow fields including 3 s, 5 s, 3pis and 5pis. Compared with 3 s and 5 s, the average power density of multi-s increased by 0.687 % and 1.256 %, respectively. The average power density of multi-pis increased by 0.326 % and 1.829 %, as compared to that of 3pis and 5pis. Moreover, the utilization of multiple serpentine and parallel flow fields enhances the uniformity of reactant distribution and current density. The paper further investigates the impact of inlet humidity, operating temperature and supply back pressure on the performance of these six flow fields at a working voltage of 0.45 V. The variations of operating parameters exert varying degrees of influence on the different flow fields, multi-s and multi-pis flow fields consistently demonstrating superior performance to the other four flow fields. The present study offers practical guidance for the implementation of PEMFCs, encompassing optimization strategies for flow field design, operation.

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.