摘要
流道非均匀设计是改善质子交换膜燃料电池(PEMFC)内部物理场不均匀分布的最主要方式之一。已有研究设计思路主要是基于对PEMFC工作原理的定性理解确定设计方向,再在此设计方向上进行参数优化,而未能把所得结果反馈用于修正设计思路。对此提出了一种结果反馈再寻优的设计思路,首先对PEMFC结构参数进行参数分析,再对计算结果中物质输运过程进行定量分析,从而反馈确定结构设计方向。采用上述思路对单通道PEMFC流道宽度、单电池子流道高度进行了非均匀设计。结果表明:相比于对照组,采用非均匀设计的PEMFC净功率密度提升幅度为4%~6%,且PEMFC内物理场分布均匀性较好。该研究能够指导PEMFC流道结构不均匀设计方向,助力高性能、长寿命PEMFC设计。
Non-uniform design of flow channels is one of the most important ways to improve the uneven distribution of physical fields inside proton exchange membrane fuel cells(PEMFCs).Existing design ideas mainly rely on a qualitative understanding of PEMFC to determine the design direction and further optimizing of parameters in this design direction.Feedback from the obtained results is not used to correct the design ideas.Therefore,a result feedback and then optimization design approach was proposed.In this approach,the structural parameters of PEMFC were first analyzed,and then the species transport processes in the calculation results were quantitatively analyzed to determine the structural design direction.Using the proposed approach,non-uniform designs were carried out for the channel width of single-channel PEMFC and the sub-channel height of single cell.Results show that compared to the base case,the net power density of PEMFC with non-uniform designs is increased by 4%-6%,and the uniformity of physical field distribution inside PEMFC becomes better.This study can provide guidance for the design direction of non-uniform PEMFC channel structure,and contribute to the development of high-performance and long-life PEMFC.
作者
尧兢
吴震
杨福胜
张早校
YAO Jing;WU Zhen;YANG Fusheng;ZHANG Zaoxiao(School of Chemical Engineering and Technology,Xi'an Jiaotong University,Xi'an 710049,Shaanxi Province,China)
出处
《动力工程学报》
北大核心
2025年第2期253-262,共10页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(52176203)
陕西省重点研发计划资助项目(2023-GHZD-13)。
关键词
燃料电池
不均匀反应
性能优化
流道设计
fuel cell
non-uniform reaction
performance optimization
flow field design
作者简介
尧兢(1996-),男,江西抚州人,博士研究生,研究方向为金属氢化物储氢及燃料电池系统;通信作者:吴震,男,教授,博士生导师,E-mail:wuz2015@mail.xjtu.edu.cn。
