Adaptable design of parallel-leaf vein stratified flow field under different inlet and outlet arrangements in PEM fuel cells

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2025-05-27 DOI:10.1016/j.electacta.2025.146557

Bin Wang, Weitong Pan, Zichao Hu, Longfei Tang, Xueli Chen, Fuchen Wang

{"title":"Adaptable design of parallel-leaf vein stratified flow field under different inlet and outlet arrangements in PEM fuel cells","authors":"Bin Wang, Weitong Pan, Zichao Hu, Longfei Tang, Xueli Chen, Fuchen Wang","doi":"10.1016/j.electacta.2025.146557","DOIUrl":null,"url":null,"abstract":"A well-designed flow field is crucial for the uniformity and output performance of Proton Exchange Membrane (PEM) fuel cells. Nevertheless, both manifold and transition zone designs have remained limitations, and a universal strategy for optimizing uniformity under different inlet and outlet conditions has not been developed. Therefore, a three-dimensional two-phase numerical model of PEM fuel cells is constructed in this work. A novel philosophy-stratified flow field-is proposed, derived from which symmetrical half and symmetric Parallel-Leaf Vein Stratified Flow Fields (PLVSFFs) are presented. Firstly, the transfer-reaction characteristics of PLVSFFs are elucidated. The symmetric half and symmetric designs facilitate reactant delivery from one side to the other and from both sides to the center, respectively. Secondly, the effects of different inlet and outlet arrangements, namely Left In-Left Out (LILO), Left in-Right Out (LIRO), and Left-Right In-Left-Right Out (LRILRO), are explored. Low reactant concentrations are observed in the right region, center, and center, respectively. Thirdly, the adaptable design is performed, with symmetric half, symmetric, and symmetric PLVSFFs applied to the three inlet and outlet layouts, respectively. Compared to the PFF, the output performance is enhanced by 30.70%, 8.17%, and 8.14%, while reactant uniformity is improved by 39.89%, 15.15%, and 16.71%, respectively. The drainage capability is also enhanced. The Parallel Flow Field (PFF) and Leaf Vein Flow Field (LVFF) play the roles of fundamental transport and optimized control, respectively. Finally, the superior impacts of this novel stratified flow field are validated via the application under different geometric and operational conditions and the evaluation of net output performance.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"239 1","pages":"146557"},"PeriodicalIF":5.5000,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrochimica Acta","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.electacta.2025.146557","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}

引用次数: 0

Abstract

A well-designed flow field is crucial for the uniformity and output performance of Proton Exchange Membrane (PEM) fuel cells. Nevertheless, both manifold and transition zone designs have remained limitations, and a universal strategy for optimizing uniformity under different inlet and outlet conditions has not been developed. Therefore, a three-dimensional two-phase numerical model of PEM fuel cells is constructed in this work. A novel philosophy-stratified flow field-is proposed, derived from which symmetrical half and symmetric Parallel-Leaf Vein Stratified Flow Fields (PLVSFFs) are presented. Firstly, the transfer-reaction characteristics of PLVSFFs are elucidated. The symmetric half and symmetric designs facilitate reactant delivery from one side to the other and from both sides to the center, respectively. Secondly, the effects of different inlet and outlet arrangements, namely Left In-Left Out (LILO), Left in-Right Out (LIRO), and Left-Right In-Left-Right Out (LRILRO), are explored. Low reactant concentrations are observed in the right region, center, and center, respectively. Thirdly, the adaptable design is performed, with symmetric half, symmetric, and symmetric PLVSFFs applied to the three inlet and outlet layouts, respectively. Compared to the PFF, the output performance is enhanced by 30.70%, 8.17%, and 8.14%, while reactant uniformity is improved by 39.89%, 15.15%, and 16.71%, respectively. The drainage capability is also enhanced. The Parallel Flow Field (PFF) and Leaf Vein Flow Field (LVFF) play the roles of fundamental transport and optimized control, respectively. Finally, the superior impacts of this novel stratified flow field are validated via the application under different geometric and operational conditions and the evaluation of net output performance.

查看原文本刊更多论文

PEM燃料电池不同进出口布置下平行叶脉层状流场的适应性设计

设计良好的流场对质子交换膜（PEM）燃料电池的均匀性和输出性能至关重要。然而，歧管和过渡区的设计仍然存在局限性，并且尚未开发出在不同进出口条件下优化均匀性的通用策略。为此，本文建立了PEM燃料电池的三维两相数值模型。提出了一种新的分层流场理论，在此基础上提出了对称半叶脉分层流场和对称平行叶脉分层流场。首先，阐述了plvsff的转移反应特性。对称半对称和对称设计分别有利于反应物从一侧输送到另一侧和从两侧输送到中心。其次，探讨了不同进出口安排的影响，即左内-左外（LILO），左内-右外（LIRO）和左-右内-左-右外（LRILRO）。在右侧区域、中心和中心分别观察到低反应物浓度。第三，进行自适应设计，将对称半、对称和对称plvsff分别应用于三种进出口布局。与PFF相比，输出性能分别提高了30.70%、8.17%和8.14%，反应物均匀性分别提高了39.89%、15.15%和16.71%。排水能力也得到增强。平行流场（PFF）和叶脉流场（LVFF）分别起着基本输运和优化控制的作用。最后，通过在不同几何和操作条件下的应用以及净输出性能的评估，验证了该新型分层流场的优越效果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.