文献类型：期刊文献

英文题名：Transforming adverse effect into beneficial outcome: A design strategy leveraging non-uniform flow for enhanced performance of PEM fuel cells

作者：Wang, Bin[1,2,3];Pan, Weitong[1,2,3];Tian, Xinming[1,2,3];Tang, Longfei[1,2,3];Chen, Xueli[1,2,3];Wang, Fuchen[1,2,3]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Engn Res Ctr Resource Utilizat Carbon Containing W, Minist Educ, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Coal Liquefact Gasificat & Utilizat, Shanghai 200237, Peoples R China

年份：2026

卷号：406

外文期刊名：APPLIED ENERGY

收录：;EI(收录号：20255119759018);WOS:【SCI-EXPANDED(收录号:WOS:001649445200003)】；

基金：The research is supported by Shanghai YangFan Program (24YF2709200) and Fundamental Research Funds for the Central Uni-versity (JKCB1241216) .

语种：英文

外文关键词：Proton exchange membrane fuel cell; Channel refinement; Scale-up; Non-uniform flow; Cross-rib flow

摘要：Non-uniform flow in Proton Exchange Membrane (PEM) fuel cells with parallel flow fields can enhance performance, whereas a targeted regulation strategy has not been established. Hence, a systematic numerical investigation is conducted in this work. First, the impacts of channel dimensions on flow uniformity and cell performance are examined, accompanied by a sensitivity analysis. The core lies in the transverse cross-rib flow in the porous medium induced by non-uniform flow distribution. Building on this, a design strategy combining channel refinement and active area scale-up is proposed to facilitate the capability accumulation and release of this flow pattern, with the expectation of mitigating the inherently restricted reactant transport beneath ribs and thereby strengthening the electrochemical reaction. Second, this strategy is applied in the Manifold configuration. The current density improves from 1.49 % below to 13.49 % above that in the Uniform configuration. Flow non-uniformity rises, and the transverse cross-rib flow intensity increases markedly from 1.99 to 1078.85. The adverse effect of non-uniform flow is successfully transformed into a beneficial outcome. Third, the applicability of the proposed strategy is validated under different operational and geometric conditions, with the Manifold configuration consistently outperforming the Uniform configuration by more than 10 %. Furthermore, system efficiency and SWOT analyses are conducted to assess its prospects.