质子交换膜燃料电池点阵型流场性能仿真OA
Simulation study of lattice flow fields in PEMFCs
质子交换膜燃料电池流道结构对反应气体流动、热交换、电化学反应具有重要影响.针对常见流道中反应气体分布不均,液态水管理和输出性能等问题,设计了3种点阵型流场.建立了传统平行流场和点阵型流场的三维质子交换膜燃料电池几何模型,并对比了输出性能、氧气运输阻力、氧气摩尔浓度均匀性系数、氧气分布和液态水饱和度.结果表明,相比传统平行流场,3种点阵型流场的输出性能均高于传统平行流场,峰值功率密度增加24.74%,点阵型流场的氧气运输阻力显著小于传统平行流场,氧气摩尔浓度均匀性系数显著大于传统平行流场.同时点阵型流场能明显改善电池内部氧气分布的均匀性和液态水管理,有望为燃料电池流道结构创新提供新的思路.
The flow field structure of proton exchange membrane fuel cells(PEMFCs)plays a critical role in regulating reactant transport,heat dissipation,and electrochemical reactions.To address challenges commonly observed in conventional flow channels,such as non-uniform reactant distribution,insufficient liquid water management and limited output performance,three types of lattice flow fields were newly designed.Three-dimensional PEMFC models featuring both traditional parallel and lattice-type flow fields was established,and their output performance,oxygen transport resistance,oxygen molar concentration uniformity,oxygen distribution,and liquid water saturation were comparatively analyzed.Results show that,compared with the traditional parallel flow field,all three lattice designs exhibited improved performance,achieving a maximum increase of 24.74% in peak power density.The lattice flow fields also demonstrated significantly lower oxygen transport resistance,higher oxygen concentration uniformity,and enhanced internal oxygen distribution and liquid water management.These findings provides a promising direction for innovative PEMFC flow filed design.
封士明;邹林海;张焱;万忠民
湖南理工学院 机械工程学院,湖南 岳阳 414006湖南理工学院 机械工程学院,湖南 岳阳 414006湖南理工学院 机械工程学院,湖南 岳阳 414006湖南理工学院 机械工程学院,湖南 岳阳 414006
信息技术与安全科学
质子交换膜燃料电池结构设计数值模拟点阵型流场
proton exchange membrane fuel cell(PEMFC)flow field designnumerical simulationlattice flow field
《重庆大学学报》 2026 (1)
51-59,9
湖南省自然科学基金资助项目(2021JJ30302)湖南省教育厅科学研究重点项目(20A216).Supported by Natural Science Foundation of Hunan Province(2021JJ30302),and Key Scientific Research Project of Hunan Education Department(20A216).
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