CFD Simulation and Performance Investigation on a Novel Bionic Spider-Web-Type Flow Field for PEM Fuel Cells
CFD Simulation and Performance Investigation on a Novel Bionic Spider-Web-Type Flow Field for PEM Fuel Cells
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DOI：
10.3390/pr9091526
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发表时间：
2021-08
期刊：
影响因子：
3.5
通讯作者：
Qi Xie;Minggang Zheng
中科院分区：
文献类型：
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作者：
Qi Xie;Minggang Zheng
质子交换膜燃料电池（PEMFC）中电化学反应产生的产物主要集中在双极板阴极侧的流场中，阴极上引入的氧气对利用流场结构提高其扩散性能有更高的要求。因此，质子交换膜燃料电池阴极流场的优化设计是至关重要的。受蜘蛛网结构的启发，本文提出了一种新型的蜘蛛网型流场。在这种流场中，多边形结构的形状和螺旋流道的层数是两个最关键的变量。为了探讨这两个变量对阴极流场的影响，建立了不同这两个变量值的完整的三维PEMFC模型，并采用CFD方法对模型进行了模拟。通过观察不同方案的氧分布结果、除水性能和燃料电池输出性能，确定了多边形结构和层数的最佳方案。通过与传统流场的对比，证明了优化方案对改善质子交换膜燃料电池阴极流场性能的可行性。
The products generated by the electrochemical reaction in the PEM fuel cell (PEMFC) are mainly concentrated in the flow field on the cathode side of the bipolar plate, and the oxygen introduced on the cathode has higher requirements to improve its diffusion performance by using the flow field structure. For this reason, the optimization of the cathode flow field of the PEMFC is essential. Inspired by the structure of a spider web, this paper proposes a novel spider-web-type flow field. In this kind of flow field, the shape of a polygonal structure and the number of layers of spiral flow channels are the two most crucial variables. In order to explore the impact of these two variables on the cathode flow field, complete three-dimensional PEMFC models with different values of the two variables were established, and the models were simulated by the method of CFD. By observing the results of oxygen distribution, the water removal performance and fuel cell output performance of different schemes, the optimal scheme of the polygonal structure and layer number are determined. Compared with the traditional flow field, it is proved that the optimization scheme is desirable in improving the performance of the cathode flow field in PEMFC.