Numerical simulation and experimental study on the effect of symmetric and asymmetric bionic flow channels on PEMFC performance under gravity
Numerical simulation and experimental study on the effect of symmetric and asymmetric bionic flow channels on PEMFC performance under gravity
复制标题
重力作用下对称与非对称仿生流道对质子交换膜燃料电池性能影响的数值模拟与实验研究
DOI：
10.1016/j.ijhydene.2019.06.046
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发表时间：
2019
影响因子：
7.2
通讯作者：
Wu Chaoqun
中科院分区：
文献类型：
--
作者：
Liu Shihua;Chen Tao;Xie Yi;Zhang Jiwei;Wu Chaoqun
在质子交换膜燃料电池（PEMFC）中，仿生流场设计是将自然界的生物特性应用于流场的结构设计。仿生学设计的流场可以改善燃料电池的水平衡，使燃料在流场中分布均匀。为了研究重力作用下对称和非对称仿生流道的质子交换膜燃料电池性能，采用仿真和可视化实验的方法对不同朝向的仿生流道进行了研究。在重力的影响下，改变了液态水在流道中的分布特性，得到了重力作用下液态水在两种不同仿生流道中输运过程的差异。仿真和可视化实验结果表明，重力对仿生流道中液态水的输运过程有显著影响，两种类型仿生流道中的水输运过程有明显差异。同时，通过实验测试了具有两个不同方向仿生流道的燃料电池的性能。结果表明，重力对仿生流场PEMFC的性能有显著影响。对称仿生流道与非对称仿生流道对PEMFC性能的影响存在显著差异。I-V曲线结果表明，仿生流道不对称时，PEMFC的性能最好。
In proton exchange membrane fuel cell (PEMFC), bionic flow field design is to apply the biological characteristics of nature to the structure design of flow field. The flow field designed by bionics can improve the water balance of the fuel cell and make the fuel distribute uniformly in the flow field. In order to study the PEMFC performance of symmetric and asymmetric bionic flow channel under gravity, the simulation and visualization experiments are used to study the bionic flow channel in different orientations. Under the influence of gravity, the distribution characteristics of liquid water are changed in the flow channel, and the difference of the transport process of liquid water in two different bionic flow channel under gravity is obtained. The results of the simulation and visualization experiments show that the gravity has a significant effect on the transport process of liquid water in the bionic flow channel, and the water transport process in the two types of bionic flow channel is obviously different. Meanwhile, the performance of the fuel cells with two bionic flow channel at different orientations is tested by experiments. The results show that gravity has a significant effect on the performance of PEMFC with bionic flow field. And there are significant differences between symmetrical and asymmetric bionic flow channel on PEMFC performance. The results of I–V curve show that when the PEMFC with asymmetric bionic flow channel has the best performance in the orientation of perpendicularity.