Performance investigation on a novel 3D wave flow channel design for PEMFC |
| |
| Authors: | Xi Chen Zhengkun Yu Chen Yang Yao Chen Chao Jin Yuejiao Ding Wenbin Li Zhongmin Wan |
| |
| Affiliation: | 1. College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang, 414006, China;2. College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, Fujian, China;3. School of Information Science and Engineering, Central South University, Changsha, 410082, China |
| |
| Abstract: | Flow field structure can largely determine the output performance of Polymer electrolyte membrane fuel cell. Excellent channel configuration accelerates electrochemical reactions in the catalytic layer, effectively avoiding flooding on the cathode side. In present study, a three-dimensional, multi-phase model of PEMFC with a 3D wave flow channel is established. CFD method is applied to optimize the geometry constructions of three-dimensional wave flow channels. The results reveal that 3D wave flow channel is overall better than straight channel in promoting reactant gases transport, removing liquid water accumulated in microporous layer and avoiding thermal stress concentration in the membrane. Moreover, results show the optimal flow channel minimum depth and wave length of the 3D wave flow channel are 0.45 mm and 2 mm, respectively. Due to the periodic geometric characteristics of the wave channel, the convective mass transfer is introduced, improving gas flow rate in through-plane direction. Furthermore, when the cell output voltage is 0.4 V, the current density in the novel channel is 23.8% higher than that of conventional channel. |
| |
| Keywords: | PEMFC Three-dimensional wave channel CFD simulation Enhancing mass transfer |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
