|
|||||
|
|
Coupled mechanical stress and multi-dimensional CFD analysis for high temperature proton exchange membrane fuel cells (HT-PEMFCs) |
|
| Authors: | Purushothama Chippar Kyeongmin Oh Dongmin Kim Tae-Whan Hong Whangi Kim Hyunchul Ju |
| Affiliation: | 1. School of Mechanical Engineering, Inha University, 253 Yonghyun-Dong, Nam-Gu, Incheon 402-751, Republic of Korea;2. Department of Materials Science and Engineering, Hongik University, 300 Shinan, Yeongi, Chungnam 339-701, Republic of Korea;3. Department of Material Science and Engineering, Korea National University of Transportation, 50 Daehak-ro, Chungju, Chungbuk 380-702, Republic of Korea;4. Department of Applied Chemistry, Konkuk University, 322 Danwol-Dong, Chungju, Chungbuk 380-701, Republic of Korea |
| Abstract: | We use a combined finite element method (FEM)/computational fluid dynamics (CFD) methodology to numerically investigate the effects of gas diffusion layer (GDL) compression/intrusion on the performance of a phosphoric acid-doped polybenzimidazole (PBI) membrane-based high temperature proton exchange membrane fuel cell (HT-PEMFC). Three-dimensional (3-D) FEM simulations are conducted under various displacement clamping conditions to analyze cell deformation characteristics. Then, a multi-dimensional HT-PEMFC CFD model is applied to the deformed cell geometries to study transport and electrochemical processes during HT-PEMFC operations. Our numerical simulation results reveal that the maximum stresses in the deformed GDLs always occur near the edge of the ribs. The combined effects of GDL compression/intrusion considerably increase spatial non-uniformity in the species and current density distributions, and reduce cell performance. |
| Keywords: | Proton exchange membrane fuel cell Polybenzimidazole (PBI) Gas diffusion layer GDL compression GDL intrusion |
| 本文献已被 ScienceDirect 等数据库收录！ | |