End plate design and simulation for uniform stacking pressure distribution for thin metallic PEMFC
| Autor: | Shih-Wei Cheng, 程世偉 |
|---|---|
| Rok vydání: | 2007 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 96 The pressure distribution of fuel cell stack assembly may greatly affect the cell performance. Because of the better mechanical properties of metals, thin metallic bipolar plates tend to deform more easily under un-even stacking pressure.In this study, various designs of end plates were studied and analyzed by FEM for pressure distribution and GDL compliance. Experiments were also conducted and by measuring pressure distribution of pressure films to verify the numerical analyses results. A fuel cell stack is assembled based on the best end plate design from FEM simulation and experiments. The pressure distribution of each cell can be measured by replacing the membrane with pressure film. The GDL compliance values were also measured. In order to check the validity of the simulation model, these measurement data were compared with the simulation results. Hence, the simulation procedures were established for future thin metallic PEM fuel cell stacking parameters and end plate design. Finally, the performance of single cells are compared. The results show that the stack assembly design has great effects on cell performance. The assembly design of placing a thin elastic silicon pad between the end plates and bipolar plates provide the most uniform pressure distribution and significant improvement on cell performance. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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