Numerical analysis on effect of aspect ratio of planar solid oxide fuel cell fueled with decomposed ammonia
| Autor: | Janusz S. Szmyd, Grzegorz Brus, Hiroshi Iwai, Wee Choon Tan, Hideo Yoshida, Masashi Kishimoto |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment 05 social sciences Oxide Energy Engineering and Power Technology 02 engineering and technology 021001 nanoscience & nanotechnology Aspect ratio (image) Endothermic process chemistry.chemical_compound Ammonia Stack (abstract data type) chemistry Chemical engineering Thermal radiation 0502 economics and business Mass flow rate Solid oxide fuel cell 050207 economics Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Power Sources. 384:367-378 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2018.03.011 |
| Popis: | Planar solid oxide fuel cells (SOFCs) with decomposed ammonia are numerically studied to investigate the effect of the cell aspect ratio. The ammonia decomposer is assumed to be located next to the SOFCs, and the heat required for the endothermic decomposition reaction is supplied by the thermal radiation from the SOFCs. Cells with aspect ratios (ratios of the streamwise length to the spanwise width) between 0.130 and 7.68 are provided with the reactants at a constant mass flow rate. A parametric study is conducted by varying the cell temperature and fuel utility factor to investigate their effects on the cell performance in terms of the voltage efficiency. The effect of the heat supply to the ammonia decomposer is also studied. The developed model shows good agreement, in terms of the current-voltage curve, with the experimental data obtained from a short stack without parameter tuning. The simulation study reveals that the cell with the highest aspect ratio achieves the highest performance under furnace operation. On the other hand, the 0.750 aspect ratio cell with the highest voltage efficiency of 0.67 is capable of thermally sustaining the ammonia decomposers at a fuel utility of 0.80 using the thermal radiation from both sidewalls. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect