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Numerical analysis on effect of aspect ratio of planar solid oxide fuel cell fueled with decomposed ammonia

机译:氨分解的平面固体氧化物燃料电池长径比影响的数值分析

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摘要

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.
机译:数值研究了具有分解的氨的平面固体氧化物燃料电池(SOFC),以研究电池纵横比的影响。假定氨分解剂位于SOFC旁边,吸热分解反应所需的热量由来自SOFC的热辐射提供。长宽比(沿流向的长度与跨向的宽度之比)在0.130和7.68之间的单元将以恒定的质量流率提供反应物。通过改变电池温度和燃料利用率来进行参数研究,以研究它们对电池效率的影响(电压效率)。还研究了向氨分解器供热的影响。在电流-电压曲线方面,所开发的模型与从短堆栈中获得的实验数据(无需进行参数调整)显示出良好的一致性。仿真研究表明,纵横比最大的单元在炉子操作下可获得最高的性能。另一方面,具有最高电压效率为0.67的0.750长宽比电池能够利用来自两个侧壁的热辐射将氨分解器热维持在0.80的燃料利用率下。

著录项

  • 来源
    《Journal of power sources》 |2018年第30期|367-378|共12页
  • 作者单位

    Kyoto Univ, Dept Aeronaut & Astronaut, Nishikyo Ku, Kyoto 6158540, Japan;

    Kyoto Univ, Dept Aeronaut & Astronaut, Nishikyo Ku, Kyoto 6158540, Japan;

    Kyoto Univ, Dept Aeronaut & Astronaut, Nishikyo Ku, Kyoto 6158540, Japan;

    AGH Univ Sci & Technol, Dept Fundamental Res Energy Engn, PL-30059 Krakow, Poland;

    AGH Univ Sci & Technol, Dept Fundamental Res Energy Engn, PL-30059 Krakow, Poland;

    Kyoto Univ, Dept Aeronaut & Astronaut, Nishikyo Ku, Kyoto 6158540, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    SOFC; Simulation; Aspect ratio; Decomposed ammonia; Fuel utility factor; Voltage efficiency;

    机译:SOFC;模拟;纵横比;分解氨气;燃料利用率;电压效率;
  • 入库时间 2022-08-18 00:21:25

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