Numerical simulation of intermediate‐temperature disk type seal‐less SOFC fed with partially reformed methane
Numerical simulation of intermediate‐temperature disk type seal‐less SOFC fed with partially reformed methane
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DOI：
10.1002/tee.21897
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发表时间：
2013-11
影响因子：
1
通讯作者：
Tadashi Tanaka;Y. Inui;N. Chitose
中科院分区：
文献类型：
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作者：
Tadashi Tanaka;Y. Inui;N. Chitose
由于以甲烷为主要成分的天然气是固体氧化物燃料电池（SOFC）最有前途的燃料，因此开发一套适用于甲烷燃料情况的中温盘式无密封SOFC的数值模拟程序被认为是非常有用的。因此，在这项研究中，我们开发了一个新的模拟代码，这种类型的固体氧化物燃料电池的单电池单元的部分重整甲烷作为燃料气体进料的基础上，现有的纯氢的模拟代码。我们计算的电流密度与单电池电压（i-V）曲线的单电池单元的各种情况下，具有广泛的电池温度和预重整温度条件，并将它们与相应的实验结果进行比较。从结果中，我们确认，数值计算得到的i-V曲线吻合得很好，在所有情况下与相应的实验。的i-V曲线的变化，这不仅取决于电池温度，但也对预重整温度，成功地模拟了足够高的精度，表明新开发的模拟代码的有效性。通过数值模拟得到的燃料通道内气体分压分布和电池内能斯特势分布，详细研究了电池温度和预转化器温度对电池性能的影响，阐明了在电池温度较低时预转化器温度对电池性能影响明显的原因，尽管当电池温度高时电池性能几乎与预重整器温度无关。© 2013日本电气工程师协会。由John Wiley & Sons公司出版
Since natural gas containing methane as major component is the most promising fuel for the solid oxide fuel cell (SOFC), development of a numerical simulation code of the intermediate‐temperature disk‐type seal‐less SOFC for methane fuel case is considered to be very useful. In this study, therefore, we develop a new simulation code for the single cell unit of this type of SOFC fed with partially reformed methane as the fuel gas, based on the existing simulation code for pure hydrogen. We calculate the current density versus single cell voltage (i–V ) curves of the single cell unit for various cases with a wide range of the cell temperature and prereformer temperature conditions and compare them with the corresponding experimental results. From the results, we confirm that the numerically obtained i–V curves coincide very well with the corresponding experimental ones in all cases. The variations of the i–V curves, which depend not only on the cell temperature but also on the prereformer temperature, are successfully simulated with a sufficiently high accuracy, indicating the validity of the newly developed simulation code. We also investigate the detailed influence of the cell temperature and prereformer temperature on the cell performance on the basis of the numerically obtained gaseous partial pressure profiles in the fuel channel and Nernst potential profiles in the cell, and clarify the reason why the prereformer temperature has obvious influence on the cell performance when the cell temperature is low, though the cell performance is almost independent of the prereformer temperature when the cell temperature is high. © 2013 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.