Investigation and equalisation of the flow distribution in a fuel cell stack
Investigation and equalisation of the flow distribution in a fuel cell stack
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DOI：
10.1016/j.jpowsour.2019.227546
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发表时间：
2020-02
影响因子：
9.2
通讯作者：
F. Bürkle;F. Moyon;L. Feierabend;J. Wartmann;A. Heinzel;J. Czarske;L. Büttner
中科院分区：
文献类型：
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作者：
F. Bürkle;F. Moyon;L. Feierabend;J. Wartmann;A. Heinzel;J. Czarske;L. Büttner
使用燃料电池作为电源的可能性使它们在广泛的应用中变得有趣。在这项工作中，计算流体动力学(CFD)模拟和光学测量被用来预测类似于燃料电池堆中平行流动回路的流动装置中的流动分布。通过模型实验首次表明，通过将进气歧管中的端口尺寸与单个燃料电池相适应，流量之间的平均全局偏差可以从10.1%减小到4.0%。测量使用了专门为小规模通道测量而开发的高分辨率激光多普勒速度剖面传感器(LD-PS)，在本工作中为4×1 mm 2，允许空间分辨率低于2μm，相对速度不确定度低于0.1%，有助于解决燃料电池可能出现的安装影响，以提高其效率。提出的结果可供制造商用于提高其燃料电池组的效率。
The possibility to use fuel cells as an electrical power source makes them interesting for a wide range of applications. In this work, computational fluid dynamics (CFD) simulations and optical measurements are performed to predict the flow distribution in a flow setup resembling the parallel flow circuits in fuel cell stacks. For the first time it is shown that by an adaptation of the port sizes in the inlet manifold to the individual fuel cells, the average global deviation between the flow rates can be reduced from 10.1% to 4.0% by means of a model experiment. The measurements are performed with a high resolution laser Doppler velocity profile sensor (LD-PS) specifically developed for measurements in small-scale channels, in this work 4× 1 mm 2, allowing for a spatial resolution below 2 μ m and relative velocity uncertainties below 0.1%, helping to resolve installation effects possibly occurring in fuel cells to improve their efficiency. The presented results can be used by manufacturers to increase the efficiency of their fuel cell stacks.