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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental and numerical investigation of obstacle effect on the performance of PEM fuel cell
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Experimental and numerical investigation of obstacle effect on the performance of PEM fuel cell

机译：障碍物对PEM燃料电池性能影响的实验与数值研究

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摘要

Fuel cells are an alternative energy technology that generates electric energy through the reaction between hydrogen and oxygen. These devices are particularly interesting due to high efficiencies relative to traditional combustion engines and low emissions, producing only heat and water as waste products. One of the key parameters in designing this type of fuel cell is the shape and dimensions of gas flow field channels on the bipolar plates. In this research, the obstacle is simulated by selecting the obstacle geometry in the channel path, and after choosing the best range (height), the best obstacle width is analyzed to have better performance. The simulation is done for the non-obstacle case and obstacles with 0.5, 1, 1.5 and 2 mm heights and 0.9, 1.8, 2.7 and 3.6 mm widths, respectively. The obtained results for PEMFC show that the height of 1.5 mm and the width of 3.6 mm have the highest impact on the fuel cell efficiency regarding species consumption, pressure drop and current density. Furthermore, for the best geometry dimension and arrangement of obstacles four types of obstacle including triangular, cylindrical, square and trapezoidal are simulated. Finally fuel cell with triangular and square obstacles as optimum flow field is designed, manufactured and tested. The results have shown that using a triangular obstacle at a voltage of 0.6 V, the current density is increased by more than 50% compared to unobstructed. (C) 2019 Elsevier Ltd. All rights reserved.
机译：燃料电池是一种替代能源技术，可通过氢与氧之间的反应产生电能。由于相对于传统内燃机效率高且排放低，仅产生热量和水作为废品，因此这些设备特别有趣。设计这种类型的燃料电池的关键参数之一是双极板上的气流场通道的形状和尺寸。在这项研究中，通过选择通道路径中的障碍物几何形状来模拟障碍物，并在选择最佳范围（高度）之后，分析最佳障碍物宽度以具有更好的性能。对非障碍情况和高度分别为0.5、1、1.5和2毫米，宽度为0.9、1.8、2.7和3.6毫米的障碍物进行了仿真。 PEMFC的所得结果表明，在物种消耗，压降和电流密度方面，高度1.5 mm和宽度3.6 mm对燃料电池效率的影响最大。此外，为了获得最佳的障碍物几何尺寸和布置，模拟了四种障碍物，包括三角形，圆柱形，正方形和梯形。最后，设计，制造和测试了具有三角形和正方形障碍物作为最佳流场的燃料电池。结果表明，在电压为0.6 V的情况下使用三角形障碍物，与无障碍相比，电流密度增加了50％以上。 （C）2019 Elsevier Ltd.保留所有权利。

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