流道宽度和脊宽度对燃料电池极板流通特性的影响
刘斌,白书战*
山东大学 能源与动力工程学院,山东 济南 250061
摘要:为研究蛇形流道结构燃料电池流道宽度和脊宽度对燃料电池极板流道流通特性的影响,运用多物理场仿真软件Comsol对不同流道宽度和脊宽度的蛇型流道结构进行仿真,分析流道宽度和脊宽度对流道压降和流道内流体质量流量的影响。结果表明:脊宽度对流道压降和流体质量流量分布的影响小于流道宽度的影响;增大流道宽度可以降低流道压降,增大流道内流体的质量流量;增大脊宽度可以使质量流量小幅减小。综合考虑流道宽度和脊宽度对压降和流体质量流量分布的影响,应在合理范围内尽量增大流道宽度,且脊宽度不应过小。
关键词:燃料电池;双极板;流道宽度;脊宽度;压降;流量分布
Influence of channel width and ridge width on flow characteristics of fuel cell electrode plate
LIU Bin, BAI Shuzhan*
School of Energy and Power Engineering,Shandong University,Jinan 250061,China
Abstract:In order to study the influence of channel width and ridge width on the flow characteristics of fuel cell electrode plate channel, multi-physical field simulation software Comsol is used to simulate the snake channel structure with different channel width and ridge width, and analyze the convection-inlet pressure drop and the mass flow of gas in the channel with channel width and ridge width. The results show that increasing the width of the passage could reduce the pressure drop at the inlet and outlet of the passage and increase the mass flow rate of gas in the passage. The mass flow rate decreases slightly with the increase of ridge width. The influence of ridge width on pressure drop and flow distribution is less than that of channel width. Considering the influence of channel width and ridge width on pressure drop and flow distribution, the channel width should be increased within a reasonable range, and the ridge width should not be too small.
Keywords:fuel cell;double electrode plate;runner width;ridge width;pressure drop;flow distribution