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In this work, a three-dimensional Computational Fluid Dynamics (CFD) model is proposed and employed to investigate the effects of the channel pattern taking stair walk forms on the power density, pressure, and local transport phenomena of a single cell of Proton Exchange Membrane Fuel Cell (PEMFC) with straight channels (SC). The results obtained from the conducted investigation, using ANSYS-FLUENT software, have presented a best concordance with the experimental results of the literature. From the obtained results, it appears that the introduction of three stairs walks (SW) along the anode and cathode channels permits both gases to better flow through the gas diffusion layers, with a remarkable velocity near the electrodes/channels ends compared to the whole configuration studied. In addition, the stair walks’ introduction to the channels’ conceptions permits enhancement of the maximum delivered power density by 1.69% compared to the conventional PEMFC-SC without stair walk. However, the considerable differences in pressure drop due to the changing happened in the flow path resulting in more pumping power needed to enrich the flow among the channel, and finally concluded that the use of stairs walks has a negative impact on the net power densities of the PEMFC-SC.

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Investigation, Analysis and Geometrical Optimization of the PEMFC Channel Path

  • 章节

  • 发表日期：

    2025年

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  • Youcef Sahli,
  • Abdallah Mohammedi,
  • Hocine Moungar,
  • Mohammed Benhammou

摘要

In this work, a three-dimensional Computational Fluid Dynamics (CFD) model is proposed and employed to investigate the effects of the channel pattern taking stair walk forms on the power density, pressure, and local transport phenomena of a single cell of Proton Exchange Membrane Fuel Cell (PEMFC) with straight channels (SC). The results obtained from the conducted investigation, using ANSYS-FLUENT software, have presented a best concordance with the experimental results of the literature. From the obtained results, it appears that the introduction of three stairs walks (SW) along the anode and cathode channels permits both gases to better flow through the gas diffusion layers, with a remarkable velocity near the electrodes/channels ends compared to the whole configuration studied. In addition, the stair walks’ introduction to the channels’ conceptions permits enhancement of the maximum delivered power density by 1.69% compared to the conventional PEMFC-SC without stair walk. However, the considerable differences in pressure drop due to the changing happened in the flow path resulting in more pumping power needed to enrich the flow among the channel, and finally concluded that the use of stairs walks has a negative impact on the net power densities of the PEMFC-SC.