Effect of flow fields with horizontal baffle on performance and mass transport of fuel cells
Incorporating microstructures within the flow channels of proton exchange membrane fuel cell(PEMFC)can enhance mass transport capability from channels to the catalyst layer and improve cell performance.The model with installation of staggered baffles and opposing baffles is established,it is concluded that the staggered arrangement is more favorable for enhancing cell performance.Models with four different kinds of blockage ratio are created,it is found that as the blockage ratio increases,both the maximum net power density and the limiting current density of the cell increase.The net power density of the 95%blockage ratio model is the highest,at 1.053 W/cm2,which represents a 14.58%increase compared to the model without baffles.No significant concentration polarization is observed up to a current density of 2.8 A/cm2.By varying the baffle angle,the highest net power density of the cell is achieved when the angle is 15°,considering a balance between mass transport capability and pumping losses.
proton exchange membrane fuel cell(PEMFC)microstructurecathode channelbafflenet power densityarrangementblockage ratioangle
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维普
