Investigation of PEM fuel cell performance using the bio-inspired flow field combined with baffles on branch channels

Abstract

Fuel cell is one of the energy conversion devices that can be an alternative to dealing with fossil energy depletion and environmental issues. The aim of this study is to determine the effect of baffles on branch channels on leaf shape flow fields towards PEM fuel cell performance. Numerical studies were applied to 3d models with 25 cm2 active area. The distance between baffles in the branch channel is varied with the height of the baffles as a reference. The results show that the shorter the distance between baffles, the higher the current density and pressure drop produced. However, a decrease in pressure drop occurs at a distance of 20h.