کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1272179 | 1497479 | 2014 | 6 صفحه PDF | دانلود رایگان |
• Neutron radiographs were used to study the water distribution in a 50 cm2 PEMFC.
• The cross-flow flow field channels design was identified in the distributions.
• The back-diffusion transport mechanism was clearly observed in the distributions.
Back-diffusion in PEM fuel cells is the water transport mechanism contributing to balance the water content profile in the membrane (in the through-plane direction), transporting water molecules from the cathode electrode towards the anode side of the membrane. In this technical note, neutron radiographs are presented for a 50 cm2 N-117 fuel cell with serpentine flow field, where the effect of the back diffusion transport mechanism is clearly identified, in the form of crossed patterns following the cross-flow layout of the flow field. The back diffusion water transport is evident despite the high thickness of the N-117 membrane.
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 30, 13 October 2014, Pages 17240–17245