Optimal design of the transition zone structure of fuel cell plate
To solve the problem of uneven fuel distribution in the reaction zone flow channel of proton exchange membrane fuel cells(PEMFC),computational fluid dynamics method is used to simulate the fuel flow in the flow channel.The coefficient of variation is used to evaluate different schemes,and the effects of cylinder volume ratio,cylinder arrangement,cylinder to channel distance,and cylinder porosity on fuel distribution uniformity in the transition zone are studied.The research results indicate that the fuel distribution uniformity using cylindrical flow guide is better than that using flow guide channels.The transition zone cylinders are arranged in a square shape for optimal distribution uniformity.By increasing the distance between the cylinder and the flow channel,the fuel distribution uniformity in each channel shows a trend of first increasing and then decreasing.The uniformity is better when the distance is 3 mm.When the porosity of the transition zone is about 11.4％,the fuel distribution uniformity is better.Both too large and too small can cause a deterioration of the distribution uniformity.
PEMFCelectrode platenumerical simulationflow field designperformance optimization
NETL
NSTL
万方数据
