Abstract
Liquid water agglomerations in the catalyst layer and microporouslayer of PEM fuel cells are simulated with a 3D Monte Carlomodel. The simulations are based on real material structures andlocally resolved operating conditions. The 3D material images areobtained from advanced experimental techniques capable of nm-scale imaging. The temperature and the relative humidity profilesare provided by a computational fluid dynamics simulation, basedon a single channel fuel cell model taking into account all relevanttransport and electrochemical processes. The results of this MonteCarlo study confirm the strong dependency of the water saturationin the catalyst layer and microporous layer on the structuralparameters and operating conditions, such as: wettability, pore sizeand local temperature and relative humidity.
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