|Title:||Modelling the effects of using gas diffusion layers with patterned wettability for advanced water management in proton exchange membrane fuel cells|
|Authors :||Dujc, Jaka|
|Published in :||Journal of Electrochemical Energy Conversion and Storage|
|Publisher / Ed. Institution :||The American Society of Mechanical Engineers|
|License (according to publishing contract) :||Licence according to publishing contract|
|Type of review:||Peer review (Publication)|
|Subjects :||Modeling; Water management; Patterned GDL; Proton exchange membrane fuel cells|
|Subject (DDC) :||621.3: Electrical engineering and electronics|
|Abstract:||We present a macrohomogeneous two-phase model of a pro- ton exchange membrane fuel cell (PEFC). The model takes into account the mechanical compression of the gas diffusion layer (GDL), the two-phase flow of water, the transport of the gas species and the electrochemical reaction of the reactand gases. The model was used to simulate the behavior of a PEFC with a patterned GDL. The results of the reduced model, which considers only the mechanical compression and the two-phase flow, are compared to the experimental ex-situ imbibition data obtained by neutron radiography imaging. The results are in good agreement. Additionally, by using all the model features, a simulation of an operating fuel cell has been performed to study the intricate couplings in an operating fuel cell and to examine the patterned GDL effects. The model confirms that the patterned GDL design liberates the pre-defined domains from liquid water and thus locally increases the oxygen diffusivity.|
|Departement:||School of Engineering|
|Organisational Unit:||Institute of Computational Physics (ICP)|
|Publication type:||Article in scientific Journal|
|Appears in Collections:||Publikationen School of Engineering|
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