3D modeling of a 200 cm2 HT-PEFC short stack

3D analysis, modeling and simulation of transport processes in compressed fibrous microstructures, using the Lattice Boltzmann method

“…In modeling approaches of fuel cells or even stacks the GDL is often considered as a homogeneous medium with effective homogenized transport properties. With this approach Kvesić et al were able to simulate the behavior of entire HT-PEFC stacks by embedding user defined functions for the electrochemical reactions into commercial CFD software [12,13]. Also based on effective transport properties, the effect of different compression levels of the GDL was studied by Olesen et al [14] by means of CFD.…”

3D modeling of an HT-PEFC stack using reformate gas

“…To cover the entire range of scales in the CFD model a combination of different scales is necessary. The CFD model applied in this work is based on a previously published stack model for hydrogen/air operation [13]. In this model the stack manifolds are considered separately from the body of the stack.…”

“…In this model the stack manifolds are considered separately from the body of the stack. The obtained results allow to assume a uniform distribution of reactant gases into the cells, which will serve as mass-flowinlet boundary condition in this model (for details see [13]). The overall geometry of the stack is shown in Fig.…”

“…Besides well-known experimental methods and post-processing of detailed 3D simulations, a quantification of the current homogeneity is presented. The starting point is an already existing stack model for hydrogen/air operation [13].…”

3D Modeling of One and Two Component Gas Flow in Fibrous Microstructures in Fuel Cells by Using the Lattice-Boltzmann Method

“…The dimension of the simulated region also influences the choice of the model. In order to simulate fluid flow in stacks for example, CFD simulations are often used (1). On the nanometer scale, implementations of continuum models are suitable options (2).…”