Modeling of energy conversion processes at the microscale

• Forschungsstelle: BFE
• Projektnummer: 103078

Schlüsselwörter (Deutsch)

TP0076;F-Brennstoffzellen

Kurzbeschreibung (Deutsch)

Modeling of energy conversion processes at the microscale

Schlussbericht (Englisch)

Main goal of the project was the development of an advanced numerical tool capable of modeling key microscale processes occurring in both thermochemical and electrochemical conversion systems. A particular objective was to apply the new model in a PEFC and compare the predictions with measurements of permeabilities and diffusivities inside the gas diffusion layer (GDL). The method of approach involved: a) developing a new mesoscale Lattice Boltzmann model for: multi-species, non-isothermal, reacting, complex three-dimensional geometry flows, and b) carrying out permeability and diffusivity experiments in a model PEFC. The main results are summarized below:  - Thermal-multicomponent LB model derivation 2D and 3D, and validations in a large number of benchmark flows. - Simulation of 3D porous media flows with application to PEFCs. - Validation of complex geometry algorithm in 2D and 3D against experiments as well as against other CFD numerical tools.  - Study and characterization of the GDL properties, using in-situ X-ray tomography under normal operational conditions (saturation dependent permeability and diffusivity).  - Simulation of bulk chemical reactions.

Auftragnehmer/Contractant/Contraente/Contractor:
Paul Scherrer Institut

Autorschaft/Auteurs/Autori/Authors:
Prasianakis,N. I.
Büchi,Felix N.
Mantzaras,Ioannis

Zugehörige Dokumente

• Modeling of energy conversion processes at the microscale with application to PEFCs - Final Report [PDF] 2'540 kB