Stacks and hydraulics issues-Influence of the operating parameters: towards optima in cell operation
Jonathan Deseure
Out line
Water electrolysis
Energy application of water electrolysis
Thermodynamic of water electrolysis& energetic looses
Thermodynamic and temperature effect on water splitting
Overpotentials &Irreversibilities
Cell design and operating conditions
Modelling of Electrochemical Generators
Energetic (Enthalpic) balance for a CSTR under Galvanostatic operating mode. Current distribution (I, II, III)
Jonathan Deseure
Out line
Basic overview of electrochemical cell efficiency
Overpotentials & energetic looses
Stirred tank approach :Mass, charge and energy balance
Example of water management in PEMFC
Example of 500W PEMFC Stack
Practice : Redox Flow Battery
Electrochemical Impedance Spectroscopy:
(Applied mathematics and computation point of view)
How to solve (fast and accurately) a multiphysic problem in oscillating state
Jonathan Deseure
Computing simulation appears to be one of the most efficient approaches to analyze the coupled mechanisms that occur in electrochemical system. Modeling opens the possibility of testing the influence of parameters such as: intrinsic conductivities, particle size, graded or homogeneously distributed porosity or composition. The Electrochemical Impedance Spectroscopy (EIS) represents a powerful tool in electrochemistry. Simulation of EIS helps to understand the experimental EIS recording. In this context mathematical tools are finely managed. The “mathematical” model can be solved using commercial code for multiphysics problems or using in-house-code. Boundary conditions should be well defined before solving the set of partial differential equations and a relevant mapped mesh can be used to obtain a reasonable computation time. So, several examples of EIS computations will be exposed.
Out line
Preamble: discrete EIS ?
Multiphysic approach using finite difference method.
EIS modelling
Numerical approach of EIS artefacts