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Poster: An analytical approach to modelling of mass transfer effects in Redox Flow Batteries

Poster: An analytical approach to modelling of mass transfer effects in Redox Flow Batteries

Presenter: René Lorenz
Title: An analytical approach to modelling of mass transfer effects in Redox Flow Batteries
Affiliation: DTU Energy, Technical University of Denmark

Abstract

Aiming at a simple and computationally inexpensive method for analyzing a single cell setup in terms of (pumping power corrected) net power, a combination of analytical models are evaluated. Regarding the fluid flow, simplification assumptions allow for relating the pressure drop to the applied flowrate with a single explicit equation, which is implemented for three configurations: Flow Through electrode, Serpentine Flow Field and Interdigitated Flow Field. Multiplying Δp with flow rate Q gives the minimum parasitic pumping loss. A first estimation of the power output is obtained by applying a Thin Film Electrode model, coupled with fluid flow by assuming a flow factor that relates stoichiometric flow rate to applied flow rate. In a second step, a differential expression of the overpotential across the electrode thickness, solved numerically, accounts for the 3D porous reaction volume. The results are compared to numerical and experimental studies.

Full list of posters


Poster: Developing Li-ion conducting passivation layers on metallic lithium and their effect on electrochemistry
Poster: Optimisation of printed film densification for sodium nickel chloride (Na-Ni-CI) batteries
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