Dynamic modeling and simulation of a pressurized alkaline water electrolyzer: a multiphysics approach

Abstract

In this paper a dynamic model for the simulation of pressurized alkaline water electrolyzers is presented. The model has been developed following a multiphysics approach, integrating electrochemical, thermodynamic, heat transfer and gas evolution processes in order to faithfully reproduce the complete dynamical behavior of these systems. The model has been implemented on MATLAB/Simulink and validated through experimental data from a 1 Nm 3 h -1 commercial alkaline water electrolyzer, and the simulated results have been found to be consistent with the real measured values. This model has a great potential to predict the behavior of alkaline water electrolyzers coupled with renewable energy sources, making it a very useful tool for designing efficient green hydrogen production systems.

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“…These characterizations have permitted the representation of the polarization curve using 16 empirical coefficients and the determination of parameters such as resistances (linked to charge transfer and electrolyte) as well as capacitances (linked to the double layer phenomenon), both at the anode and cathode. A. Iribarren et al [39], following a multi-physics approach, developed a dynamic alkaline electrolyzer model in Matlab/Simulink, and validated it with empirical data from [38]. This model incorporated a gas production model, a temperature model, and an electrochemical model.…”