Publication

Dynamic modelling of alkaline self-pressurized electrolyzers: a phenomenological-based semiphysical approach

Journal Article (2020)

Journal

International Journal of Hydrogen Energy

Doc link

https://doi.org/10.1016/j.ijhydene.2020.06.038

File

Download the digital copy of the doc pdf document

Abstract

This paper proposes a phenomenological based semiphysical model (PBSM) for a self-pressurized alkaline electrolyzer. The model, based on mass and energy balances, represents the dynamic behavior of hydrogen and oxygen production using electrolysis. The model allows to anticipate operational variables as dynamic responses in the concentrations of the electrolytic cell, and variations in both, level and pressure, at the gas separation chambers due to the change in electric current. The model parameters have been adjusted based on experimental measurements taken from an available prototype and through a suitable identication process. Simulation results replicate the current dynamic response of the experimental self-pressurized electrolyzer assembly. This model proves to be useful in the improvement of the control of gas production rate in this kind of assemblies, both as a validated simulation platform and as a source of reduced order models for model-based control design.

Categories

power generation control.

Author keywords

Hydrogen, Alkaline electrolysis, Dynamic modelling

Scientific reference

M.R. David, H. Alvarez, C. Ocampo-Martínez and R. Sánchez-Peña. Dynamic modelling of alkaline self-pressurized electrolyzers: a phenomenological-based semiphysical approach. International Journal of Hydrogen Energy, 2020, to appear.