Phenomenological based Model of Hydrogen production using an Alkaline self-pressurized Electrolyzer

Abstract

The aim of this work is to develop the phenomenological based modeling of a self-pressurized alkaline electrolyser with the objective of predicting the cross-contamination of the gases produced. A proposed model, built in Matlab R , represents the dynamical evolution in real electrolysers, and anticipates operational variables: level, pressure and all concentrations. Dynamic responses in the concentrations of the electrolytic cell, and variations in both level and pressure at the chamber due to the change in current and diffusivity, are reported. The equations by which the variables can be computed are also presented. The proposed model is ready for the corresponding adjustment of parameters based on experimental measurements taken from an available prototype and through a suitable identification process.

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

“…Here, the processes occurring in the electrolyzer considering the entire system is described in terms of dynamic equations. This work continues the partial model reported in [19]. That preliminary model was developed only for the hydrogen side and with simplified assumptions for the interconnection of both sides.…”

“…Secondly, processes of pressurization and operation are compared between simulations and real data. Also, in a previous work [19],…”

Model-based control design for H2 purity regulation in high-pressure alkaline electrolyzers

“…A highly-detailed model for alkaline electrolyzers is given in [18,19]. This Such a model is suitable for simulation purposes but not for control design.…”

“…Recently, Sanchez et al [17] used a commercial software to model the entire system while the cell-stack is described by a semi-empirical approach. In the same direction, some of the authors of the current work have developed a Phenomenological Based Semi-empirical Model (PBSM) reported in [18,19]. This model has the advantage of describing the dynamic phenomena and the evolution of all the electrolyser subsystems.…”