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.
Abstract.Ultracapacitors are entering into applications dominated by batteries. The complementary features of ultracapacitors and batteries may allow in certain applications to combine them enhancing the performance of the overall energy storage system. In other applications, the advantages of ultracapacitors may allow to completely displaced batteries avoiding some of its drawbacks. Determined key issues and weaknesses of ultracapacitors are being intensively researched, leading to a greater applicability of ultracapacitors.
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