Solution provider

resolvent brings innovation, digitalization and sustainability into your business.
Case
Energy storage
Green hydrogen
Hydrogen infrastructure
+2
resolvent brings innovation, digitalization and sustainability into your business.
Add the case to your visit request and let us know that you are interested in visiting Denmark
The green energy transition requires efficient storage solutions for surplus renewable energy. Alkaline electrolyzers (AEL) convert electricity into hydrogen, which can be stored and used later as fuel or to generate electricity. AEL systems are complex, with interactions between physical processes such as liquid flow, gas generation, and temperature changes. Gas bubbles formed during operation affect local resistance and current distribution, making it difficult to predict cell performance under varying conditions.
A simulation model was created using COMSOL Multiphysics® to account for the main physical processes in AEL systems. The following main modelling assumptions were made:
The model simulated liquid and gas flow, electrochemical reactions, and temperature-related effects. Time-dependent studies were used to address the changes in electrolyte flow and gas generation over time. Detailed outputs included velocity, pressure, gas volume fractions, reaction rates, and current distributions across the cell.
The simulation provided:
These results enabled calculations of flow distribution, gas bubbles behavior and residence time, and prediction of cell voltages. The findings form a foundation for optimizing cell geometry and operating conditions, reducing reliance on physical prototypes and speeding up development.
This simulation approach offers a practical method to improve AEL design and operation, supporting hydrogen production for renewable energy storage.