Joonas Koponen

Optimization strategies of PEM electrolyser as part of solar PV system

Solar and wind power have intermittent nature. In order to guarantee continuous power supply, they need to be accompanied with energy storage systems or bridges between different energy sectors. Hydrogen is a potential candidate for both applications (an energy storage system and bridging technology). Hence, it is interesting to study the practical dynamic properties and limitations of electrolysers in the viewpoint of renewable energy production. This paper studies optimization strategies of a proton exchange membrane (PEM) electrolyser together with a solar photovoltaic (PV) system.

Specific energy consumption of PEM water electrolysers in atmospheric and pressurised conditions

Power electronics enable the interconnection between renewable energy and electrolytic hydrogen production. At ambient conditions, the volumetric energy density of hydrogen is low, and therefore pressurisation is required. This paper studies the effect of the hydrogen outlet pressure from PEM electrolysers on the specific energy consumption of water electrolyser systems.

Hardware-in-loop emulator for water electrolysers

Modular hardware-in-loop emulator for water electrolysers is developed to study the different electrolyser power supply electronics as well as the electrolyser, for example, as an adjustable load together with renewable electricity production or frequency control. An emulator up to 405 A of continuous current is built using commercially available power electronic converters. The design and the operating principle of the emulator are discussed. The experimental tests of emulator modules are reported.

On- and off-grid laboratory test setup for hydrogen production with solar energy in nordic conditions

Renewable energy production, such as solar and wind power, require energy storage systems because of their intermittent nature. Hydrogen is potential candidate to store energy, because it has high-energy content capacity also in long term and it is possible to build affordable large-scale energy storages based on hydrogen. This paper studies solar power and water electrolyser co-operation and system designing.