Power-2-Electrolysis

Redemption of the Danish ambition to reach 100% renewable energy by 2050 makes a focus on energy conversion and storage imperative. In such scenario electrolysis can become a keystone in the energy system. In this project GreenHydrogen (GH) and Haldor Topsoe (HTAS) establish a unique collaboration with LeanEco as well as Aalborg University, Department of Energy Technology and Aarhus Universities to develop highly efficient power supplies for electrolysis systems. Herby skills within electrolysis, power electronics, heat recovery and business will be united in a unique combination.

Together the parties will address the targets for electrolysis; to reduce the overall cost and increase the efficiency of the technology as established in the Danish Partnership for Hydrogen and Fuel Cells Strategy and Roadmaps. Simultaneously, the aim is to prepare electrolysis systems to become a part of a future balanced intelligent power system, therefore the power supplies must be developed to provide ancillary services to the grid. Economically sustainability of the technology is also absolute essential. The project will therefore include development and optimization of business models for the operation of large electrolysis systems with a focus on intelligent purchase of electricity and the sale of ancillary services to the grid. The power supply converts AC power to DC power, which is used in the electrolysis process. Standard power supplies have an efficiency of approx. 90%. This level is unacceptably low for use in energy conversion systems. A successful implementation of this project will increase the system efficiency to a level of 99% due to raised power efficiency and recovery of waste heat from the converter, which will reused for heating the feed water to the electrolysis process. Three prototypes will be done in order to demonstrate the capabilities of the developed systems.