Energy Storage – Hydrogen injected into the Gas Grid via electrolysis field test

Achievement of the Danish goal of 100 % renewable energy by 2050 makes it absolutely necessary to focus on conversion between different energy sources and on the opportunity for storing large amounts of energy. Here, the natural gas grid and electrolysis play a crucial role. Power from wind and solar can be converted by electrolysis into hydrogen which can be stored in the gas grid (Power-to-Gas).

This project brings together key players in the Danish natural gas infrastructure, Energinet.dk, Dong Gas Distribution and Danish Gas Technology Centre, in a unique collaboration with IRD A/S to examine the consequences of injecting hydrogen directly into the natural gas grid via M/R stations. The project is a direct consequence of Energinet.dk´s strategy to integrate RE-gas with the existing gas system and of the Danish R&D strategies and Road Maps on development of electrolysers.

In the project, a closed loop between two M/R stations is established. An electrolysis plant for onsite production of hydrogen is installed adjacent to the M/R stations and hydrogen is injected directly into the closed loop. The M/R stations´ ability to handle large amounts of hydrogen will examined and necessary modifications will be conducted. The electrolysis system will be developed as a stand-alone production unit with associated user interface, monitoring and smart-grid-ready control systems.

A lengthy test period of 24 months allows for a comprehensive test program in which the infraction between electrolysis plant and M/R stations is investigated. The test phase also includes lifetime testing of critical components in both electrolyser and M/R stations.

The project results in a practical, public guideline that describes how the M/R stations and gas grid must be adapted to handle the injection of hydrogen in the natural gas grid, including consequences for regulatory approvals and operation & maintenance.

The financial support provided in this project will accelerate progress towards being able to store renewable electricity as hydrogen directly into the natural gas grid and brings IRD A/S closer to having an electrolysis plant ready for commercial launch.