Expansion of Lille Torup gas storage facility
Gas Storage Denmark, the owner and operator of Lille Torup gas storage facility, is working on plans to convert two of the caverns into hydrogen storage and one cavern for compressed air storage.
At Lille Torup gas storage facility, natural gas is stored in caverns – underground cavities. Lille Torup is located in northern Jutland, Denmark.
The gas storage facility has seven caverns at its disposal. Gas Storage Denmark, which owns and operates Lille Torup gas storage facility, is working on plans to convert two of the caverns into hydrogen storage and one cavern for compressed air storage.
Hydrogen is expected to play an important role in the green energy system of the future. It will take a lot of solar cells and wind turbines to meet Denmark's total electricity consumption using green power. Eventurally, this will mean that sometimes we will have more renewable energy than we can immediately use.
Green electricity can be converted to hydrogen
Using electrolysis, green electricity can be converted into hydrogen, which can be used directly or converted back into electricity. This ensures that we also have green electricity when the sun is not shining or the wind is not blowing. This may also help to prevent wind turbines from being forced to stand idle on windy days. All in all, hydrogen can help to ensure security of supply and stability in the Danish electricity system.
Lille Torup can become a hub for the future green electricity and hydrogen system as the unique subsoil can be used to store hydrogen.
In connection with the conversion of the caverns, the surface system in Lille Torup will be expanded. A facility for the treatment of hydrogen will be built. The plant will resemble the existing facility at the gas storage facility. It will be located in the immediate vicinity of the existing surface system. Gas Storage Denmark has not yet decided exactly where the plant will be located.
One of the caverns for hydrogen will be offered to customers buying into the hydrogen storage facility on ordinary market terms. The other cavern for hydrogen has already been earmarked for Green Hydrogen Hub (GHH).
In GHH, Gas Storage Denmark collaborates with two private companies, Corre Energy and Eurowind Energy, on a large storage facility to produce green electricity.
The compressed air will be stored in the third cavern. Corre Energy will need compressed air to convert hydrogen into green electricity. Corre Energy is planning to build a compressed air system close to Lille Torup gas storage facility. This is also called CAES, where CAES stands for Compressed Air Energy Storage.
|PRELIMINARY, OVERALL TIME SCHEDULE|
|2023||Preparatory phase/design phase|
|2024 and 2025||
Gas Storage Denmark applies for necessary permits and approvals
|End of 2028/beginning of 2029||
Gas Storage Denmark
Green Hydrogen Hub
You can read more about the cooperation between Gas Storage Denmark, Corre Energy and Eurowind Energy here: Green Hydrogen Hub
Infrastructure for hydrogen
Energinet, operator of the Danish gas transmission system, will, together with Evida, play a key role in the hydrogen system of the future. The two companies will establish, own and operate the hydrogen infrastructure in Denmark.
A political agreement made in May 2023 gives Energinet responsibility for connecting hydrogen infrastructure across borders and establishing the connection to hydrogen storage facilities. Evida will be responsible for connecting domestic hydrogen producers and consumers.
Handling brine from the caverns
As part of the conversion project, Gas Storage Denmark cooperates with Danish authorities on finding a lasting solution to brine management.
Brine is saturated saltwater originating from the leaching of the caverns in the subterranean salt domes. Gas Storage Denmark was previously permitted – on special terms – to discharge brine from the caverns in connection with necessary maintenance and replacement of pipes and valves. However, the permit was revoked by the Danish Environmental Board of Appeal in 2016, and since then the storage facility has been challenged by a brine-filled cavern.