Nobian and Airengy to test AirBattery compressed-air storage in a Danish salt cavern

Scope of the collaboration

Nobian and energy technology company Airengy have started a collaboration to explore and assess the potential and feasibility of long-duration compressed air energy storage in a Nobian-operated salt cavern in Denmark.

Technology and site

The partners will evaluate Airengy’s compressed air energy storage technology, the AirBattery, which stores surplus renewable electricity as compressed air in an underground cavern to be released for power generation when needed. The feasibility testing is intended to take place in one of Nobian Dansk Salt’s caverns.

Why salt caverns

Salt caverns are cited as a proven and efficient solution for large-scale energy storage, including gases, due to their natural sealing properties and ability to safely store energy carriers under high pressure.

Strategic rationale and comments

Nobian frames the work as part of its strategy to develop large-scale energy storage solutions, leveraging its salt production position to support hydrogen and other energy solutions that balance supply and demand and strengthen energy security. Nobian Dansk Salt intends to act as a balancing partner in Denmark’s energy system to support grid stability and renewable integration at scale.

Louwrens op de Beek, Director Energy Storage at Nobian, said the collaboration aims to combine salt cavern expertise with Airengy’s technology to unlock long-duration storage and help reduce grid congestion. Maj. Gen. (res.) Yiftah Ron-Tal, Chairman of Airengy, said the agreement advances the company’s deployment into European target markets and connects its technology with existing geological infrastructure and industry know-how.