Sulzer & Hyme Energy developing Denmark molten salt storage pilot project

October 24, 2023

A molten salts storage (MOSS) plant pilot is being built in Esbjerg, Denmark using Hyme Energy’s energy storage technology and Sulzer’s molten salt pump.

The MOSS plant will incorporate an energy storage system using the molten hydroxide salt commonly referred to as drain cleaner. This salt is comparatively less expensive and more accessible than molten salts used for energy storage to date. The pilot plant is expected to go operational in 2024.

“The thermal properties of molten hydroxide salt, which allow it to be heated to extremely high temperatures and stored for up to two weeks, make it an excellent medium for renewable energy storage,” a statement from Switzerland-based Sulzer said. 

If successful, the pilot would ultimately be scaled to enable a storage capacity of 1GWh, which would mean the system could store the equivalent daily electricity consumption of 73,000 Swiss homes. At this capacity, the plant is projected to deliver annual CO2 savings of 32,000 tonnes per GWh of capacity. . 

MOSS consortium members include Aalborg University, Alfa Laval Aalborg, DIN Forsyning, Energy Cluster Denmark, Hyme Energy, KIRT X THOMSEN, Seaborg and Sulzer. In addition to member contributions, the consortium project is funded in part by the Danish Energy Technology Development and Demonstration Program (EUDP).

Sulzer’s executive chairwoman Dr. Suzanne Thoma said: “MOSS has the potential to unlock stable renewable energy for future generations. Together with our partners, we are working to enable economies around the world to become more efficient and sustainable.”

CEO and co-founder of Hyme Energy, Ask Emil Løvschall-Jensen, said: “The energy storage facility in Esbjerg is a milestone for Hyme and a culmination of years of work to mature the technology. I’m proud that we can work with established industry players to demonstrate our technology. There is a lot of interest in our energy storage solution in the industrial and utility sectors, and it’s critical that we get to market quickly. The world and the climate cannot wait.”