Thermal energy storage facility
In 2020, the largest thermal energy storage (TES) facility in Finland was put into operation in Vaskiluoto, Vaasa. It will diversify the region’s thermal energy generation both now and in the future. The power plant will carry out charging, and heat will be discharged from the TES system to be used in the region’s district heating network. The caverns used for thermal energy storage will act as an optimisation tool within EPV’s energy generation portfolio. The total volume of the TES facility is 210,000 m3 and it will have a charging and discharging capacity of 100 MW.
The flexibility afforded by the TES facility is a key factor in EPV’s energy generation system and will continue to be, even after the life cycle of the current plants has come to an end. The technology constructed on the site will be easy to modernise and adapt for new purposes as required. For example, the potential future hydrogen project will be connected to it, and the cavern fluid can be heated using wind, solar or some other renewable energy source, while utilising electric boiler technology.