Three caves 300 meters long will be excavated
It will be built in Vantaa near Helsinki 90 GWh A total of three caves, approximately 20 meters wide, 300 meters long and 40 meters high, will be excavated for the capacity facility. The floor of the caves will be 100 meters below ground level.
With the Varanto Seasonal Thermal Energy Storage system, heat will be stored in underground caves and heated when needed by distributing it to the buildings through the regional heating system.
Underground caverns with a total volume of 1.1 million cubic meters, including process facilities It will be filled with hot water. This volume is then pressurized to prevent the water from boiling. 140 degrees temperature will be provided.
The facility, which was first designed in 2021, The foundation will be laid this summer and completed in 2028. is targeted. At a cost of 200 million euros The project has received a 19 million investment grant from the Finnish Ministry of Economic Affairs and Labor.
Vantaa Energy CEO Jukka Toivonen said about the project, “The world is going through a major energy transformation. Wind and solar energy have become vital technologies in the transition from fossil fuels to clean energy. The biggest challenge in the energy transition so far has been the inability to store these intermittent forms of energy for later use. Small-scale storage solutions such as batteries and accumulators are unfortunately not sufficient; Large, industrial-scale storage solutions are needed. Varanto is a perfect example of this and we are happy to set an example for the rest of the world.” made his statements.
Heat and electricity can be provided with a hybrid system
Vantaa Energy together with Varanto for the project Two electric boilers of 60 MW will build. These boilers can be renewed in periods when electricity is abundant and cheap. It will be used to generate heat from electricity. Again, with the smart control system developed by Varanto, electricity generation, waste heat and district heating systems are combined and a hybrid system will be created. At that moment, it will be decided which source is advantageous and efficient and a switch will be made between heat and electricity production.
District heating is by far the most popular form of heating for buildings and homes in Finland. The city of Vantaa has more than 600 km of underground district heating network, and approximately 90% live in houses heated by a district heating system.
Compared to population, Finland is the largest district heating producer in the Scandinavian countries. A total of 37.3 TWh of district heat was produced in Finland in 2023. 53% of this was obtained from renewable heat sources and 14% from waste heat.
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Source link: https://www.donanimhaber.com/finlandiya-dunyanin-en-buyuk-isi-depolama-tesisini-insa-edecek–176195