this post was submitted on 18 Apr 2024
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World’s largest thermal energy storage to be built in Vantaa, Finland (www.vantaanenergia.fi)
submitted 6 months ago by [email protected] to c/[email protected]
27 comments fedilink hide all child comments
 

A seasonal thermal energy storage will be built in Vantaa, which is Finland’s fourth largest city neighboring the capital of Helsinki.

The total thermal capacity of the fully charged seasonal thermal energy storage is 90 gigawatt-hours. This capacity could heat a medium-sized Finnish city for as long as a year. Broken down into smaller energy units, this amount of energy is equivalent to, for example, 1.3 million electric car batteries.

The project cost is estimated to be around 200 million euros, and it has already been awarded a 19-million-euro investment grant from Finland’s Ministry of Economic Affairs and Employment. Construction of the storage facility’s entrance is expected to start in summer 2024. The seasonal thermal energy storage facility could be operational in 2028.

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[–] [email protected] 6 points 6 months ago (3 children)

The problem with heating water is, afaik, that its not that easy to convert it back into electricity.

[–] [email protected] 6 points 6 months ago

But based on this article it seems like they just store heat and reuse it as heat when needed.
It sounds plausible to simply convert excess electricity to heat and simply use it with heat is needed

[–] [email protected] 1 points 6 months ago* (last edited 6 months ago)

Unless you heat it to about 400°C like in every steam-electric thermal power station. To store such temperatures, it's better to melt metal or something.