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Finland warms up the world’s largest sand battery, and the economics look appealing
Pornainen recently turned on a 100 MWh thermal battery filled with ground up soapstone.
The economics are compelling, and it’s hard to get any cheaper than the crushed soapstone now housed inside an insulated silo in the small town of Pornainen. The town’s district heating system also relies on burning wood chips, and the sand battery will reduce that consumption by about 60%, according to Polar Night. Electrified Thermal Solutions, TechCrunch’s Startup Battlefield 2023 runner-up, has created a type of brick that can produce heat approaching 2,000 degrees Celsius.
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