Innovative sand battery can heat entire town for a week
Summary
Its core purpose is to serve as a high-capacity reservoir for surplus wind and solar energy. The company said sand grain size isnt all that important, and they prefer to use materials that arent typically used in the construction industry.Polar Night Energy installed its first sand battery in Vatajankoskis district heating network in Kankaanp\xe4\xe4, Finland, which went into service in 2022. That battery affords 100 kW of heating power and 8 MWh of capacity.Last month, Polar Night Energy announced it had partnered with Finnish district heating company Loviisan L\xe4mp\xf6 to build an industrial-scale sand battery in Pornainen. The unit will measure approximately 13 meters (42.7 feet) high and 15 meters (49.2 feet) wide, and will take a little over a year to construct and test.Once operational, the bigger battery will be able to store up to 100 MWh of thermal energy and provide 1 MW of heating power. Polar Night Energy said its storage system can even be built underground, ideal for regions where real estate is highly valued.