A thermal tank made of sand, capable of storing 100 MWh of heat for heating, was put into operation in the Finnish city of Pornainen. This is reported by TechCrunch.
Created by Polar Night Energy, 2,000 tons of crushed steatite, a byproduct of Tulikivi fireplaces, were loaded.
The sand battery is able to keep warm for up to a week in winter and up to a month in summer, and the loss rate is only 10-15%.
The sand battery is connected to the central heating system of the Pornainen village and provides heat to the school, library and city hall.
It generates up to 1 megawatt-hour of heat, which makes it possible to reduce the use of wood chips in the boiler room by 60% and completely eliminate outdated oil-fired boilers.
A sand battery is a type of thermal energy storage system that uses sand or crushed stone to store heat.
Electricity is used to heat the sand, usually from renewable sources. This accumulated heat can then be used for various purposes, including heating buildings. korrespondent.net.
