love both #energyStorage and #sand :,D

"#PolarNightEnergy has built an industrial-scale sand battery in Pornainen #Finland. The #battery is set to reduce #carbonemissions from the local #heating network by as much as 70%. At 42 feet tall and 50 feet wide, the battery can store up to 100 MWh, enough to heat the whole town for a week. The #sandbattery can hold a charge for months at a time, helping balance the energy #grid during periods of high demand."

https://newatlas.com/energy/largest-sand-battery-finland-pornainen

#renewables

The world's largest sand battery just went live in Finland

Finland has inaugurated an industrial-scale sand battery this week in the southern town of Pornainen, where it'll take over heating duties from an old woodchip power plant for the municipality. It's set to reduce carbon emissions from the local heating network by as much as 70%, and is the largest…

New Atlas
@Irisherself At first blush, this seems like a really good idea for another reason: the effects of catastrophic failure of the system seem like they'd be much less dire than, say, a refinery explosion.