Giant 'sand battery' holds a week's heat for a whole town
Giant 'sand battery' holds a week's heat for a whole town
A new industrial-scale 'sand battery' has been announced for Finland, which packs 1 MW of power and a capacity of up to 100 MWh of thermal energy for use during those cold polar winters. The new battery will be about 10 times bigger than a pilot plant that’s been running since 2022.
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They didn't say, but I'm wondering what the loss is when you convert the heat back into electricity. I assume they're boiling water and turning turbines with it- I can't imagine they're losing too much.
They're using heat exchangers to add it to the municipal heating loop. No electricity involved on that side.
I saw that, but they said it could be converted to heat with a loss.