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Finland warms up the world’s largest sand battery, and the economics look appealing. (techcrunch.com)

submitted 1 day ago by [email protected] to c/[email protected]

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[–] [email protected] 2 points 20 hours ago (3 children)

Why not just use a water reservoir which will also fill with water when it rains.

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[–] [email protected] 2 points 19 hours ago

Dams have major ecological impacts. Water towers could work but as I understand it storing heat in sand or salt is more energy dense/efficient vs elevated water and gravity. All of what I just said is based solely on things I've read some time ago but cannot cite, and documentaries about dams

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