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hell naah
(lemmy.blahaj.zone)
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this post was submitted on 28 Jul 2025
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This would be great to exploit for some kind of reservoir-based heating and cooling system.
we do have those for district heating, but they're usually composed of water. the finns are experimenting with sand too. thing is, +/- 30 degrees isn't much to work with. all the heat battery systems i've seen that work are running in the hundreds of degrees. well, except the water ones of course, but even those run close to boiling point.