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A comment on Gigantic heat caverns in Mustikkamaa have now been filled with water (2021). Parent comment

Re:Gigantic heat caverns in Mustikkamaa have now been filled... by mschuster91 on Friday November 10, 2023 @12:20PM (#38221553)
> It would be more efficient without the heat exchanger

Not really, heat pumps as a transfer method can achieve better total efficiency and make distribution of the heat easier.

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Re:Gigantic heat caverns in Mustikkamaa have now been filled... by lazide on Friday November 10, 2023 @03:22PM (#38224010)
That is an interesting thought, but seems like the capex and ongoing electrical costs of the heat pump would be too high?

They’re looking to make cheap use of the existing waste heat, after all, which while ‘low quality’ is high enough quality for district heating already.

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