Comment on A Finnish town is heating itself with 2,000 tonnes of crushed rock: its giant “sand battery” can cover almost a month of heating demand and has cut district heating emissions by 70%
It’s easier to freeze water than to cool rock borehole
The problem with freezing water is the material expansion.
that’s no problem at all, systems like that are in use
HobbitFoot@thelemmy.club 6 hours ago
The problem with freezing water is the material expansion.
fullsquare@awful.systems 6 hours ago
that’s no problem at all, systems like that are in use