Chris Remington@beehaw.orgM to Technology@beehaw.org · 2 months agoA 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%www.cnbc.comexternal-linkmessage-square10linkfedilinkarrow-up1103arrow-down11
arrow-up1102arrow-down1external-linkA 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%www.cnbc.comChris Remington@beehaw.orgM to Technology@beehaw.org · 2 months agomessage-square10linkfedilink
minus-squarefullsquare@awful.systemslinkfedilinkarrow-up6·2 months agoIt’s easier to freeze water than to cool rock borehole
minus-squareHobbitFoot @thelemmy.clublinkfedilinkEnglisharrow-up4·2 months agoThe problem with freezing water is the material expansion.
minus-squarefullsquare@awful.systemslinkfedilinkarrow-up4·2 months agothat’s no problem at all, systems like that are in use
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