poVoq@slrpnk.netM to Green Energy@slrpnk.netEnglish · 1 个月前Finland warms up the world’s largest sand battery, and the economics look appealingtechcrunch.comexternal-linkmessage-square19fedilinkarrow-up1177cross-posted to: tech@lemmit.onlinefuturology@futurology.todayhackernews@lemmy.bestiver.se
arrow-up1177external-linkFinland warms up the world’s largest sand battery, and the economics look appealingtechcrunch.compoVoq@slrpnk.netM to Green Energy@slrpnk.netEnglish · 1 个月前message-square19fedilinkcross-posted to: tech@lemmit.onlinefuturology@futurology.todayhackernews@lemmy.bestiver.se
minus-squareHirom@beehaw.orglinkfedilinkarrow-up3·1 个月前 Pornainen’s battery is charged using electricity from the grid How so, do they use heater resistors or a heat pump? Electricity may be cheap sometimes but still, heater resistors aren’t the most efficient.
minus-squareperestroika@slrpnk.netlinkfedilinkarrow-up2·1 个月前They use resistive heating, so they can only charge it dirt cheap when there is surplus solar or wind.
minus-squareHirom@beehaw.orglinkfedilinkarrow-up1·1 个月前Okay, I guess the heat pumps aren’t suitable due to the economics or maybe cannot reach high enough temperatures.
minus-squareperestroika@slrpnk.netlinkfedilinkarrow-up1·1 个月前As much as I’ve understood, yes - heat pumps have difficulty with reaching high temperatures.
How so, do they use heater resistors or a heat pump?
Electricity may be cheap sometimes but still, heater resistors aren’t the most efficient.
They use resistive heating, so they can only charge it dirt cheap when there is surplus solar or wind.
Okay, I guess the heat pumps aren’t suitable due to the economics or maybe cannot reach high enough temperatures.
As much as I’ve understood, yes - heat pumps have difficulty with reaching high temperatures.