poVoq@slrpnk.netM to Green Energy@slrpnk.netEnglish · 9 days agoFinland warms up the world’s largest sand battery, and the economics look appealingtechcrunch.comexternal-linkmessage-square20linkfedilinkarrow-up1175arrow-down10
arrow-up1175arrow-down1external-linkFinland warms up the world’s largest sand battery, and the economics look appealingtechcrunch.compoVoq@slrpnk.netM to Green Energy@slrpnk.netEnglish · 9 days agomessage-square20linkfedilink
minus-squareHirom@beehaw.orglinkfedilinkarrow-up3·9 days ago 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-up2·8 days agoThey use resistive heating, so they can only charge it dirt cheap when there is surplus solar or wind.
minus-squareHirom@beehaw.orglinkfedilinkarrow-up1·8 days agoOkay, I guess the heat pumps aren’t suitable due to the economics or maybe cannot reach high enough temperatures.
minus-squareperestroika@slrpnk.netlinkfedilinkarrow-up1·7 days agoAs 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.