this post was submitted on 22 Dec 2025
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Grid-Scale Bubble Batteries Will Soon Be Everywhere (spectrum.ieee.org)
submitted 18 hours ago by kalkulat@lemmy.world to c/technology@lemmy.world
52 comments fedilink hide all child comments
 

"This giant bubble on the island of Sardinia holds 2,000 tonnes of carbon dioxide. But the gas wasn’t captured from factory emissions, nor was it pulled from the air. It came from a gas supplier.... "The facility compresses and expands CO2 daily in its closed system, turning a turbine that generates 200 megawatt-hours of electricity, or 20 MW over 10 hours."

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[–] acosmichippo@lemmy.world 1 points 5 hours ago* (last edited 5 hours ago)

This is not even close to being a general solution. Lots of places do not have water loop radiators and it is not an easy retrofit at all. Lots of people cannot even afford additional insulation for their domicile. Telling the average person "don't be a wuss" is not a viable strategy to get them on board with supporting green energy.

Also heat pumps are the most efficient form of heating we have. They work best at a constant low/mid level, not completely shutting off for half a day and having to work extra hard to catch up in the morning.