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Grid-Scale Bubble Batteries Will Soon Be Everywhere (spectrum.ieee.org)
submitted 2 months ago by kalkulat@lemmy.world to c/technology@lemmy.world
68 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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[-] eleitl@lemmy.zip 8 points 2 months ago

It's still near atmospheric pressure. Liquid CO2 expanding is powering the gas turbines.

[-] wewbull@feddit.uk 11 points 2 months ago

Ah the bubble is the expansion volume. Not the storage volume... got it. I had it backwards.

So yes, very similar then.

this post was submitted on 22 Dec 2025
294 points (98.4% liked)

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