294
Grid-Scale Bubble Batteries Will Soon Be Everywhere
(spectrum.ieee.org)
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this post was submitted on 22 Dec 2025
294 points (98.4% liked)
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Sure wish they mentioned the effeciency.
Could be very high, even the waste heat from the compression could be used to achieve more compression and turbines get to above 90%, that all depends on the scales they're building this at. 70% overall doesn't seem unrealistic as an educated guess.
On their website (energydome.com) they claim “75%+” round trip efficiency, so not a bad guess!
That’s a hell of a lot better than most other systems. If true, and if scalable, this is a huge innovation.
compressors, turbines (like steam turbines), piping, some of which heat-resistant (500C), container for liquid carbon dioxide, lots of plastic for the bubble, something for thermal storage, dry and clean carbon dioxide, these aren't unusual or restricted resources, don't depend on critical raw materials or anything like that