Comment on Grid-Scale Bubble Batteries Will Soon Be Everywhere

• oxbech@feddit.dk ⁨3⁩ ⁨weeks⁩ ago

  On their website (energydome.com) they claim “75%+” round trip efficiency, so not a bad guess!

  source

  • sunbeam60@feddit.uk ⁨3⁩ ⁨weeks⁩ ago

    That’s a hell of a lot better than most other systems. If true, and if scalable, this is a huge innovation.

    source

    • fullsquare@awful.systems ⁨3⁩ ⁨weeks⁩ ago

      compressors, turbines (like steam turbines), piping, 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

      source
  • fullsquare@awful.systems ⁨3⁩ ⁨weeks⁩ ago

    Compressed air without heat recovery is more like 30%, so this is huge

    source
  • brucethemoose@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    I was just about to bang out that they must lose a lot of heat from the compression. But apparently not! That’s amazing.

    source
• HaraldvonBlauzahn@feddit.org ⁨3⁩ ⁨weeks⁩ ago

  even the waste heat from the compression could be used to achieve more compression

  No. Waste heat can by definition not be converted to mechanical work.

  Otherwise, one could build a perpetuum mobile: Convert heat to mechanical work, use that work to generate heat, convert it to work again, and so on. You’d have a machine that generates energy out of nothing, and that’s not possible because of the law of energy conservation.

  source

  • nooneescapesthelaw@mander.xyz ⁨3⁩ ⁨weeks⁩ ago

    en.wikipedia.org/wiki/Recuperator

    A recuperator is a counter-flow energy recovery heat exchanger that recovers waste heat in the supply

    source