this post was submitted on 22 Dec 2025
228 points (98.3% liked)

Technology

77870 readers
4269 users here now

This is a most excellent place for technology news and articles.

Our Rules

  1. Follow the lemmy.world rules.
  2. Only tech related news or articles.
  3. Be excellent to each other!
  4. Mod approved content bots can post up to 10 articles per day.
  5. Threads asking for personal tech support may be deleted.
  6. Politics threads may be removed.
  7. No memes allowed as posts, OK to post as comments.
  8. Only approved bots from the list below, this includes using AI responses and summaries. To ask if your bot can be added please contact a mod.
  9. Check for duplicates before posting, duplicates may be removed
  10. Accounts 7 days and younger will have their posts automatically removed.

Approved Bots

founded 2 years ago
MODERATORS
L3s@lemmy.world
enu@lemmy.world
technopagan@lemmy.world
L4s@lemmy.world
L3s@hackingne.ws
L4s@hackingne.ws
228
Grid-Scale Bubble Batteries Will Soon Be Everywhere (spectrum.ieee.org)
submitted 15 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."

you are viewing a single comment's thread
view the rest of the comments
[–] HaraldvonBlauzahn@feddit.org 1 points 2 hours ago (1 children)

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.

[–] nooneescapesthelaw@mander.xyz 2 points 51 minutes ago

https://en.wikipedia.org/wiki/Recuperator

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