Found this on another “social” network - and thought I’d share with you, as I think the principle is pretty intriguing.
The article itself reads a bit sloppy - but explains what’s going on quite well imo.
On the sun-drenched Mediterranean island of Sardinia, in the industrial zone of Ottana, rises a colossal, gleaming white elliptical bladder structure that looks like an indoor sports stadium or a terrestrial space habitat. Instead of
tldr :
like steam engine but replace water with CO2
(and more efficient if no gas is lost)
liquid at (20 to 30)⁰C, ~65 atm
gas at (-40 to +40)⁰C at least and 1 atm
(it needs a huge place for storage of course)