News for hackers. Stuff that matters.

A comment on CO2 battery could make wind and solar dispatchable at a lower price. Parent comment

Re:CO2 battery could make wind and solar dispatchable at a l... by pjc50 on Sunday August 01, 2021 @01:21PM (#28028060)
Carnot cycle, isn't it? Not great for efficiency, probably less than 50% round trip.
[ Parent | on HN ]
Re:CO2 battery could make wind and solar dispatchable at a l... by ghkbrew on Sunday August 01, 2021 @04:37PM (#28029691)
Carnot is for heat engines. So the maximum efficiency of converting a heat differential into kinetic energy.

This is converting electricity into kinetic energy and vice versa. So it'd be the product of those two maximum efficiencies, whatever they are.

[ Parent | on HN ]
Re:CO2 battery could make wind and solar dispatchable at a l... by ben_w on Monday August 02, 2021 @03:57AM (#28034018)
> This is converting electricity into kinetic energy and vice versa.

Where do you get that from? The article definitely seems to me to be describing a heat engine.

[ Parent | on HN ]