On Sunday, 5 July 2020 12:07:15 UTC+1, Dave Plowman (News) wrote:
In article ,
tabbypurr wrote:

And, of course, the heat stored during expansion will be released when
it cools down.

Obvious to everyone but Dave. Pressing a spring by expansion then
releasing it by unexpanding doesn't really do any work, it just
temporarily stores some energy.

So you can press a spring in your little world with no energy involved?

FWIW springs return the energy when released. But a hot radiator is not a compressed spring.


And if it released an equal amount of energy on release, you'd have the
perfect energy storage solution.

perfect? you dream

Do you ever think before posting?


NT