Naked Science Forum

Non Life Sciences => Chemistry => Topic started by: thedoc on 14/06/2016 07:50:02

Title: Can a sterling engine recover a combustion engine's wasted heat?
Post by: thedoc on 14/06/2016 07:50:02
Bruce Rodgers asked the Naked Scientists:
   Can a sterling engine recover a combustion engine's wasted heat?
What do you think?
Title: Re: Can a sterling engine recover a combustion engine's wasted heat?
Post by: evan_au on 14/06/2016 10:56:26
A Stirling engine can recover some of the waste heat, if it has a cold sink available to it.

But not all the waste energy - that would produce a perpetual motion machine.

There is a limit to the amount of energy that can be extracted by a heat engine. The theory was developed back in the days of steam engines, but it applies to jet engines and nuclear reactors too.
https://en.wikipedia.org/wiki/Carnot%27s_theorem_(thermodynamics)

Talk about evading obsolescence!