Sterling Engines
Video of all sorts of warm-air-powered engines (Sterling variants):
http://www.futilitycloset.com/2014/11/02/warm-work-2/
Things of beauty.
On a practical note, there are a few places that use a Sterling engine to make use of waste heat from manufacturing to do things like heat the building.
http://www.futilitycloset.com/2014/11/02/warm-work-2/
Things of beauty.
On a practical note, there are a few places that use a Sterling engine to make use of waste heat from manufacturing to do things like heat the building.