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Looking at the Stirling Engine may be a good place to start. See the link below.
Yes. The essence of the Stirling engine is to convert heat into motion.
A Stirling engine generator is less powerful than a combustion engine, but more ecologically sustainable. It operates on heat exchange. There are many types of Stirling engines.
It was invented in 1816 by Rev. Robert Stirling of Scotland
Scotland
It was invented in 1816 by Robert Stirling. You can find much more information about stirling engines and carnot cycles on Wikipedia.
Allan J. Organ has written: 'The Regenerator and the Stirling Engine' 'Stirling engine thermodynamic design'
It has heat exchange.
A Stirling engine generator falls into the category of external combustion engine. This type of engine converts heat energy to mechanical work by compressing and expanding air or other gas.
A steam engine, a stirling engine, a combustion engine, a jet engine, a rocket engine.
Stirling engine generators are environmentally friendly. The cooling fluid they use in them is helium and not freon. They are much more efficient in how they operate as well.