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This is a part of my son's fascinating mini model of a Stirling engine that actually works when you put it on top of a cup of hot water for instance. A cup filled with ice also works.

 

A Stirling engine ( invented and patented in 1816 by Robert Stirling ) is a heat engine that operates by cyclic compression and expansion of air or other gas at different temperatures, such that there is a conversion of heat energy to mechanical work.

Stirling engines have a high efficiency compared to internal combustion engines. They are also capable of quiet operation and can use almost any heat source. The heat energy source is generated external to the Stirling engine rather than by internal combustion. Because the Stirling engine is compatible with alternative and renewable energy sources it could become increasingly significant as the price of conventional fuels rises, and also in light of concerns such as depletion of oil supplies and climate change.

 

www.youtube.com/watch?v=vGlDsFAOWXc

 

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Uploaded on June 30, 2019
Taken on June 30, 2019