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Stirling Engines

Stirling Heat Engines

The Stirling engine is a Heat Engine - it is vastly different from the internal-combustion engine in your car. A Stirling engine employs the Stirling cycle, which is completely different than the cycles used in common internal-combustion engines. The Stirling cycle uses an external heat source, which could be anything from burning gasoline to solar energy to the heat produced by decaying plants... or even a warm cup of coffee. No combustion takes place inside the cylinders of the engine. The gasses used inside a Stirling engine never leave the engine. There are no exhaust valves that vent high-pressure gasses, as in a gasoline or diesel engine... and there are no explosions taking place. Because of this, Stirling engines are very quiet.

 Invented by Robert Stirling in 1816, the Stirling engine has the potential to be much more efficient than a gasoline or diesel engine. But today, Stirling engines are used only in some very specialized applications, like in submarines or auxiliary power generators for yachts, where quiet operation is important. Although there hasn't been a successful mass-market application for the Stirling engine, some very unique future applications are now being tested due to the high efficiency and reliability of these amazing engines. Some of these include Stirling Engines heated by the decay of nuclear material to power long range space probes, space stations and lunar/mars bases.

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