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What is the Stirling engine used for?
Stirling engines are energy conversion devices that may be used as prime movers, refrigerating engines or heat pumps. Currently they are used commercially as cryogenic cooling systems and are under development as low noise, low emission automotive engines
Why Stirling engines are not used?
Stirling engines are rarely used for generating electricity. They are basically reciprocating engines and require fairly exotic alloys in their heat exchangers. Although in theory they are fairly efficient they are expensive and bulky
Why is a Stirling engine so special?
Stirling engine has high possibility to achieve low level of noise and vibration because cyclic torque fluctuation is smooth thanks to non-explosive combustion. The development objectives are improvement of the durability and cost reduction of components exposed to high temperature and high pressure such as over 10MPa.
How efficient is a Stirling engine?
The thermal efficiency of Stirling engines is 40% while the efficiency of similar Otto and Diesel engines are 25 and 35%, respectively. The Stirling engine cycle is a closed regenerative thermodynamic cycle, with cyclic expansion and compression of the working fluid at various temperatures
Who uses Stirling engines?
Gotland class submarines use Stirling engines. Stirling engines are a type of reciprocating external heat engine that uses one or more pistons to achieve useful work through some input of heat from an external source.
Can a Stirling engine power itself?
The displacer produces no power itself and only uses enough energy to circulate the gas within the cylinder. Power is extracted from the thermal system by using the volume/pressure variations of the gas at the cold end of the cylinder to push a separate "power piston" back and forth.
Can a Stirling engine run forever?
“So as long as you can get that heat into the thermodynamic cycle, then it will do what you want it to.” Timelines for missions to the outer solar system have mission durations as long as 17 years. The engineers at NASA Glenn believe their Stirling designs have the potential to last longer than 20 years.
Can a Stirling engine be used in a car?
Using this thermopile technology, a Stirling-powered vehicle can drive at highway speeds without having to recharge. MacDowell also redesigned the Stirling engine to have the dimensions and appearance of a standard four-cylinder engine, making it compatible with existing automobiles
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It's an external combustion engine in that the fuel and heat source are entirely outside the main engine, in a similar way to a steam engine. However, unlike a steam engine, it's a closed-loop system so you don't need to top up the water (or any other fluid) - just apply heat and you're ready to go'''
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