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NATURAL GAS AND PETROLEUM ALTERNATIVE ENERGY GENERATION METHODS, BACK TO 1800S
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What is Stirling Engine?
A Stirling engine is a machine that converts the energy generated by the external heating of a closed chamber into mechanical energy. Also known as a hot air engine. As the heated air expands and compresses, the engine starts to move. It was invented in 1816 by the Scottish priest Reverent Robert Stirling. The engine was developed by his brother, James Stirling. In the time of the inventors, steam-powered machines were used and they were quite dangerous. They set out to find a more reliable alternative. What they wanted was to convert heat energy directly into motion energy.
Working Principle of Stirling Engine
A Stirling engine operates by repeated heating and cooling of an insulated amount of working gas (usually air or gases such as helium, hydrogen).
Gas exhibits behavior defined by gas laws (relative to pressure, temperature, and volume). When the gas is heated, because it is in an insulated space, its pressure rises and affects the power piston, producing a power stroke. When the gas is cooled, the pressure drops and as a result the piston uses some of the work done on its return stroke to recompress the gas. The resulting net work creates force on the spindle. The working gas periodically flows between the hot and cold heat exchangers. The working gas is sealed within the piston cylinders. So there is no exhaust gas here. Unlike other types of piston engines, valves are not needed.
Some Stirling engines use a splitter piston to move the working gas back and forth between cold and hot tanks. The working gas moves by keeping the cylinders at different temperatures thanks to the fact that the power pistons of the multiple cylinders are connected to each other.
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