Gas expands when heated, and contracts when cooled. Stirling engines move the gas from the hot side of the engine, where it expands, to the cold side, where it contracts.
Let's start from a top dead center of a hot piston. The hot piston moves to the upper part of the cylinder and a cold piston moves to the lower part of the cylinder during first 90 degree revolution. The working air is moved from cold space to hot space. And the pressure in the engine is inclused.
Next 90 degree revolution, the two pistons move both lower part accepting the air pressure. The engine is gotten the power of the operation.
The crank shaft is revoluted by saved power in a flywheel next 90 degree. The hot piston moves to the lower part and the cold piston moves to the upper part. The air is moved from the hot space to the cold space. And the pressure in the engine is decreased.
The two pistons are moved to upper part by the compression of the air during next 90 degree. The engine is gotten the power of the operation in this time.
The two pistons type Stirling engine operates to repeat these distances.
Return to Stirling Engines for Beginners
Go to Stirling Engine Home Page