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Figure 9.6 Axial configuration of cylinders (courtesy of STM Power) Beta Stirling Engine

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Piston Regenerator

Figure 9.6 Axial configuration of cylinders (courtesy of STM Power) Beta Stirling Engine

This has a single power piston in the same cylinder and on the same shaft as a displacer piston. The latter is a loose fit piston which serves to move the working gas from the hot zone to the cold heat exchanger. As the working gas is pushed to the hot zone of the cylinder it expands and pushes down the power piston. At the cold end the gas contracts and the momentum of the flywheel helps push the power piston to the hot whilst also compressing the gas. Figure 9.9 is a diagrammatic representation of the system.

Gamma Stirling engine

This is a variation on the beta engine in which the power piston is in a separate cylinder alongside a cylinder accommodating the displacer piston but sharing a common flywheel. The gas flows freely between the two cylinders. This arrangement is often used in multicylinder engines.

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Solar Stirling Engine Basics Explained

Solar Stirling Engine Basics Explained

The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

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