Power plants – Motor operated by expansion and/or contraction of a unit of... – Unit of mass is a gas which is heated or cooled in one of a...
Patent
1976-08-12
1982-04-06
Ostrager, Allen M.
Power plants
Motor operated by expansion and/or contraction of a unit of...
Unit of mass is a gas which is heated or cooled in one of a...
F02G 104
Patent
active
RE0308943
ABSTRACT:
A substantially closed cylinder containing a compressible fluid, such as air, and a free piston for reciprocation within the cylinder, and a number of elongated passageways, each having an end opening into the cylinder and an opposite closed end. The passageways are heated along their lengths. The fin-shaped open end portions and the cylinder wall are cooled. Piston reciprocation is effected by the force of heated expanding gas moving from the closed ends of the passageways to drive the piston in one direction as the gas cools in the region between the piston end and the cooled open ends of the passageways. The piston compresses the gas at the opposite piston face, which gas in turn drives the piston back after the force of the compressed gas exceeds the force of the cooling gas to regularly repeat such cycle.
REFERENCES:
patent: 3807904 (1974-04-01), Schuman
"Free Piston Stirling Engines", by William Beale, SAE Paper 690230, Jan. 1969.
"A Free-Piston Stirling Engine Inertia Compressor for Gas Fired Air Conditioning", Second Conference on Natural Gas Research & Technology, Atlanta, Georgia, Jun. 5, 1972, American Gas Association.
"Free Cylinder Stirling Engines for Solar-Powered Water Pumps", ASME Paper 71-WA/SOL-11.
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