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
1976-11-10
1978-02-07
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...
417207, F02G 104
Patent
active
040720101
ABSTRACT:
A closed cylinder contains a thermally driven free piston oscillating between hot and cold ends of the cylinder which ends are respectively connected to a thermal lag heating chamber and a turbine/cooling chamber. A thermal regenerator is provided within a cylinder bypass which bypasses a portion of the cylinder between hot and cold rebound chambers which include, respectively, the hot and cold ends of the cylinder. The hot rebound chamber also includes the thermal lag heating chamber. The heating chamber has sufficient thermal lag properties for substantially heating gas therein as the piston is rebounding away from the hot end of the cylinder, thereby sustaining piston oscillation. The cyclical heating and cooling of the working gas in the heating and cooling chambers and in the regenerator as the displacer piston coasts up and down within the bypass region of the cylinder between the rebound chambers produces a modulated pressure for driving the turbine via a nozzle-like conduit interposed between the cylinder and the turbine. The modulated pressure is augmented by orienting the hot end of the bypass and an inlet port of the thermal lag heating chamber so that, while the piston is coasting toward the cold end of the cylinder, gas flowing into the hot end of the cylinder via the bypass is directed into the cylinder in a stream which passes into the heating chamber inlet port and thence into the heating chamber for further heating therein while the piston is still coasting toward the cold end of the cylinder. The overall cycle of this heat engine is regenerative and may loosely be referred to as a modified Stirling cycle. The turbine or motor may drive a generator or alternator to produce electrical power. The turbine may be replaced by a different rotary motor or other fluid driven load.
REFERENCES:
patent: 3767325 (1973-10-01), Schuman
patent: 3782859 (1974-01-01), Schuman
patent: 4012910 (1977-03-01), Schuman
LandOfFree
Thermally driven piston apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermally driven piston apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermally driven piston apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1395323