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
1987-08-05
1989-03-28
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...
60516, 60682, F02G 104
Patent
active
048152900
ABSTRACT:
A heat recovery system utilizing the principle of the Stirling engine includes a gas-containing chamber communicating through control valves alternately with hot and cool gas heat exchangers supplied with waste or other source heat fluid and coolant fluid, respectively, and a blower functions to circulate gas in the chamber alternately through the hot and cool gas heat exchangers and thus alternately to increase and decrease the gas pressure in the chamber. This alternate changing of gas pressure is utilized to operate a work-performing device. In one embodiment, a single chamber contains a piston reciprocative therein by said pressure change. In another embodiment, each of a pair of chambers is coupled through a blower selectively with a hot gas heat exchanger and a cool gas heat exchanger. Control valves govern the delivery of hot gases sequentially first to one and then the other of the pair of chambers while simultaneously delivering cool gases sequentially first to the other and then to the one of the pair of chambers. As each chamber is filled with hot gases the increased gas pressure is caused to flow from the hot chamber to the cold chamber through a gas turbine or other gas-operated power device for performing work.
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