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
1986-06-18
1988-06-21
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
047518197
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a National Phase application corresponding to PCT/DE 84/00216 filed Oct. 19, 1984.
FIELD OF THE INVENTION
The present invention relates to a thermomechanical converter of the type in which a gas forms the compressible fluid on a gas compressor side of the converter whereas another fluid medium containing a liquid forms a drive for an expansion motor.
BACKGROUND OF THE INVENTION
In a gas compressor, the energy supply is a result of an external combustion of gaseous, liquid or solid fuels and is converted into an adequate compression work.
SUMMARY OF THE INVENTION
According to the invention, a crank chamber receiving an electric motor-generator unit is connected to a movable-wall separator by a first check valve while a tank is connected to this separator by an oppositely directed second check valve to define a secondary fluid circuit for the liquid-containing medium which drives the expansion motor while the primary gas circuit includes a piston which is driven by a crank from this motor-generator unit and has a combustion chamber and cooler connected in parallel to the cylinder of the piston. The gaseous or vaporized working fluid is separated as effectively as possible from the driving fluid in two pressure tanks with different pressures and this pressure potential is to be used for the production of mechanical work or for the operation of a heat pump, respectively a refrigerating machine. In contrast to the known Stirling-motor the gas converter consists of the thermomechanical converter and a separate expansion motor, wherein the pressure difference produced by the converter is turned into mechanical work. Herein, high-pressure gas, preferably helium or hydrogen, is used as working medium for the pressure converter and the motor or the refrigerating machine connected to the pressure tank. In practice, this entails the disadvantage that, when working with high pressures, which is desirable in view of the reduced specific weight, a reliable sealing of the working meduim in the motor or the refrigerating machine becomes impossible. Furthermore, no usual expansion machine is known, which would allow for a dry gas operation.
The present invention avoids both disadvantages, due to the fact that between the thermomechanical converter and the expansion motor, respectively the refrigerating machine a separator is inserted, whereby various and differing working media can be used for the production of pressure in the converter and for the expansion device. Preferably, helium gas with high pressure is used in the converter and a gas-oil mixture in the expansion circuit, the latter allowing for the use of a lubricated and pressure-proof expansion machine.
BRIEF DESCRIPTION OF THE DRAWING
The invention is explained in greater detail with the aid of the embodiments represented in the drawing. In the drawing:
FIG. 1 is a schematic view of the gas compressor;
FIG. 2 is a diagrammatic representation of the pressure distribution of the working gas;
FIG. 3 is a diagrammatic representation of the throughput by volume of the thermomechanical converter;
FIG. 4 is a partial view of a modified embodiment; and
FIG. 5 is a partial view of a further embodiment.
SPECIFIC DESCRIPTION
The gas converter comprises the working cylinder 1, wherein the recuperator piston 2 which is not heat conductive, fastened to the piston rod 3 passing through the cylinder bottom in pressure-sealed manner, is moved approximately sinusoidally between the upper and lower dead center by a crankshaft 5, over a crosshead guide and the piston rod 4. The heat energy necessary for the operation is supplied to the working cylinder 1 over the ribbed heat exchanger 6 inside the combustion chamber 7. The cylinder head and the lower cylinder area 8 are connected through the thermal regenerator 9, the cooler 10 and the mentioned ribbed heat exchanger 6, so that the recuperator piston 2 is solely under the load of the pressure difference resulted from the flow losses in the heat exchangers 6,
REFERENCES:
patent: 3822388 (1974-07-01), Martini et al.
patent: 4455825 (1984-06-01), Pinto
Dubno Herbert
Ostrager Allen M.
Ross Karl F.
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