Gas turbine with external free-piston combustor

Details Gas turbine with external free-piston combustor Gas turbine with external free-piston combustor

1987-08-14

1989-03-28

Husar, Stephen F.

Power plants

Internal combustion type free piston device supplies motive...

123 46A, 384100, F02B 7104

Patent

active

048152943

ABSTRACT:
AN external-combustion gas turbine in which the fuel combustion takes place in a free-piston combustor. The gas turbine is the motor component of this type of engine and provides external power by means of its shaft. The gas turbine comprises an air compressor and a combusted gas expander both mounted on that same shaft. The compressed air output is directed to a storage-tank and heat-exchanger combination. The air is then admitted in the valve-less free-piston combustor and further compressed. Fuel is burned therein which further raises the pressure of the combusted gas resulting therefrom. The combusted gas is then directed to the storage tank where it exchanges some of its heat content with the compressed air. The combusted gas is then ducted into the turbine inlet and expands therein, providing energy to drive the compressor and yield shaft power. The coupling of motor, fuel combustion process and combusted-gas-pressure raising results in an engine that combines some of the advantages of Diesel engines, gas turbines and Otto-cycle engines, while eliminating some of the disadvantages of each one. This new external combustion engine operates totally differently from Diesel or Otto engines equipped with turbo-chargers and is not to be confused with either.

REFERENCES:
patent: 3005306 (1961-10-01), Bush
patent: 4118927 (1978-10-01), Kronogard
patent: 4332427 (1982-06-01), Sargent et al.

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