Closed system refrigeration using a turboexpander

Details Closed system refrigeration using a turboexpander Closed system refrigeration using a turboexpander

1989-05-22

1990-05-08

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 87, 62 93, F25J 300

Patent

active

049234927

ABSTRACT:
The present invention utilizes a turboexpander coupled with a compressor in place of the Joules-Thomson expansion valve in a conventional refrigeration to achieve higher efficiency. More specifically the refrigeration is used in removing condensable hydrocarbons or chemical vapors from air which has been contaminated during loading and unloading at bulk plants. The more efficient turboexpansion cycle allows the use of saturated lower aliphatic hydrocarbons, such as ethane as refrigerant, the use of which would be precluded from normal Joules-Thomson expansion cycles. The turboexpander work is used to drive a compressor which partially recompresses the expanded refrigerant gas, providing an essentially isentropic expansion. Because the turboexpander and the compressor operate on the same fluid, the mass flows through both are equal thereby alleviating control and loading problems.

REFERENCES:
patent: 2494120 (1950-01-01), Ferro, Jr.
patent: 3932159 (1976-01-01), Goldsberry
patent: 3992891 (1976-11-01), Pocrnja
patent: 4490985 (1985-01-01), Wells

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