Cogeneration of electricity and refrigeration by work-expanding

Details Cogeneration of electricity and refrigeration by work-expanding Cogeneration of electricity and refrigeration by work-expanding

1987-02-27

1987-12-08

Capossela, Ronald C.

Refrigeration

Processes

Reducing pressure on compressed gas

55 32, 62 20, 62 38, 137 13, F25B 900

Patent

active

047110937

ABSTRACT:
Cogeneration of electricity and saleable refrigeration is achieved by passing pipeline gas with added methanol through a turbo-expander coupled to an electrical generator so that moisture in the gas forms an aqueous methanol condensate separable from the cold, expanded gas. The condensate is distilled to separate discard water from recycle methanol. After recovering refrigeration therefrom, the expanded gas is warmed to a temperature above 32.degree. F. by adding all the required heat as reboiler heat for the distillation and passing the expanded gas in heat exchange with distilled methanol vapor which is liquefied and used partly as reflux and partly as recycle methanol.

REFERENCES:
patent: 3002362 (1961-10-01), Morrison
patent: 3355903 (1967-12-01), LaFleur
patent: 3360944 (1968-01-01), Knapp et al.
patent: 3735601 (1973-05-01), Stannard
patent: 3886757 (1975-06-01), McClintock et al.
patent: 4312851 (1982-01-01), Isalski et al.
patent: 4420950 (1983-12-01), Bodas et al.
patent: 4522636 (1985-06-01), Markbreiter et al.

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