Refrigeration – Processes – Circulating external gas
Patent
1986-03-21
1990-02-20
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
62 40, F25J 300
Patent
active
049015338
ABSTRACT:
In a process for cooling gas fluid feed material from an initial temperature to a second, cryogenic temperature which utilizes a single mixed refrigerant composition whose respective constituents possess a range of successively lower boiling points, wherein said refrigerant composition is passed through a single closed loop refrigeration cycle involving compression, partial condensation in an aftercooler phase separation, heat exchange and expansion, wherein heat exchange occurs in a cold box containing a warm end and a cold end heat exchanger, said exchangers being thermally connected in series relationship, wherein the improvement comprises regulating the flow rate of the vapor-containing refrigerant stream passing from said partial condensation stage by diverting predetermined amounts of liquid refrigerant from the liquid-containing refrigerant stream, also passing from said partial condensation stage, into said vapor-containing stream, said diverting occurring at a point inside the cold box after said vapor-containing stream exits the warm end heat exchanger, but before it enters the cold end heat exchanger. Apparatus to accomplish the process is also disclosed.
REFERENCES:
patent: 3690114 (1972-09-01), Swearingen et al.
patent: 3964891 (1976-06-01), Krieger
patent: 3970441 (1976-07-01), Etzbach
patent: 4033735 (1977-07-01), Swenson
patent: 4094655 (1978-06-01), Krieger
Fan Chung T.
Oelschlegel Hannes
Capossela Ronald C.
Linde Aktiengesellschaft
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