Closed loop cryogenic delivery

Details Closed loop cryogenic delivery Closed loop cryogenic delivery

1974-08-23

1976-08-03

O'Dea, William F.

Refrigeration

Low pressure cold trap process and apparatus

62197, 62512, 62514R, F17C 702

Patent

active

039722023

ABSTRACT:
Apparatus for delivering cryogenic liquid to a heat exchanger wherein said liquid is vaporized for its cooling effect comprising a return conduit for conveying from a heat exchanger to a separator vessel spent fluid including some vapor, the return conduit discharging at its upper end into the portion of the vessel holding vapor, a return port for receiving spent fluid from an exchanger, a bypass passage constricted at its upper end providing a flow path in parallel with flow through an exchanger from a feed junction to a more elevated return junction, the flow being conducted in an upwards direction to the feed junction and from the feed junction into the bypass passage, the apparatus providing closed loop circulation of cryogenic liquid to a heat exchanger, with the driving force for the circulation being supplied by the differential head between cryogenic liquid in the feed conduit and spent fluid in the return conduit.

REFERENCES:
patent: 2270934 (1942-01-01), Dickieson, Jr.
patent: 3025680 (1962-03-01), De Brosse et al.
patent: 3697021 (1972-10-01), Howard

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