Liquefying and storing a gas

Details Liquefying and storing a gas Liquefying and storing a gas

2007-05-08

2007-05-08

Doerrler, William C. (Department: 3744)

Refrigeration

Gas compression, heat regeneration and expansion, e.g.,...

C062S606000, C062S047100, C062S048200, C128S201210

Reexamination Certificate

active

11131071

ABSTRACT:
Apparatus and methods for improving the safety and efficiency and decreasing the cost of producing liquid gas, such as liquid oxygen, with a small-scale use liquefaction device, according to various embodiments of the present invention. In one embodiment, liquid oxygen barrier may be added to interface between a cryocooler and a dewar to control rate of liquid oxygen escape upon a tipping of the dewar. A boiloff vessel in fluid communication with the dewar allows expanding gas from a tipped dewar to escape while allowing the liquid to safely settle in the boiloff vessel. A temperature sensing circuit, in proximity with a heat dissipator or cold finger of the cryocooler, is operable to break an electrical power circuit of the cryocooler or cooling fan when a sensed temperature exceeds a predetermined temperature. Oxygen purity of a feed stream of gas may be sensed and/or displayed.

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Author Unkown, “Air Liquide- Bulk Gases.” www.airliquide.com, date unknown.
Author Unkown, “Praxair, Inc.—Oxygen Therapy for Infants, Children and Adults.” www.praxair.com, date unknown.
Author Unkown, “Praxair, Inc.—Cyrogenic On-site Air Separation Plants.” www.praxair.com, date unknown.

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