Method and system for densifying cryogenic propellants

Details Method and system for densifying cryogenic propellants Method and system for densifying cryogenic propellants

2005-11-29

2005-11-29

Esquivel, Denise L. (Department: 3744)

Refrigeration

Storage of solidified or liquified gas

With sorbing or mixing

Reexamination Certificate

active

06968704

ABSTRACT:
The present invention relates to methods and systems for densifying liquids, specifically the densification of cryogenic propellants. A preferred system of the present invention subcools and densifies liquid propellants by utilizing a countercurrent gas or liquid flow. The countercurrent flow preferably utilizes a gas having a lower boiling point than the propellants. A packed tower may then be used, at or above atmospheric pressure, to introduce the countercurrent flow to the propellant. This methodology avoids the costs and problems associated with subatmospheric operation. A preferred embodiment is directed toward the densification of liquid oxygen, with a similar embodiment directed toward the simultaneous densification of liquid oxygen and liquid hydrogen. Systems and methods of the present invention may also be used to densify other liquids in similar fashion.

REFERENCES:
patent: 4264567 (1981-04-01), Pinto
patent: 5644920 (1997-07-01), Lak et al.
patent: 6131395 (2000-10-01), Greene et al.
patent: 1116926 (2001-07-01), None

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