Refrigeration – Storage of solidified or liquified gas – Liquified gas transferred as liquid
Patent
1989-10-02
1990-05-15
Capossela, Ronald C.
Refrigeration
Storage of solidified or liquified gas
Liquified gas transferred as liquid
62384, 165 32, F17C 1300
Patent
active
049246798
ABSTRACT:
A flexible cryogenic hose is comprised of an inner cryogenic tube surrounded by a concentric heat shield, a closed concentric chamber and an outer protective jacket. At normal ambient temperatures the chamber is completely filled with carbon dioxide gas. As cryogenic liquid is pumped through the inner cryogenic tube, heat is transferred from all structures within the hose, including in particular the carbon dioxide gas in the closed chamber, which runs the length of the cryogenic tube. As the carbon dioxide gas is cooled, it liquefies, thereby substantially evacuating the chamber. The chamber has sufficient structural rigidity to avoid collapse at normal atmospheric pressures. After the cryogenic hose is used, cryogenic flow ceases and the hose warms. In warming, carbon dioxide gas in the chamber gassifies and again refills the chamber. As a result, outgassing from flexible or plastic material from which the hose is made into the chamber, while it is evacuated, is substantially avoided even after repeated cycles of use. Materials particularly adapted for use in flexible hoses, which are normally unsuitable because of their outgassing characteristics for use in vacuum insulated hoses, now become satisfactory materials for use.
REFERENCES:
patent: 2938359 (1960-05-01), Cobb, Jr. et al.
patent: 3777501 (1973-12-01), Sharp et al.
Brigham William D.
Zwick Eugene B.
Capossela Ronald C.
Martella Mario A.
Pavitt, Jr. William H.
Siegemund Ralf H.
Zwick Energy Research Organization, Inc.
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