Storage system for cryogenic fluids

Details Storage system for cryogenic fluids Storage system for cryogenic fluids

1993-09-27

1995-06-06

Capossela, Ronald C.

Refrigeration

Utilizing fuel as refrigerant

62 504, 123525, 123527, F25B 1900

Patent

active

054211611

ABSTRACT:
A relief valve is provided in the dip tube line that provides a fixed back pressure of 2-3 psi. When the economizer valve on the economizer circuit opens, the back pressure in the dip tube is the head pressure plus the 2-3 psi created by the relief valve. This pressure creates a path of least resistance through the economizer circuit such that the demand of product will draw gas from the gas head via the economizer line until the pressure falls below the valve set at the regulator. Once the pressure falls below the valve set at the regulator, the regulator closes the economizer circuit and liquid will be drawn through the dip tube. Because the relief valve prevents flow back into the tank, an orifice is provided to allow back flow of the cryogen from the withdrawal line to the tank once delivery of product is stopped.

REFERENCES:
patent: 2456890 (1948-12-01), St. Clair
patent: 2645906 (1953-07-01), Ryan
patent: 2747374 (1956-05-01), Thompson
patent: 2964919 (1960-12-01), Howlett
patent: 3001375 (1961-09-01), Tauscher
patent: 4625753 (1986-12-01), Gustafson
patent: 4956975 (1990-09-01), Gustafson
patent: 5136852 (1992-08-01), Neeser et al.

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