Transfer system for cryogenic liquids

Details Transfer system for cryogenic liquids Transfer system for cryogenic liquids

1997-08-05

2000-04-04

Kilner, Christopher B.

Refrigeration

Storage of solidified or liquified gas

Liquified gas transferred as liquid

62 502, 141 2, 141 4, F17C 702

Patent

active

060446471

ABSTRACT:
A cryogenic liquid transfer system, for servicing a use device, releases stored cryogen from a bulk storage tank to a gas supply tank and a dispenser tank. The liquid cryogen in the gas supply tank is circulated through a circuit that includes a heat exchanger and the gas thus generated is returned to the gas supply tank so as to pressurize it. The pressurized liquid cryogen is released from the gas supply tank so that it flows through a vaporizer. The gas produced by the vaporizer is bubbled through the liquid cryogen in the dispenser tank so as to raise its temperature and pressure to the level required by the use device being serviced. Gas from the vaporizer is then delivered to the space above the liquid cryogen in the dispenser tank to as to create a pressure head that will cause the liquid cryogen to flow to the use device upon release. A venturi is connected to the tubing between the gas supply tank and the dispenser tank and is used to reduce the pressure in the bulk storage tank.

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