Apparatus and method for delivering cryogenic liquid from a supply vessel to receiver vessels

摘要

Apparatus for delivering cryogenic liquid from a supply vessel to a plurality of receiver vessels employs a subcooler that operates at atmospheric pressure. A supply hose delivers cryogenic liquid from the supply vessel to the subcooler, and coaxial hoses deliver cryogenic liquid from the subcooler to the receiver vessels. The subcooler has an inner chamber surrounded by an annular vent space. A predetermined level of cryogenic liquid is maintained in the inner chamber. Cryogenic vapor from the inner chamber continuously vents to atmosphere via the annular vent space. Cryogenic liquid from the supply hose passes through a heat exchanger in the inner chamber to an inner tube of each coaxial delivery hose, the outer tube of which has one end open to the liquid in the inner chamber and has its other end sealed. The delivery hoses are stored in an upright position, so that the inner and outer tubes thereof become filled with cryogenic vapor under pressure.