Vapor delivery from a low vapor pressure liquefied compressed gas

A method for controlling the delivery of a vapor component product to an end user from a storage system which contains the component in coexisting liquid and vapor phases, which method comprises:

• (a) withdrawing from the storage system a component stream comprising vapor at a first total pressure and a first temperature;
• (b) passing the component stream through a transfer line to a reservoir having an inlet and an outlet, and condensing vapor in the reservoir to provide a liquid component at a second total pressure and a second temperature at the outlet of the reservoir;
• (c) withdrawing the liquid component from the reservoir, vaporizing the liquid component to yield the vapor component, and providing the vapor component to the end user;
• and
• (d) controlling the first total pressure and the second temperature such that the component stream in the transfer line is essentially all vapor.

A system for delivering a vapor component product to an end user from a storage system which contains the component in coexisting liquid and vapor phases, which system comprises:

• (a) storage vessel which contains the component in coexisting liquid and vapor phases, wherein the storage vessel has an outlet for the withdrawal of vapor from the vessel;
• (b) a reservoir having an inlet and an outlet;
• (c) a transfer line for transferring a component stream comprising vapor from the storage vessel to the inlet of the reservoir;
• (d) cooling means for cooling the reservoir and condensing vapor to form a condensed component therein;
• (e) piping means for withdrawing the condensed component from the outlet end of the reservoir;
• and
• (f) heating means for vaporizing the condensed component to provide the vapor component to the end user.