Patent ID: 6948323

Claim:
Method of discharging a liquefied gas stored in a supply tank at a relatively low temperature, below zero degrees on the Celsius scale, between the said tank and a service container, characterized in that it comprises: withdrawing the liquid phase of the said gas from the tank in order to introduce it into the container via an ejector; at the same time removing from the ullage space of the container a portion of the gas phase in order to condense it, at least partly, in a heat exchanger before it is reintroduced into the said container by means of the ejector where condensation is completed with none of the removed gas phase being introduced into and mixing with the liquefied gas stored in the supply tank; utilizing the heat given up by the said gas phase in the heat exchanger to vaporize a portion of the liquid phase in the tank so as to maintain, in the latter, a gas phase favorable to pressure-temperature equilibrium in the tank despite the discharging.