Patent ID: 11959593
Assignee: GAZTRANSPORT ET TECHNIGAZ
Field: Measurement (Instruments)
Classification: CPC F  G | IPC F  G

Claim 20:
21. The liquid gas storage installation as claimed in claim 20, wherein the secondary insulation space has at least one injection duct arranged to inject the inert gas and at least one extraction duct arranged to extract the inert gas, which tank comprises at least one pressure sensor, wherein at least some sensors among the plurality of temperature sensors are also configured to determine the temperature of the inert gas enclosed in the secondary insulation space, wherein the installation comprises flow measurement devices, in order to measure a flow of inert gas in the injection duct and in the extraction duct, and wherein the leak detection device is also configured to: determine a third variation of mass of inert gas in the secondary insulation space between the first moment and the second moment, the third variation corresponding to the resultant of the total masses of inert gas added by the injection duct and removed by the extraction duct between the first moment and the second moment determine a third mass of inert gas in the secondary insulation space at the first moment, and a fourth mass of inert gas in the secondary insulation space at the second moment based on measurements of the pressure and temperature in a free volume of the secondary insulation space; calculate a fourth variation of mass of inert gas in the secondary insulation space between the first moment and the second moment corresponding to the difference between the fourth mass and the third mass of inert gas; and compare the third variation of mass of inert gas with the fourth variation of mass of inert gas, and trigger an alarm if a difference between the third variation and the fourth variation of mass of inert gas is greater than a second threshold.