Patent ID: 11879598
Assignee: GAZTRANSPORT ET TECHNIGAZ
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A method for determining a first value of at least one first parameter of execution of a process for cooling an internal space (11) of a fluid-tight and thermally insulative tank (1) intended to be loaded with liquefied gas, said first parameter being chosen among a setpoint final temperature of the cooling method and a variable operating on the cooling power of the cooling process; said tank (1) including at least a thermal insulation barrier (5) and a sealing membrane (6) supported by the thermal insulation barrier (5) and defining the internal space (11); the method including:
successively testing a plurality of different values of said first parameter until a fault is detected, each phase of testing one of the values of the first parameter including:
cooling the internal space (11) of the tank (1) by delivering a cooling power Pf for a cooling time Δ until the temperature in the internal space (11) of the tank (1) reaches a setpoint final temperature Tc; said cooling power Pf or said setpoint final temperature Tc being representative of the tested value of said first parameter;
loading liquefied gas into the internal space (11) of the tank (1) after cooling;
measuring a variable P1 representative of the pressure inside the thermal insulation barrier (5), the variable P1 being measured during the step of cooling the internal space (11) of the tank (1) or during the step of loading the liquefied gas into the internal space (11) of the tank (1) and comparing it to at least one threshold; and
detecting the fault when the variable: P1 crosses the at least one threshold; and

choosing, among the plurality of values tested, as the first value of the first parameter the value of the first parameter for which, during the corresponding test phase, the cooling time Δ is the shortest and no fault has been detected.