US 12,345,376 B2
Method and system for assisting the management of a liquefied gas transport ship of the type consuming evaporated gas for its propulsion
Nicolas Bordet, Saint Remy les Chevreuse (FR); François Hanat, Saint Remy les Chevreuse (FR); Eric Gentilini, Saint Remy les Chevreuse (FR); and Mikaël Volut, Saint Remy les Chevreuse (FR)
Assigned to Gaztransport et Technigaz, (FR)
Appl. No. 18/038,386
Filed by Gaztransport et Technigaz, Saint Remy les Chevreuse (FR)
PCT Filed Dec. 3, 2021, PCT No. PCT/EP2021/084268
§ 371(c)(1), (2) Date May 23, 2023,
PCT Pub. No. WO2022/117872, PCT Pub. Date Jun. 9, 2022.
Claims priority of application No. 2012627 (FR), filed on Dec. 3, 2020.
Prior Publication US 2023/0349515 A1, Nov. 2, 2023
Int. Cl. B63B 79/40 (2020.01); B63B 79/20 (2020.01); B63B 79/30 (2020.01); F17C 13/02 (2006.01); G01C 21/34 (2006.01); G06F 30/20 (2020.01)
CPC F17C 13/025 (2013.01) [B63B 79/20 (2020.01); B63B 79/30 (2020.01); B63B 79/40 (2020.01); F17C 13/026 (2013.01); G01C 21/3469 (2013.01); G06F 30/20 (2020.01); F17C 2250/032 (2013.01); F17C 2250/0404 (2013.01); F17C 2250/0694 (2013.01); F17C 2265/066 (2013.01); F17C 2270/0105 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A computer-implemented method for assisting a management of a vessel for transporting liquefied gas, the vessel comprising a vapor phase treatment system and at least one tank configured to contain liquefied gas, the vapor phase treatment system being capable of sending boil-off gas exiting the tank to a propulsion engine of the vessel and to a gas combustion unit on board the vessel, the method comprising:
providing an initial state of the tank, said initial state of the tank comprising an initial pressure of the gas phase contained in the tank and an initial temperature of the liquid phase contained in the tank;
providing a forecast path of the vessel;
acquiring weather forecasts;
determining, on the basis of the acquired weather forecasts, at least one environmental parameter of the vessel along said forecast path;
determining a speed curve of the vessel along said forecast path;
generating a tank management scenario defining an evolution of the pressure of the gas phase contained in the tank during said forecast path, and, based on the generated tank management scenario:
a) estimating a curve of an indicative quantity on the basis of the tank management scenario, the indicative quantity being indicative of an operation of the propulsion engine along said forecast path, as a function of said speed curve of the vessel and of said at least one environmental parameter;
b) estimating a curve of an amount of the boil-off gas generated in the tank along said forecast path on the basis of the tank management scenario by using a tank model capable of estimating an amount of the boil-off gas generated in the tank;
c) estimating, on the basis of said curve of the indicative quantity and of said curve of the amount of the boil-off gas generated, a curve of an amount of the boil-off gas generated to be extracted from the tank and a curve of an amount of the boil-off gas generated to be burned in the gas combustion unit; and
displaying to a user the tank management scenario.