A SHIP OR A FLOATING PLATFORM EQUIPPED WITH A DEVICE FOR REDUCING THE MOVEMENT OF A FREE SURFACE INSIDE A HULL FILLED WITH A LIQUID MEDIUM

摘要

1. A vessel or floating platform (1) for transporting or storing the liquid contained in the tank (3), including a large tank, the liquid being a liquefied gas, preferably selected from the group consisting of methane, ethylene, propane and butane, cooled in the tank ( 2), which is located along its length in the longitudinal direction (XX ') of the vessel and preferably has a cylindrical shape, at least with a partially polygonal cross section and an axis in the longitudinal direction (XX') of the vessel, while the tank is provided with thermal insulation ( 2 c) at least the smallest size of the tank in the horizontal direction, in particular its width, exceeds 20 m and preferably ranges from 25 to 50 m, and its volume exceeds 10,000 m, characterized in that the tank is equipped with at least one device for reducing fluid movements, containing means (21, 22, 30a, 30b, 40, 50) for moving the liquid in the form of liquefied gas inside the tank by forming a horizontal flow directly below the free surface of the liquefied gas, at least locally at a depth equal to at least at least 0.5 m, preferably at least 2 m. 2. The vessel or floating platform according to claim 1, characterized in that the means for moving the liquid in the form of liquefied gas inside the tank are arranged to move the liquefied gas in a direction not parallel to the axial longitudinal direction of the tank, preferably in the transverse direction (YY ') perpendicular to the axial longitudinal direction (XX ') of the tank. 3. A vessel or a floating platform according to claim 1, characterized in that the means for moving the liquid are made in the form of fluid ejection means (40, 50)