Free-surface Anti-Rolling Tank
Free Surface Tank is a single partially filled tank that extends across the full breadth of the vessel. Its shape, size and internal baffles allow the liquid inside to slosh from side to side in response to the roll motion of the ship. The phasing of the roll moments acting on the ship and the resultant liquid motion will be such that it reduces the roll motion. They have the added advantage that it is possible to vary tank natural frequency by changes in water level and thus adapt to changes in ship metacentric height.
Best performance
With the integrated monitoring and indicating system, the current optimal water level is displayed in real time to recommend operation on the free surface tank. This system could make the free surface tank keeping its best performance all the time.
Customized Design
Sophisticated free surface tank design for the different types of vessels
Accurate Calculation
CFD tools are used to model the free surface tank to validate flow motions inside. The vessel’s roll behavior with and without the free surface tank is validated using in-house seakeeping analysis programs.
Monitoring and Indicating System
Accurate indicating system and phase lag system ensure optimum antirolling performance