Verification
The solution has been verified through simulation models at Ålesund University College which concluded with a damping potential of 96% (theoretical).
Further, a ship model trial with weight displacement at 15.150 t has been performed at Stadt Towing Tank testing roll and pitch, both active and controlled passive.
This trial shows a following damping:
The solution has been verified through simulation models at Ålesund University College which concluded with a damping potential of 96% (theoretical).
Further, a ship model trial with weight displacement at 15.150 t has been performed at Stadt Towing Tank testing roll and pitch, both active and controlled passive.
This trial shows a following damping:
Active Roll: 79.8%
Active Pitch: 44.4%
Controlled passive damping has show effect up to 36.9%
Active Pitch: 44.4%
Controlled passive damping has show effect up to 36.9%
Technical description
The solution is based on open ballast tanks to sea in vertical direction, stretching over the sea water level.
Utilizing negative- and positive pressure to work counter- phased towards waves.
High volume air compressors, working with low pressure and vacuum manage volume in these tanks. The Active stabilization controller provides optimal filing in these tanks based on input from the ships movement.
The solution is based on open ballast tanks to sea in vertical direction, stretching over the sea water level.
Utilizing negative- and positive pressure to work counter- phased towards waves.
High volume air compressors, working with low pressure and vacuum manage volume in these tanks. The Active stabilization controller provides optimal filing in these tanks based on input from the ships movement.
Functional description
The center level and volume in the tanks is at the variation sea water level. This is to enable the system to “catch” the waves and work together with the nature.
The center level and volume in the tanks is at the variation sea water level. This is to enable the system to “catch” the waves and work together with the nature.
“Catching” the waves enables filling the tanks with seawater without any power consumption. If more filling or load on the tanks is needed, this is applied through the suction side of the compressors.
The compressors, working at high volume of air, but with low pressure and vacuum, require low power consumption.
Application
All ships requiring minimal ship movement for operation will benefit from a stabilization system, enabling them to expand the operational weather window.
All ships requiring minimal ship movement for operation will benefit from a stabilization system, enabling them to expand the operational weather window.
Active Stabilization will ensure this maximum movement in worse weather than today.
The solution can be implemented in all new constructions, and in most cases in existing ships.
Video for clarification
Mohammed Bahaddad
Blog # 4
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