This ship makes it easier to find one’s sea legs, thanks to opposing waves created in specially-designed tanks fitted in the hull.
The ship will house personnel working on offshore installations, and is optimized to provide the best possible comfort when moored adjacent to a platform.
“This concept provides an alternative to the semi-submersible platforms commonly used at present. The aim is to create a more mobile hotel unit which can be leased by oil companies which operate in several parts of the world. Our job has been to give the ship characteristics which make it more comfortable to live on at sea,” explains Sverre Anders Alterskjær at MARINTEK.
The hotel ship, designed by the Stord-based maritime design company SALT, is being built under contract for ship owner Østensjø.
The integrated system designed to reduce rolling of the vessel has been developed by Hoppe Marine and thoroughly tested by Alterskjær and his research colleagues at MARINTEK. They are specialists in investigating new ship and hull concepts using the unique test basins in their laboratories.
The roll damping is achieved using tanks integrated into the bottom and sides of the hull – called “U-tanks” because of their shape.
“The tanks are filled with water which is set in motion in opposing phase to the wave forces acting on the hull,” Alterskjær explains.
- The tanks are fitted with air valves at the top which partially control the water motion in the tanks.
- Valve opening can be adjusted depending on the ships roll period
- The result is reduced rolling and improved comfort for those on board.
The researchers investigated the optimal opening of the valves at the top of the U-tanks and the correct water level relative to the ship design, as well as measurement of the motion of the ship during voyages and in hotel mode.
In addition to the special hull design, the ship is equipped with six so-called “azimuth thrusters” – propeller drives with directional control used to keep the ship in the same position when in hotel mode. The thrusters oppose the external forces from waves, currents and wind, and can also be used to provide forward propulsion. In hotel mode, the direction and speed of each thruster are determined by a control system receiving continuous input from GPS position measurements, among other things (DP – system). The control system was developed by Kongsberg Maritime.
“We have also carried out a range of tests of the system by creating waves, wind and currents of different intensities in our Ocean Basin. During the model tests, Kongsberg’s DP system was linked to MARINTEK’s physical modelling and measurement systems. This enabled control of the model as if it were a full-scale ship.
“Many specialized tests were also performed to investigate the interaction between the hull and the thrusters, and between the thrusters themselves. This gives Kongsberg more possibilities to tune and develop the control system,” says Alterskjær.
Innovative hull design
“The wide-ranging tests have also revealed that the hull design functions optimally and that the ship has the characteristics necessary to handle this type of operation,” says Johannes Eldøy, a marine designer at SALT. “We are competing with an established platform concept, and documentation is very important for the oil companies, which place high priority on safety.”
The Latest on: MARINTEK
- An examination of polyester fiber taut leg mooring systems for deepwateron September 30, 2019 at 5:00 pm
Model tests of a semisubmersible production platform with a ring pontoon and a 16-line mooring system were performed at the Marintek basin in Trondheim. Main objectives were to compare a TMS and a CMS ...
- قائمة المراجعon March 24, 2019 at 1:46 am
Aegisson, G. & Endal, A. 1992. Energy conservation programme in the Indian fisheries. Energy conservation programme. IND38 Ref. 402009.00.02.92. Marintek, Norway ...
- 4. NATIONAL INFRASTRUCTUREon November 13, 2017 at 8:54 am
Marintek A/S, Trondheim, Institute of Marine Research, Bergen, the Institute of Marine Research, Austevoll, Mowi A/S, Fyllingsdalen, Nordland Research Institute, Mörkued, Directorate for Nature ...
- Hybrid ships will soon be on the marketon May 28, 2015 at 5:00 pm
The company is currently testing the technology in a hypermodern hybrid laboratory in collaboration with NTNU and the SINTEF-institute MARINTEK ... (2015, May 29). Hybrid ships will soon be ...
- One step closer to broadband in the Arcticon May 29, 2013 at 4:59 pm
"The systems we operate with today work relatively well in latitudes up to 75 degrees north", said Beate Kvamstad, Project Manager and researcher at MARINTEK – one of the companies involved in the ...
- Kongsberg Participates in Wind Projecton April 19, 2012 at 5:00 pm
Other participants are Statoil, NTE, Light Structures, Trollhetta, NTNU, HiST, SINTEF Energy Research and MARINTEK. The project is one of many projects that have been initiated by the Norwegian ...
- Nor-Shipping announces 2011 Clean Ship and Next Generation Ship winnerson May 31, 2011 at 8:41 am
The news item is from the 2011 event visit gCaptain’s NorShipping 2013 page ... representatives from Det Norske Veritas, Maritim 21, Marintek, Nor-Shipping and Riviera Maritime Media (for ...
- Nor-Shipping 2011 Announces Winners of Clean Ship and Next Generation Ship Awardson May 23, 2011 at 5:00 pm
Nor-Shipping has released names of the winners of the 2011 Clean Ship and Next Generation Ship Awards. The winners ... Maritim 21, Marintek, Nor-Shipping and Riviera Maritime Media (for the ...
- FLAGSHIP-ISEMS Delivers Integrated Ship To Shore Incident Responseon March 24, 2011 at 7:36 am
FLAGSHIP–ISEMS was led by Autronica from Norway. The project was supported, delivered and trialled in conjunction with Lodic and MARINTEK, both also of Norway; Minoan Lines of Greece ...
- Alion to continue development on T-Crafton May 28, 2008 at 5:00 pm
Officials say an Alion-led team, which includes CDI Marine, Raytheon Integrated Defense Systems, Nichols Brothers Boat Builders and Marintek, will develop a skirt and lift system and an overland ...
via Google News and Bing News