Offshore Hotel Ship Kept Steady by 'Built in Waves'

MarineLink.com
Wednesday, September 25, 2013
Model tank test: Photo credit MARINTEK

This accommodation vessel makes it easier for offshore industry workers to find their sea legs, thanks to opposing waves created in specially-designed tanks fitted in the hull. It is designed by the Stord-based maritime design company SALT, and is being built under contract for ship owner Østensjø.

“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 of MARINTEK, the Norwegian Marine Technology Research Institute.

Built-in waves
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 who 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.

MARINTEK is a company within SINTEF, the largest independent research organization in Scandinavia, and develops and verifies technological solutions, business and operating concepts for the shipping, marine equipment, ocean energy and petroleum industries. MARINTEK’s headquarters and laboratories are in Trondheim, Norway, with subsidiaries in Houston, Texas and Rio de Janeiro, Brazil.
 

Maritime Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter April 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

Vesper Marine Updates WatchMate Vision

Vesper Marine, a manufacturer of marine safety products, announced a free upgrade for its flagship AIS Class B transponder, the WatchMate Vision, streamlining usability,

Wind-powered Oil Recovery Project Green-lighted

The DNV GL-led WIN WIN Joint Industry Project (JIP), which melds offshore wind with offshore oil and gas, shows that for suitable fields,finds that  wind-powered

Barge Master Wins Innovation Award at OTC

The Barge Master T40 motion compensated knuckle boom crane has been recognized for technological innovation, winning the Spotlight on New Technology Small Business

Offshore

Wind-powered Oil Recovery Project Green-lighted

The DNV GL-led WIN WIN Joint Industry Project (JIP), which melds offshore wind with offshore oil and gas, shows that for suitable fields,finds that  wind-powered

Barge Master Wins Innovation Award at OTC

The Barge Master T40 motion compensated knuckle boom crane has been recognized for technological innovation, winning the Spotlight on New Technology Small Business

Keppel Acquires LeTourneau

Keppel Offshore & Marine (Keppel O&M), through its wholly owned subsidiary, Keppel Offshore & Marine USA, Inc., has completed the acquisition of Cameron International

Maritime Safety

American Waterways Operators Elects Chairman

The members of the American Waterways Operators, the national trade association representing the tugboat, towboat and barge industry, elected a new slate of leaders

Barge Master Wins Innovation Award at OTC

The Barge Master T40 motion compensated knuckle boom crane has been recognized for technological innovation, winning the Spotlight on New Technology Small Business

113 Migrants Drown in Libya-Italy Weekend Transits

An estimated 113 people died in four shipwrecks between Libya and Italy at the weekend as the crossing becomes the preferred sea route for migrants to Europe, the

Vessels

Ferry Drydocking Completed on 2-day Turnaround

Great Lakes Shipyard hauled out the Kelleys Island Ferry Kayla Marie on April 18 for its USCG five-year inspection survey. The yard completed all work, and refloated the vessel two days later,

US Coast Guard to Unveil Historic Lifeboat

A ceremony unveiling a historic lifeboat as a new static display in Chatham, Mass. is scheduled for 11 a.m. Friday at U.S. Coast Guard Station Chatham.   The

Crane Upgrade for Jack-up Vessel Sea Installer

Major modification work will bring A2SEA-owned vessel into line with growing demands of offshore wind industry   Damen Shiprepair Amsterdam (DSAm), part of Damen Shiprepair & Conversion,

 
 
Maritime Careers / Shipboard Positions Maritime Standards Navigation Offshore Oil Pipelines Salvage Ship Electronics Ship Repair Ship Simulators Shipbuilding / Vessel Construction
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.0720 sec (14 req/sec)