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

Technology

Insights: Kunkel Weighs in on Propulsion Technology

LNG? Methanol as fuel? Hybrid systems? Tier 4? Reducing noise? Cutting emissions without crushing fuel economy? Marine News readers have questions and Bob Kunkel has answers.

A Sea Change in Waterjet Technology

Longtime waterjet propulsion equipment provider NAMJet introduces key advancements for the workboat sector. Back in 2011, when boat builder Birdon went looking

ATB Design Comes of Age

The emerging trend of marrying the design of an articulated tug and barge (ATB) to a particular propulsion system to maximize efficiencies of that system has, of late,

Offshore

Swiber Applies for Judicial Management Instead of Liquidation

Singapore oilfield services company Swiber Holdings Ltd said on Friday it has applied to place itself under judicial management instead of liquidation.   Swiber

US Oil Drillers Add Rigs for 5th Week in a Row

U.S. drillers this week added oil rigs for a fifth consecutive week, Baker Hughes Inc said on Friday, but the oilfield services provider and some analysts cast

Det Norske to Restore Production at Alvheim after Leak

Norwegian oil firm Det norske said it expected to reach full production at its Alvheim FPSO (floating storage, offloading and producing unit) overnight after a leak,

Maritime Safety

Singapore, Malaysia Conduct Joint Chemical Spill Drill

The Maritime and Port Authority of Singapore (MPA) and the Marine Department of Malaysia (MDM) conducted a joint chemical spill exercise at sea along the East

Crew Kidnapping Rising in Gulf of Guinea - Dryad

In contrast to the substantial numbers of reported incidents across Southeast Asia and the Indian Ocean in recent years, maritime crime now appears to have stabilised

Safety and Preparation on the Brownwater Radar

Weather Channel Forecasters are predicting a “near-average” hurricane season for 2016, but warn that an average season does not mean businesses and residents shouldn’t prepare for the worst.

Vessels

Horizon Delivers Towboat Marty Cullinan for FMT

In June 2016 Horizon Shipbuilding, Inc. of Bayou La Batre, Ala. delivered the M/V Marty Cullinan, a 120’ towboat with a retractable pilot house, to its home port of New Orleans, La.

New Dredger for North Carolina’s Coastal Waterways

The North Carolina Department of Transportation recently took delivery of a new, fully customized cutter suction dredge, which it christened the Dredge Manteo in a ceremony held April 28,

New 'Mega Passenger Ship' for Star Cruises

Elomatic Ltd and Deltamarin Ltd have signed a tri-party engineering contract with shipbuilder MV Werften for the design of Star Cruises’ new Global Class “mega passenger ship,

 
 
Maritime Careers / Shipboard Positions Maritime Security Naval Architecture Navigation Pipelines Port Authority Salvage Ship Simulators Sonar Winch
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: 0.0781 sec (13 req/sec)