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 Reporter August 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

SGS Wet Welding Repairs Approved by DNV GL

DNV GL and Subsea Global Solutions LLC (SGS) say that they have completed an extensive joint research and development program, that will allow permanent repairs

Navy Unmanned Aircraft Sets the Bar

The Navy's X-47B unmanned aircraft has completed its final test aboard 'USS Theodore Roosevelt' (CVN 71) and has returned to its home base at Naval Air Station Patuxent River after eight days at sea
,

Nanotechnology & Big Data: New Review

A report commissioned by the Lloyd’s Register Foundation, reviewing the potential implications of nanotechnology on the safety and performance of engineering assets

Offshore

Joe Barton: Lift Oil Export Ban

A senior U.S. Congressman from Texas has come out in full support of the United States lifting the 40-year old ban on crude oil exports, putting him at odds with

Drydocks World to Participate in SMM 2014

Drydocks World, the leading provider of maritime and offshore services to the shipping, oil, gas, and energy sectors, will participate in the prestigious 26th edition of Shipbuilding,

SBM Offshore Completes Real Estate Divestment

SBM Offshore is pleased to announce that is has completed the sale and lease back of its Monaco real estate portfolio.  The last of the three buildings was sold

Maritime Safety

EU Warship Provides Seychelles CG Training

EU Naval Force Warship 'FGS Berlin' has conducted local maritime capacity building in the Seychelles informs EUCAP Nestor. Three Local Maritime Capacity Building

USCG, National Park Service Rescue Sea Turtle

Members from the U.S. Coast Guard and National Park Service rescued a loggerhead sea turtle Sunday in Oregon Inlet. Watchstanders at Coast Guard Sector North Carolina

Videotel Updates 'Fire Fighting at Sea' Training

Maritime e-Learning provider Videotel, part of KVH Industries, says that it has launched an updated five-part series 'Fire Fighting At Sea', with the support and

Vessels

Gibdock Rreputation Rises in German Market

Gibdock has continued to see its stock rise amongst the German shipowner community over the past year. Indeed the Gibraltar ship repair yard’s recent client list

ClassNK's Noboru Ueda Attends KOTC Delivery Ceremony

Mr. Noboru Ueda, Chairman and President of ClassNK attended the delivery ceremony for the M/T Al Yarmouk, constructed at Daewoo Shipbuilding & Marine Engineering Co.

MARAD Shipbuilding Loan Guarantee

The launch of the Bravante IX, built in a U.S. shipyard, was from the investments made by the Maritime Administration (MARAD) just three years ago. The investment

 
 
Maritime Contracts Maritime Security Naval Architecture Navigation Pipelines Pod Propulsion Port Authority Salvage Ship Repair Sonar
rss | archive | history | articles | privacy | terms and conditions | 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: 0.1150 sec (9 req/sec)