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

Technology

P&I Club warns on Enclosed Space Entry & Testing

The London P&I Club says it continues to see cases of injuries and fatalities associated with entry into enclosed onboard spaces, including cargo holds on bulk

OOCL Renews VOD Training Contract

Videotel, producer and distributor of training videos, 3D animation, and e-Learning courses to the maritime market and part of KVH Industries, Inc., (Nasdaq: KVHI),

Tech & Design Solutions for Modern Workboats

EPA Tier 4 regulations (for engines of 804 hp and higher) and propulsion advancements have many manufacturers and vessel designers changing course to adapt to new requirements and customer demands.

Offshore

Hercules Offshore Filing for Bankruptcy Again

Hercules Offshore Inc said it planned to file for prepackaged Chapter 11 bankruptcy, just six months after the rig contractor emerged from bankruptcy protection.

DONG Energy Listing to Value Group at up to $16 Bln

DONG Energy's has set a potential $16 billion price tag on its stock market debut, giving investors a chance to buy into the growth in offshore wind power, but

Østensjø Rederi Orders Another Wind Farm Vessel

Rolls-Royce has signed a contract with shipyard Astilleros Gondan in Spain to design and equip a second Service Operation Vessel for ship owner Østensjø Rederi.

Maritime Safety

US Hospital Ship Aids South Korean Sailor

A U.S. hospital ship conducted a medical evacuation, or “medevac”, May 27 to assist an ailing Republic of Korea sailor aboard a Republic of Korea Navy (ROK-N) submarine.

IACS Recommendations for Emergency Response

Following a further round of discussions on 'Places of Refuge' at the IMO last week, prompted by a submission from the EU Member States, the European Commission,

P&I Club warns on Enclosed Space Entry & Testing

The London P&I Club says it continues to see cases of injuries and fatalities associated with entry into enclosed onboard spaces, including cargo holds on bulk

Vessels

Hansa Offenburg, Hansa Drakenburg Sail Scale-free

Leonhardt & Blumberg was founded in 1903 and has managed more than 180 vessels, the majority of which were general cargo vessels and bulk carriers. Today the company

NASSCO Lays Keel for Jones Act Tanker Liberty

U.S. shipbuilder General Dynamics NASSCO hosted a keel laying ceremony on Thursday, May 26 for the Liberty, one of three new ECO Class Jones Act tankers under a

SAFE Boats Delivers First CIV for Air and Marine Operations

SAFE Boats International (SBI), a manufacturer of aluminum boats located in Bremerton, Wash., has completed the first Coastal Interceptor Vessel (CIV) on contract from U.

 
 
Maritime Security Maritime Standards Navigation Pipelines Port Authority Salvage Ship Repair 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: 0.0719 sec (14 req/sec)