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 February 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

Record Thames Ridership

A record 9.8 million passengers are using the River Thames‎, two years on from the launch of the Mayor's River Action Plan, it was announced today. The River Action Plan,

1st lifejacket for Working at heights

The first lifejacket custom-designed specifically for offshore personnel carrying out rope access or work at height has been developed by Survitec Group, the

Ice Coverage on Great Lakes 89 pct: NOAA

Ice coverage on the Great Lakes is nearing 90 percent, reveals high resolution satellites images from National Oceanic and Atmospheric Administration (NOAA).   The entire Great Lakes is at 88.

Offshore

Tallink & Meyer Turku to Build LNG Ferry

AS Tallink Grupp and Meyer Turku Oy signed a contract for the construction of LNG powered fast ferry for Tallinn-Helsinki route shuttle operations. The dual

1st lifejacket for Working at heights

The first lifejacket custom-designed specifically for offshore personnel carrying out rope access or work at height has been developed by Survitec Group, the

Hercules Offshore Shares Fall 33%

Drilling contractor Hercules Offshore Inc's shares fell as much as 33 percent to a record low on Friday, a day after Deutsche Bank cut its price target on the company's stock to $0.

Maritime Safety

Italy to Begin Naval Exercises off Libya

Italy will begin annual naval exercises this week near the coast of Libya, where a breakdown in order has allowed tens of thousands of migrants to try to reach

Hijacked Indonesian Vessel Found in Philippines

The hijacked Indonesian cargo ship Rehoboth has been found abandoned in waters off Mati town in Davao Oriental province off the southern Philippines coast, says the  the Philippine Coast Guard (PCG).

Canadian Submarines Ready to Hit the Sea

For the first time since they were purchased in 1998, the Royal Canadian Navy has reached a stage where three of its four diesel-electric submarines are now shipshape and available for operations.

Vessels

MOL Expands Container Fleet

Mitsui O.S.K. Lines, Ltd. announced today that the company has signed a deal for construction of four 20,000 TEU containerships with Samsung Heavy Industries.

Record Thames Ridership

A record 9.8 million passengers are using the River Thames‎, two years on from the launch of the Mayor's River Action Plan, it was announced today. The River Action Plan,

Tallink & Meyer Turku to Build LNG Ferry

AS Tallink Grupp and Meyer Turku Oy signed a contract for the construction of LNG powered fast ferry for Tallinn-Helsinki route shuttle operations. The dual

 
 
Maritime Contracts Maritime Standards Naval Architecture Navigation Offshore Oil Pipelines Pod Propulsion Salvage Ship Simulators Winch
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: 0.1365 sec (7 req/sec)