No longer is a vessel's performance a question of its installed propulsion system alone. Today, the trend points in the direction of a ship's design including the hull, engines, propulsion system and many other components. The new Rolls-Royce UT 790 CD vessel design is proof of this. Its wavepiercing technology is a well-proven concept for high-speed catamarans and trimarans, and now with the new UT 790 CD vessel design, Rolls-Royce is bringing the benefits of this technology to the offshore market. With the UT 790 CD, we can support offshore exploration and production further and deeper, while at the same time improving safety and minimizing the impact on the environment. The UT 790 CD vessel is a deepwater, anchor-handling vesseland meets all existing regulations from the Norwegian Maritime Directorate and all of the latest international regulations such as SOLAS 2009 and Special Purpose Vessel codes and regulations. It is able to run continuously at service speeds, regardless of the sea state, due to the hull piercing through the water rather than riding on top of the waves, resulting in a reduction of fuel consumption and an improvement increw comfort. At speeds of 14 knots and violent storm conditions (9 m significant high waves), tank tests have shown no water above forecastle deck level. The UT 790 CD has the same fiber and rope capacity, operating with four secondary winches as a traditional anchor handler has with six. The vessel has the power and capacity to handle cable,chain and rope down to 2000 m and fiber rope down to 3000 m. One of many new features on this vessel is the introduction of a threescrew propulsion system, combining a CCP (center controllable pitch propeller) with two Azipull thrusters with nozzles. A Bergen diesel engine BT32-40W16P, rated 8000 kW, drives the CPP. Four Bergen diesel generator sets, C25:33L9A, each engine rated 2880 kW, power the Azipull thrusters and provide general electric power. Combining the thruster with a large single-screw CPP ensures superior power and maneuverability. The propulsion system optimizes fuel efficiency and substantially reduces emissions compared to conventional propulsion systems. This engine meets Clean Design class rules without further exhaust clean-up. However, catalytic converters can be fitted to the generator sets, providing 90% NO(x) reductions. The vessel can achieve the same capability with its three thrusters as conventional solutions with four. Single-screw CPP ensures superior power and maneuverability.
Piercing the waves. Vessel design evolution
Tiefwasser-Ankerziehschiff: Durchstößt die Wellen und stellt eine Weiterentwicklung im Schiffsentwurf dar.
Diesel and Gas Turbine Worldwide ; 41 , 7 ; 32-33
2009
2 Seiten, 2 Bilder
Article (Journal)
English
Online Contents | 2009
Wave-piercing crewboat cat design
Online Contents | 2010
Engineering Index Backfile | 1952
|Tema Archive | 1991