Rolls-Royce Environship Wins International Green Technology Award

By Peter Pospiech at March 28, 2013 05:51
Filed Under: Company News, drive systems, Fuels & Lubes, General, LNG fuel, Shipyards

Rolls-Royce plc has received the Green Ship Technology Award for its Environship concept - a revolutionary design and system solution for cargo ships that reduces CO2 emissions by up to 40 per cent compared to similar diesel powered vessels.
The Environship, which can be adapted for different ship types, incorporates a range of Rolls-Royce technologies to deliver efficiency savings for ship owners. These include a Bergen engine powered by liquefied natural gas (LNG), the Promas combined rudder and propeller, a hybrid shaft generator to optimise use of electrical power and an innovative wave-piercing hull design.

The accolade was awarded at a ceremony in Hamburg, Germany, in connection with the annual Green Ship Technology Conference.
Tony Wood, Rolls-Royce, President - Marine said: "We’re delighted to receive this award for our Environship concept, another endorsement for our belief that only a combination of technologies will maximise environmental and efficiency gains. With a number of Environship vessels already in build, 2013 will be an exciting year, as this awarding winning concept takes to the seas"
The first vessel built to the Environship standard is a fish-feed transporter currently under construction at the Vard Aukra shipyard in Norway, for the Eidsvaag shipping company. The vessel is due for delivery in May this year. In October, the first of two cargo ships for the Norwegian company Nor Lines, will be delivered by the Tsuji Heavy Industries (Jiangsu) Co Ltd in China.
Passenger ship designs are also under development. Last year Rolls-Royce announced that it had signed a teaming agreement with Italian company Lauro Shipping to design innovative new gas powered ferries based on the Environship concept.

The Environship is a complete Rolls-Royce drawing-board-to-shipyard design that unites some of the smartest marine technology available. The result gives craft of up to 5,000 tonnes the capacity to slash carbon emissions by 40 per cent compared with conventional vessels.
Key features   
* Bergen gas engine, producing very low exhaust emissions. Carbon dioxide reduced by around 22 per cent, nitrous oxides (NOx) by more than 90 per cent, and sulphur oxides and soot emissions negligible compared with heavy fuel diesel engines.  
* Patented hydrodynamic bulb-shaped hull allows ships to efficiently pierce and cut through waves rather than slam against them during rough weather. Traditional hulls also risk damage unless speed is reduced. A captain anxious to meet delivery schedules and expensive berthing slots will often compensate for the poor weather slow-down by burning fuel at full speed to hasten arrival.   
* Hybrid shaft generator. In conventional ships the propulsion engine must run at a constant speed, even while stationery, to power the generators used for on-board electricity. In the advanced hybrid model, engine and propeller speed can vary, so producing electricity more efficiently.  
* Promas, an integrated rudder and propeller system. Conventional vessels waste energy because the rear vortex created as the propeller rotates in the water creates drag. This prevents the propeller achieving its full thrust potential. By linking the propeller to the rudder with a special hydrodynamic fairing and connector, water flow aft of both the propeller and rudder is more streamlined, improving operational efficiency and manoeuvrability.

source / image: Rolls Royce


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