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• integrated self-diagnosis functions • maximum reliability and availability • simple use and diagnosis • quick exchange of (plug-in) modules • trouble-free and time-saving commissioning NOx-eliminating features of the 48/60CR Retarded injection timing delays combustion-heat release, thus lowering combustion chamber temperature peaks and NOx emission. A new piston design provides a higher compression ratio and faster temperature reduction after ignition, further reducing NOx formation. Variable valve timing enables variations in the opening and closing of the inlet valves, thus providing an additional contribution to the minimisation of the SFOC versus NOx emission trade-off. Propeller The RoPax ferry is a twin-screw vessel and the order includes two CP propellers that will be delivered by ALPHA. The specified propellers are MAN’s Alpha CP Propellers type VBS1800-ODF, with a propeller diameter of 5,600 mm and a power density corresponding to 1,169 kW/m2. Each propeller is driven by a twin-in/single-out gearbox and will be powered by two of the 12V48/60CR main-engines. The ferry is designed with two separate engine-rooms with the propeller shaft-lines having different lengths of well over 40 metres. The final propeller-blade design will be hydrodynamically optimised and carefully balanced with a special focus on propulsion efficiency, low noise, and cavitation levels. The total weight of the propeller equipment amounts to almost 300 tons. Propulsion control and manoeuvring will be managed by MAN’s Alphatronic PCS system courtesy of a complete setup with control consoles in the engine-control room, the forward bridge and the bridge wings. About COTUNAV La Compagnie Tunisienne de Navigation – “COTUNAV”– was established in 1959, under the guardianship of The Tunisian Ministry of Transport. Its current president is Ali Khalifa. COTUNAV’s primary interests concern the transport of passengers on regular routes from Tunis to Marseille and Genoa aboard the company’s existing fleet of car ferries. Another major interest of the Tunisian company is its existing RoRo cargo-vessel fleet that conducts container and truck transport between Tunis, Marseille, Genoa, Naples, Livorno and Barcelona. Solid-bulk transport on routes encompassing West Africa and the Middle East is another significant activity. About DSME Daewoo Shipbuilding & Marine Engineering Co., Ltd. (DSME) was established in 1973 at Okpo Bay, Geoje Island, in south-eastern Korea and has since developed into one of the world's premium shipbuilders. DSME’s primary focus is on the commercial, naval, and offshore and plant marine-segments, and it produces container ships, passenger ships, LNG/LPG carriers, submarines, naval destroyers and oil rigs, among many other types of vessel. The company has 31,000 employees and recorded total sales of US $10 billion in 2008. MAN Diesel & Turbo, Press Release |
World’s Largest Ferry Employs Common-Rail Technology
Daewoo Shipbuilding & Marine Engineering Co., Ltd. (DSME) of Korea, one of the world’s largest and most innovative shipyards, has ordered four common-rail 12V48/60CR Tier-II propulsion engines from MAN Diesel & Turbo SE. The prime movers will power a new RoPax ferry for Tunisian ship owner COTUNAV (Compagnie Tunisienne de Navigation).