Common-rail 32/44 engines central to RoRo propulsion package
Italian Visemar has placed an order with the Cantiere Navale Visentini yard, near Venice, for a RoRo ship. The vessel will be powered by a complete MAN propulsion package featuring 2 × 9L32/44CR medium-speed engines. The 9L32/44CR engines each develop 5, 040 kW at 750 rpm and are complemented by 2 × Renk RSV 900C gearboxes and 2 × Alpha CPP propellers. The engines fulfill IMO Tier II regulations and will be built at MAN Diesel & Turbo’s Augsburg works in Germany from where they are scheduled for delivery in August 2013. The newbuilding is scheduled to follow in April 2014 and, having already been granted a ‘green passport’ and green star certification, will be one of the most efficient and environmentally friendly vessels in its class.
Best in class
Visemar wanted a ship that delivered the best efficiency and fuel consumption in its class, and accordingly decided upon an entire MAN Diesel & Turbo package. Sokrates Tolgos – MAN Diesel & Turbo – Head of Cruise & Ferry Sales said: “This MAN propulsion system with common-rail engines gives the customer a perfectly synchronised, high-efficiency solution. The engines’ common-rail fuel injection, with its high flexibility, is central to their meeting Tier II exhaust-gas requirements at the lowest possible fuel-consumption, especially in part load.” Tolgos continued: “Another important benefit is the engines’ unmatched performance in terms of minimum smoke emissions, even with lower-quality fuels like HFO. We are very pleased that Cantieri Navali Visentini and shipowner Visemar, two long-standing customers of MAN Diesel & Turbo, expressed their confidence in our company by asking us not only to supply the engines but, additionally this time, the complete propulsion package including MAN Alpha CP propellers.”
Propulsion package
MAN Diesel & Turbo optimised the propulsion system in close cooperation with the Cantieri Navali Visentini shipyard and NAOS, the Italian RoPax/RoRo ship-design specialist. The MAN Alpha CP propellers stem from the new HUB Mark 5 series, Copenhagen which – courtesy of a project-specific special propeller-blade design – deliver a very high propulsive efficiency, leading to substantial fuel-oil savings for the complete propulsion plant. Similarly, the Renk gearboxes work with very low friction, incurring fewer losses and a higher efficiency.
