MAN chosen for cruise power and hybrid installation
MAN Diesel & Turbo says that its large four-stroke engines are continuing to be a popular choice for newbuild cruise ships.
A significant recent order came from German shipyard Meyer Werft in Papenburg, which is building new cruise vessels for Norwegian Cruise Line, and which will be powered by diesel-electric systems based on V48/60CR engines.
NCL is an established MAN customer with most of its fleet powered by 48/60 and 58/64 engines. The new ships – accorded the project name ‘Breakaway Plus’ – will be the largest in Norwegian’s fleet. At 163,000gt and accommodating about 4,200 passengers, they are larger, enhanced versions of the previous 146,000gt ‘Breakaway’ class also ordered from Meyer Werft, the second of which, Norwegian Getaway, was recently completed.
The Breakaway Plus vessels will each be powered by five engines – two 14-cylinder and three 12-cylinder V48/60CR Tier II types – capable of delivering a total power of 76,800kW, compared to the four-engine 62,400kW plant driving the two Breakaway class ships. The engines feature the MAN common-rail fuel injection system, suitable for operation with either HFO or distillate fuels. The technology is claimed to offer superior performance in terms of fuel consumption and smoke emissions, especially at part load.
Sokrates Tolgos, head of cruise and ferry sales, MAN Diesel & Turbo, said: “With this new order, we are extremely pleased to continue our long-standing relationship with Norwegian and Meyer Werft, both of whom have always been innovative with high demands for quality standards and professionalism from their suppliers. Norwegian pioneered the concept of Freestyle Cruising offering guests the freedom and flexibility to enjoy their cruise vacation on their own terms. Furthermore, it was the first company to introduce MAN 48/60 common-rail technology into its operating fleet six years ago. Ever since, all its MAN powered newbuilds have been ordered with the fuel saving electronic CR injection system.”
Another significant cruise contract for MAN Diesel & Turbo comes from Miami-based Carnival Cruise Lines. The company is to supply five 48/60CR engines to Fincantieri in Italy, for a diesel-electric newbuilding, first of a planned new class scheduled for delivery in 2016.
At about 133,500gt and with capacity for about 5,000 passengers, this will be the largest vessel in the Carnival fleet. The five-engine power plant comprises two 14V48/60CR and three 8L48/60CR types, delivering at total of 62,400 kW. MAN says that this configuration was selected, after an evaluation period, as providing the best combination of redundancy, safety, power flexibility and reliability. The five engines will be able to run on both HFO and distillates, and are Tier II compliant, offering good fuel economy and smoke emissions, especially at part load, which MAN says results from the use of its common rail technology.
MAN Diesel & Turbo board director Dr Stephan Timmermann said: “This new order is yet another historical milestone for the company in what is a technologically but also commercially demanding market. Gaining the confidence of Carnival Cruise Lines, the world’s largest cruise operator, fills us with pride but we are also aware of the high level of expectation that working with a major, new customer brings. This new cruise order for Carnival Cruise Lines is our second at Fincantieri within a rather short period of time.”
Mr Tolgos said: “The recently increased number of new cruise customers opting for MAN engines encourages us to maintain our focus on continuous innovation without compromise on quality and reliability. We feel honoured to welcome Carnival Cruise Lines as our new customer. This is an excitingly positive milestone for our future growth in this market, which has always been a frontrunner for environment, emission reduction, and state-of-the-art technology.”
Meanwhile, on a smaller scale, but equally technologically important, comes the entry into service of the Norwegian hybrid-powered large fishing vessel Herøyhav, built at the Karstensens yard in Denmark. The 69.95m ship is hallmarked by a flexible MAN-based propulsion package that offers a number of fuel-saving power modes to accommodate its varied operational patterns.
The package consists of a MAN 9L27/38 engine and a two-speed reduction gear that drives a MAN Alpha 4,200mm ducted propeller, in a customised MAN Alpha AHT nozzle. The order is completed by an Alphatronic 2000 control system, including the ECO Speed Pilot for optimal voyage planning and speed setting.
The system is, basically, a combination of electric propulsion and diesel drive, offering flexibility and redundancy, and enabling both engine and propeller to run optimally over a wide power range. The Herøyhav’s auxiliary generators can deliver 1,500kW, which – in combination with the main-engine power of 3,285 kW – offers a total output of 4,785 for trawling or full-speed steaming. On sea trials the ship achieved 11.6 knots with 1,400kW (diesel-electric power, variable propeller speed), 14.0 knots with 2,400kW (diesel-electric, fixed propeller speed), 15.5 knots at 3,285kW (diesel-mechanical) and 16.6 knots at 4,785 kW (diesel-mechanical + electric boost).
Other benefits highlighted by MAN include the low exhaust gas emissions, while the coated propeller shaft, installed with a water-lubricated stern-tube system, eliminates any risk of leakages of stern-tube oil.
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