MAN to Power Up Nyholmen’s New Trawler

Norwegian shipping company, Nyholmen AS, has chosen MAN main and auxiliary four-stroke engines to power the ‘Kvannøy’, an advanced, 77.25-m purse seiner/trawler. The vessel will be constructed at the Karstensens shipyard in Skagen, Denmark and is due for delivery in June 2015.

The order represents a continuation of the long-running partnership between MAN Diesel & Turbo and fishing concern Hansen Dahl, Nyholmen’s parent company.

The design specification agreed by Nyholmen and Karstensens is at a high level with the latter reporting a clear preference for suppliers and ship components that deliver quality, innovation and reliable running. The partners have chosen a hybrid propulsion package for the new vessel that features a 600 kW/cyl MAN 6L32/44CR main engine.

The order specifies an MAN Alpha VBS1020 propeller (ø4,200 mm) with an AHT propeller nozzle and an option for a rudder bulb. MAN Diesel & Turbo will also supply its newly developed Alphatronic 3000 propulsion control system, including the ECO Speed Pilot for optimal voyage planning and speed setting. 2 × MAN 9L16/24 GenSets (each delivering 940 kWe) will deliver auxiliary power for the hybrid propulsion system, which is a remarkably powerful setup and the first time MAN medium-speed powered GenSets have been employed aboard a fishing vessel of this size.

Birger Dahl Jnr., from Hansen Dahl, responsible for daily operations, said: “Our vessels operate in a tough environment and the power solution is obviously critical. Hansen Dahl has always been very loyal to MAN engines and earlier Alpha propulsion solutions simply because they are reliable and give us the power we require. In fact, this newbuilding will be our fourth with MAN equipment. When drafting the power specifications for the new vessel, we looked no further than MAN Diesel & Turbo.”

Mads Færk – Sales Manager of the Medium Speed Business Unit MSO – MAN Diesel & Turbo, Frederikshavn said: “The industry associates trendsetting technical solutions with Hansen Dahl when they launch new vessels. They have always been frontrunners with developments and the latest technology, which means that they are often benchmarked by competing fishing companies.”

He continued: “After consultation with Hansen Dahl, we decided that the combination of the hybrid propulsion system, floating frequency, rudder bulb, AHT nozzle and common-rail technology would ensure the highest possible operational flexibility and efficiency for the entire load range – from low-load to high-load power modes. We always aim to maintain long-term relationships with our customers and doing repeat business is a sign that we do things right.”

MAN Diesel & Turbo in Frederikshavn reports that this is the first common-rail main engine to be adopted by the Norwegian fishing sector. The propeller will operate at just 115 rpm at full effect, ensuring an optimal bollard pull when fishing for blue whiting and hake and promoting good sailing characteristics in general. Frederikshavn also states that the potential for further orders is promising with further, similar projects currently pending.

The 32/44 common rail engine

The six-cylinder version (32cm bore/44cm stroke) is rated at 3,600 kW and uses the latest MAN Diesel & Turbo common rail technology that allows the flexible setting of injection timing, duration and pressure for each cylinder. This flexibility allows the 32/44CR’s fuel consumption and emissions to be optimised at any point on its operating profile.

The 32/44CR engine series prioritises optimised flexibility and operating economy and also features:

•  improved charge-air cooling
• enhanced turbocharging
•  Miller valve timing
• revised injection timing
• higher compression ratios
•  low swirl inlet ports • variable valve timing (VVT)

The 32/44CR offers multiple operational benefits, including:

•  low fuel-oil consumption
•  low emissions
•  low operating costs
•  low life-cycle costs
•  long service life.

Fuel capability

Kvannøy is specified to run on marine diesel oil (MSD/MDO). However, the 32/44CRs robust and proven common-rail injection system is basically designed for operation using more demanding fuels, including heavy fuel oil (HFO) with viscosities up to 700 cSt at 50 °C and fuel-injection temperatures up to 150 °C.

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Press Release, December 4, 2013