Denmark: Flemming Pedersen Orders MAN Diesel & Turbo’s L27/38 Propulsion Package

Esbjerg-based Danish owner Flemming Pedersen has ordered a replacement for his 2006-trawler – scheduled for 2012 delivery, but now larger, more advanced and again powered by MAN Diesel & Turbo’s L27/38 propulsion package. The complete main propulsion package concept has earned over several decades its favourable position in a number of ship segments – amongst others for medium to large-size fishing vessels. As a matter of fact the original 4 hp Alpha CP Propeller based propulsion package concept materialised for a fishing vessel as early as in 1903.

Today’s about 4,000 hp propulsion package for the new ‘Cattleya’ will include main engine and box coolers, reduction gear with hydraulic shaft brake and a 1,800 kW PTO and shaft alternator, propeller shaft line, sterntube, propeller and propeller nozzle – together with a complete propulsion control and safety system with manoeuvre stations for four bridge positions. The newbuilding number from Karstensens Shipyard is 420 and the number for the current ‘Cattleya’ was 399. The name ‘Cattleya’ will be continued from Flemming Pedersens current vessel and a quick comparison of the vessel specifications show a radical capacity step-up. The length oa grows from 62.6 to 69.9 metre, and with 1.4 metre additional width the tonnage increases from 1,337 to 1,750. Furthermore the new vessel is based on state-of-the-art shipboard equipment and new design solutions together with the fine craftsmanship from Karstensens Shipyard.

Beneficial propulsion optimisation

The MAN L27/38 powered propulsion package might be seen as a direct repeat from the current vessel, but the 9-cylinder 2,999 kW Tier-II engine will be coupled to an (Alpha Module Gear) AMG55 gearbox with a large speed reduction ratio of 800:119 r/min for an even larger and more efficient 4.2 metre ducted CP Propeller. The new high-efficient (Alpha High Thrust) AHT propeller nozzle has been specified in this case for ‘headbox’ mounting. The optimisation and adaptation of the large propeller and nozzle into the vessel’s aft ship design has been carried out in close cooperation with Karstensens’ naval architects and engineers. A propeller and propulsion-optimised aft ship solution equals energy optimisation, resulting in fuel consumption savings and less exhaust gas emission. The fine tuning of the final propeller blade design has been based on a careful assessment of the vessel’s predicted operational power/speed/duration profiles – considering the compromises in finding the perfect design solution for e.g. high-speed steaming and maximum pulling power efficiency at trawling speed with suppression of cavitation and noise.

Floating Frequency

As a result of the vessel’s floating frequency system (from 60 to 50 Hz), the propulsion system is also able to operate in ‘shaft alternator mode’ with reduced engine and propeller speed. With this part-load optimisation feature, offering up to 16.7% lower engine/propeller speed, the fuel consumption is further reduced.

Additionally, the vessel’s electrically-driven retractable 800 kW azimuth thruster propeller can be deployed for low power propulsion, standby, take-home and manoeuvring modes.

Cattleya – main data

Yard: Karstensens Shipyard, Skagen, Denmark

Yard number: 420

Delivery: October 2012

Owner: Cattleya A/S, Flemming Pedersen, Esbjerg, Denmark

Length oa: 69.6 m

Width: 14.2 m

Dept: 8.70 m

Gross tonnage: 1,750

Speed: 16 kn (estimated)

Bollard pull: 68 tons (estimated)

Propulsion package

Engine: MAN 9L27/38

Power: 2,999 kW at 800 r/min

Reduction gear: MAN Alpha AMG55

Type: 67VO55

Reduction ratio: 800:119 r/min

Propeller: MAN Alpha CPP

Type: VBS1080-ODG

Diameter: 4,200 mm

Propeller nozzle: MAN Alpha AHT

Type: FD4240

Controls: Alphatronic 2000

Type: PCS & LMCS (Propulsion Control System & Local Monitoring Control and Safety System)

More fishing vessel propulsion in the pipeline

The MAN L27/38-based propulsion package is popular for high-end Scandinavian and North Atlantic fishing vessels, and Karstensens Shipyard is well positioned in this market. Other recent fishing vessel orders from the yard to be powered by the 2,999 kW L27/38 propulsion packages from MAN Diesel & Turbo, Frederikshavn are:

• ‘Havsnurp’ (newb 419) – for Havsnurp AS (Kjell Inge Hole and Karstein Stølen, Norway)

• ‘Gollenes’ (newb 415) – for Gollenes AS, (Frode Kvalsvik & Asbjørn Ose, Norway)

– both vessels are 62.6 metre 1,375 GT combined purse seiner trawlers – and continues the earlier L27/38-powered ‘Strømegg’, ‘Western Viking’ and ‘Girl Stephanie’ deliveries.

Assembled and tested in Denmark

Even though the Frederikshavn foundry, engine machining and engine production facilities of MAN Diesel & Turbo closed down last year – delivery of Danish assembled and tested L27/38 propulsion engines (a limited number per year) is still possible together with the MAN Alpha propeller and aft ship equipment. Today, MAN Diesel & Turbo in Frederikshavn employs about 470 people with primary focus on R&D and sales of propeller and aft ship equipment, sales of medium-speed engines and propulsion packages for offshore vessels, work boats, tugs and fishing vessels – and the associated PrimeServ after sales, spare parts, upgrade and retrofit services.

[mappress]

Source: mandieselturbo, July 22, 2011;