en keyboard_arrow_down
keyboard_arrow_left See all news

Recent News

18 Nov, 2021 /
Icefish
Looking into aquaculture’s crystal ball
It’s a big ask to request a prediction of the future, but in the Blue Economy discussi...
17 Nov, 2021 /
Icefish
Capelin boom
Capelin is booming in Iceland, but marketing and climate change remain challenges.
17 Nov, 2021 /
Icefish
No such thing as fish waste – everything has a use
Part of IceFish Connect, the Fish Waste for Profit Product Utilisation session brought t...
17 Nov, 2021 /
Grimsby Fish Market
Grimsby Fish Market Launches Buying App
Grimsby Fish Market is embracing digital technologies with the introduction of a new Buy...
16 Nov, 2021 /
Icefish
Tub manufacturer faces challenges and opportunities
Sæplast has been producing a range of tubs, boxes and other products in Dalvík and was...
25 Sep, 2014
keyboard_arrow_left See all news

MAN Propulsion Packages for New Trawler Series

Icefish exhibitors announce orders for five fresh-fish trawlers, featuring two different vessel designs and including MAN propulsion, plus aft-ship equipment.
Icelandic trawler operators, HB Grandi, Vinnslustodin hf. and Hradfrystihusid Gunnvör, have announced that they has ordered new-builds based on two different ship designs from specialist fishing-vessel consultants and designers, Nautic and Skipasýn.

Optimised for safety, operational economy and pulling power, the 50-metre-plus vessel series differ in their choice of specified propeller, aft-ship and propeller-nozzle configurations, apart from their principal design differences.

The Nautic vessels for HB Grandi will be propelled by 4-bladed, 3.8-metre MAN Alpha CP Propellers, while the Skipasýn vessels will have larger, slower-running 4.7-metre, 3-bladed versions for a calculated bollard pull above 50 tons.

Styrmir Petersen, of Afltækni ehf, Reykjavik said: "We have been representing MAN Diesel & Turbo for more than 20 years as sales and service agents in the Icelandic market and now we are very pleased again to see increasing activities and investments after the financial crisis and following tough years for Iceland.

Additionally, it is of course both interesting and challenging for us that we will supply new MAN products and services to two state-of-the-art, Icelandic, fresh-fish trawler designs."

High bollard pull at low propeller revolution

Designer/consultant Skipasýn has developed the efficient 50.7-metre trawler design for Vinnslustodin hf. and Hradfrystihusid Gunnvör. In relation to the design and layout of the propulsion plant, the ship designer's fuel-saving focus has been on the deployment of a large, efficient, 4.7-metre propeller.

As a result, the 800 r/min engine (MCR) speed has had to be geared down to an optimal propeller speed of just 89 r/min. Blade-number optimisation resulted in a three-bladed configuration.

At the 2,040 kW operating point, the three-bladed MAN Alpha VBS1020 propeller "using the Alpha High Thrust nozzle "is calculated to deliver a bollard pull above 50 tons.

Both vessels will be built in China by Huanghai Shipbuilding Co. Ltd.

Reduced consumption under more operating conditions


The three Nautic-designed, 55-metre vessels for HB Grandi, which will appear with a distinctive bow design, will be built in Turkey by Celiktrans Shipbuilding Co. Ltd. As with the other series, the selected propulsion engine is MAN's six-cylinder L27/38, accompanied by four-bladed, ducted MAN Alpha VBS 860 propeller models.

A key Alphatronic 3000 control-system feature will be the tailored 'dual-propeller load curves' for optimising towing/trawling and free-sailing conditions.


Floating frequency

The specified, floating-frequency concept for both trawler series increases the flexibility and economical part-load pattern.

The propulsion system is able to operate in 'shaft-alternator mode' with reduced engine and propeller speed (within the corresponding 50 to 60 Hz speed envelope).

With this part-load optimisation feature offering up to 17% lower engine/propeller speed, fuel consumption is accordingly reduced. The L27/38 engines have perfect load and low-speed characteristics for floating frequency: high torque and approx. 50% power is available at speeds reduced from the 60 Hz load point to 50 Hz.

Alphatronic 3000

The general propulsion management and control system specified for both trawler designs is MAN Diesel & Turbo's new, advanced Alphatronic 3000 generation.

The installations will be configured for complete control-station set-ups at the vessels' main bridges, starboard bridge wings, aft bridges and engine-control rooms.
Processing. Please wait.
Loading...