Home » New Order Confirms Popularity of 32/44CR Engine in Fishing Segment

New Order Confirms Popularity of 32/44CR Engine in Fishing Segment

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12V3244CR_2015-03-09_433Complete propulsion package drives influx of orders

Voyager Fishing Company, Ltd., based in Kilkeel, Northern Ireland, has ordered a new trawler/ purse seiner, designed by Salt Ship Design in Norway and to be built at Karstensens Skipsværft in Skagen, Denmark.

The newbuilding will be powered by a propulsion package comprising a MAN 12V32/44CR main engine, a 4, 400-mm ø MAN Alpha VBS 1100 propeller,  two-speed RENK Type RSVL1000 gearbox, and an Alphatronic AT3000 remote control system. Vessel delivery is scheduled for August 2017.

Frederik Carstens, Head of Sales, Offshore/Fishing, MAN Diesel & Turbo,
said: “Fishing is an important segment for the 32/44CR engine. A key reason
behind the demand for the engine is that MAN Diesel & Turbo offers complete
propulsion-package solutions that – in terms of SFOC – are optimised from
start to finish.”

Director Tage Rishøj, Karstensens, stated that Voyager will be one of the
most powerful pelagic-fishing vessels in the world with a bollard pull of more
than 120 ton and commented on its very high efficiency when comparing the
bollard pull with the size/power of the engine.

MAN Voyager picCarstens continued: “The engine has gained a good foothold in the market for
its flexibility, low levels of noise/vibration, reduced smoke during engine start
and operation, and is already building a reputation as an excellent workhorse.”
He concluded: “We are also very pleased with how well the common-rail
system has performed in this key segment.”



A powerful engine
MAN Diesel & Turbo reports that this order is its first for a 12V32/44CR type
with a power rating of 7, 200 kW, making it the hitherto most powerful model
the company has delivered to the pelagic fishery market. The new Voyager
will catch fish in the North Atlantic in an area known for its challenging
weather, a primary reason behind the owner ordering such a powerful engine
with such a large bollard pull.

The Voyager will replace the existing 75.6-metre vessel of the same name
that Karstensens built in 2010, and represents the largest vessel built at the
shipyard to date. Upon completion, the 86.4-metre fishing vessel will have a
loading capacity of more than 3, 200 m3 . Notably, when comparing the two
vessels, the newer model’s larger, optimised propeller has meant that the
shipowner has been able to employ a smaller engine, despite the larger size
of the newbuilding.

MAN Diesel & Turbo reports that the Voyager order is just the latest in a string
of orders the company has landed in the fishing segment for the 32/44CR
engine. These include orders for European tuna boats, and North American
and Scandinavian trawlers, of which two of the latter have been delivered by
Karstensens already this year.














Beneficial propulsion optimisation
The two-speed RENK gearbox offers both economic and environmental
benefits, particularly for fishing vessels and other vessels having a multiple
operational profile or reduced transit speed.

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

The gear box features two gear-ratio settings, which facilitate a reduced
propeller speed at an optimal engine speed. This allows the electric power
generation for the PTO on the gearbox to remain uninterrupted in both
trawling and transit modes in combination with the floating frequency (from 50
to 60 Hz). This, in turn, provides the highest efficiency in all operation modes,
ensuring a reduction in fuel consumption of up to 20%, depending on the
vessel’s operation profile.

Furthermore, cavitation and noise are reduced when operating at low propeller
rpm, which improves the vessel’s fishing capabilities.

Boost injection
The MAN 32/44CR engine also boasts of a special, patented feature for
common-rail engines, called boost injection. SaCoSone, the engine’s safety
and control system, is able to detect a load increase at an early stage and
improve the load response of the engine significantly by activation of a boost Injection in the common-rail control.

If an engine detects a sudden load increase, it changes the injection timing
and increases the rail pressure to about 200 bar. This change leads to higher
engine torque, a reduced speed-drop, a short recovery time, and no additional
air consumption.

Alphatronic 3000 control system
The propulsion control system specified for the Voyager is MAN Diesel &
Turbo’s new and advanced Alphatronic 3000 generation. The installation will
be configured for complete control station set-ups at the main bridge, the
starboard and port indoor bridge wings, aft bridge and the engine control
room. As a special feature for optimised operational economy, the control
system is specified with two-speed gear selection – in addition to the load
control for floating frequency operation.

The MAN Alpha remote control system AT3000 is highly user-friendly and
intuitive with the ability to switch between the two speeds ensuring that the
vessel always operates with the highest possible efficiency. MAN handles all
interfaces to clutch control, PMS, etc.

Additionally, the propeller speed change is performed automatically with the
shaft alternator engaged and in full operation.

An optimised aft-ship solution
The high-efficiency (Alpha High Thrust) AHT propeller nozzle has been
specified in this case for ‘headbox’ mounting. The optimisation and integration
of the large propeller and nozzle into the vessel’s aft-ship design was carried
out in close cooperation with Salt Ship Design.

A propeller- and propulsion-optimised aft-ship solution delivers energy
optimisation, resulting in fuel-consumption savings and lower exhaust-gas
emissions. The fine tuning of the final propeller-blade design has been based
on a careful assessment of the Voyager’s predicted operational
power/speed/duration profiles, while taking onto consideration the
compromises involved in finding the perfect design solution for, for example,
high-speed steaming and maximum pulling power efficiency at trawling speed
with suppression of cavitation and noise.

MAN list 08OCT2015

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