MAN to power world's most powerful cutter suction dredge

AUGUST 19, 2015 — A  self-propelled cutter suction dredge ordered at Croatian shipbuilder Uljanik Brodogradiliste by Jan de Nul will have a total installed diesel power of over 40,000 kW, making it some 50% more powerful than the group's J.F.J. De Nul, currently the largest cutter suction dredge in the world.

The cutter power will be 8,500 kW and the cutter ladder will weigh around 2,000 tonnes.

"These figures are unrivaled and make the vessel the ultimate tool for dredging hard rock," says Jan De Nul.

The vessel, currently designated JDN8069, will feature one MAN 14V48/60CR and two MAN 9L48/60CR engines plus three step-up Renk Rheine gearboxes for a diesel-electric plant. Renk will also deliver the gearboxes for the cutter-head drive as well as for the dredge and booster pumps.

Lex Nijsen – Vice President and Head of Four-Stroke Marine – MAN Diesel & Turbo, said: "Jan De Nul Group knows MAN very well and much of its fleet features our engines. This new vessel represents a significant development within the dredger segment in that, up to now, the largest installed power on similar vessels was approximately 27-28 MW, a figure the new vessel easily surpasses. I'm confident this order will help Jan De Nul Group maintain its strong presence in the dredging market."

he MAN L/V 48/60CR engine type is one of the most successful engine types used in dredging applications. Among the 56 such engines MAN Diesel & Turbo currently has on order for various marine applications, 14 are for installation in cutter- and hopper-dredge newbuildings for customers in Benelux and China.

All the engines will be built at MAN's main facility in Augsburg, Germany.

The 48/60CR engines are equipped with key, in-house-developed technologies to optimize their economic and ecological performance, including:

  • high-efficiency, TCA-type, exhaust-gas turbochargers
  • advanced, electronic fuel-injection systems
  • electronic hardware and software for engine control, monitoring and diagnosis in the form of MAN Diesel & Turbo's proprietary SaCoSone system

SideView Fixed 0000Total installed Total installed power (kW)     40,975
Individual engine output (kWmech)
16,800 (14V48/60CR)
10,800 kW (9L48/60CR)
Engine fuel     HFO/MDO/ MGO
Cutter power (kW)     8,500
Pump power (kW)     Pump power (kW) 3 × 8,500
Length o.a. (m)     151.3
Width (m)     36.0
Draft (m)     5.8
Speed (kn)     12.0
Suction pipe (mm)     1 × 1.100
Dredging depth (m)     45.0

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