New NSCV Features Powerful, MAN Tier-III, Dual-Fuel Propulsion Package

MAN Diesel & Turbo has signed a contract with Sembcorp Marine in Singapore to supply the dual-fuel propulsion system – including exhaust-gas after-treatment – for a New Semi-submersible Crane Vessel (NSCV) for Heerema Offshore Services.

The scope of the contract – signed on 30 October, 2015 – provides for 12 × MAN 8L51/60DF four-stroke engines + 12 × MAN SCR (Selective Catalytic Reduction) systems. MAN Diesel & Turbo states that the total power output of the engines is some 96 MW and believes it – with the exception of power barges – to be one of the largest engine installations the world has ever seen aboard a single ship. Certainly, it is the first vessel of this size to feature dual- fuel technology and, upon completion, will be the largest vessel of its kind globally. Engine delivery is scheduled for Q1, 2017 with vessel delivery due in Q4, 2018.

This highly efficient package ensures full fuel-flexibility and still more than meets NOx Tier III emission limits at all times – whether within Tier III zones or not – both during operation on LNG, as well as during operation on MGO with the help of the SCR system. MAN Diesel & Turbo states that the engines maintain their high efficiency – also during SCR operation – through integrated and customized control strategies.

“The entire project has special requirements in all aspects – it is absolutely a customized solution and a notable feather in our cap to have been selected as propulsion-system supplier for this unique vessel”, commented Lex Nijsen – Head of Four-Stroke Marine – MAN Diesel & Turbo. “This is not just the largest, dual-fuel propulsion system ever featured on a single vessel, it also ensures Tier-III compliance in all operational scenarios, whether in gas- or MGO-modes, and whether within or without NOx Tier III-controlled areas. The solution MAN Diesel & Turbo is delivering to Sembcorp Marine and Heerema is reliable, efficient, and flexible and meets the highest safety and environmental standards.”