Three new two-stroke engines have added to shipowners’ options at the smallest and biggest sizes of the low-speed range.
Winterthur Gas & Diesel (WinGD) has launched dual-fuel versions of its 400-mm and 820-mm bore engines, X40DF and X82DF, as well as introducing an updated, ‘dual-fuel ready’ version of its 820-mm bore engine, X82-D.
The X40DF is the first two-stroke dual-fuel engine for smaller vessels, from 10,000-20,000 DWT. The engine is available in five- to eight-cylinder configurations covering a power range or 2,775-7,480 kW.
The dual-fuel ready X82-D is designed to help larger vessels – including very large crude carriers (VLCC), very large ore carriers and Panamax vessels - fulfil gas-ready notations from class societies. The cylinder distance has been reduced from 1,505 mm in the previous X82-B model to 1,440 mm, enabling owners to increase payload capacity. The engine will be available with between six and nine cylinders, covering a power output from 16,560 kW (at 58 rpm) to 49,500 kW (at 84 rpm).
The X82-D engine offers a wear-resistant injection control unit that is easier to overhaul as well as the new WinGD Integrated Control Electronics (WiCE) engine control system. A one-piece crankshaft design further reduces engine length while pistons are fitted with two piston rings for reduced friction losses. An optimised liner design prevents cold-corrosion from occurring within the cylinder.
WinGD claims that fuel savings of up to US$1,170 a day (2.6 tonnes of HFO at a cost of US$450 a tonne) can be achieved for a VLCC running an X82-D engine at 90% engine power.
The dual-fuel X82DF is based on the X82-D diesel engine design.
“The uncertainty of the IMO’s sulphur cap caused a dip in new build orders early in 2018,” said WinGD vice president research and development Dominik Schneiter. “Vessel newbuilding order uptake is once again on the rise and WinGD sees evidence that ship owners are ready to move forward.”