Engine designer WinGD has launched four new short-stroke engines for smaller vessels, such as container feeders and RoRo vessels. The piston stroke has been reduced by 413 millimetres, offering a substantial saving in the engine room height needed for installation.
The range with the shorter piston stroke, starting with the X52-S2.0 and X62-S2.0 and their dual-fuel counterparts X52DF-S1.0 and X62DF-S1.0, is ideal for vessels with a shallow draught, small propeller diameter or low main deck height. Container feeders, RoRo and ConRo vessels, multipurpose cargo vessels and vehicle carriers all have design conditions that demand a shorter stroke.
The X62-S2.0 engine has a cylinder bore diameter of 620 millimetres and a piston stroke of 2245 millimetres –compared to a stroke of 2658 millimetres on the standard X62 – with a maximum continuous power of 2685 kilowatts (kW)/cylinder at 108 rotations per minute (rpm). The engine will be available with five to eight cylinders, covering an overall power range of 7600-21,480 kW at 85-108 rpm. The X62DF-S1.0 engine has similar dimensions and a maximum continuous power of 2110 kW/cylinder, for an overall power range of 6925-16,880 kW.
The X52-S2.0 engine has a cylinder bore diameter of 520 millimetres and a piston stroke of 2045 millimetres, with a maximum continuous power of 1910 kW/cylinder at 120 rpm. The engine will be available with five to eight cylinders, covering an overall power range of 5425-15,280 kW at 95-120 rpm. The X52DF-S1.0 engine has a maximum continuous power of 1500 kW/cylinder and covers an overall power range of 4950-12,000 kW.
iSCR System
As well as making the engines more compact, the new stroke-to-bore ratio also reduces manufacturing and component cost. Along with design improvements to reduce maintenance and operating costs, the new liquid fuel engines will be fitted with an integrated selective catalytic reduction (iSCR) system. They will be among the first engines to offer the new, compact solution to meeting IMO Tier III NOX limits.
Anticipating Fleet Renewal
‘Our new short-stroke engine series offers a tailored solution for smaller vessels that still require the efficiency and power of two-stroke marine engines,’ says Volkmar Galke, Global Director, Sales WinGD. ‘Many of these vessel types are part of an ageing fleet that means we expect significant fleet renewal – and a big opportunity for our new engines – over the next few years.
The first of the new engines, a six-cylinder version of the X62-S2.0 engine, will be tested at the end of 2021. The first X52-S2.0 engine will follow six months later.
Picture: An example of a WinGD engine (by WinGd).
