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Engine developer WinGD has celebrated the launch of what it claims is the first marine two-stroke engine to carry its own NOx abatement solution.

According to Switzerland-headquartered WinGD, the engine offers ‘dramatic reductions’ in space requirements and installation costs for shipyards seeking to comply with the strictest IMO NOx emission limits.

The X52 low-speed engine with integrated Selective Catalytic Reduction (iSCR) was launched during a ceremony at Dalian Marine Diesel Co. in China. The six cylinder two-stroke engine, with a maximum continuous output of 11,640 kW, will be installed on a 50,000-tonne tanker built by CSSC Chengxi Shipyard for Japanese owner Kumiai Senpaku.

‘SCR is a well-proven way of reducing toxic NOx emissions,’ said WinGD Director of Global Sales, Volkmar Galke. ‘Making a more compact, on-engine solution has occupied developers for a long time and we’re delighted to have reached this landmark with the help of our partners, and to be able to offer big cost savings and even greater ship design flexibility to our customers.’

The X52 engine will have a high-pressure (HP) SCR reactor integrated on-engine, directly to the exhaust manifold, which, according to WinGD, means less off-engine auxiliary equipment and piping is required, reducing installation costs and space requirements. The location of the SCR directly upstream of the turbocharger also means higher operation temperatures, conducive to more effective NOx removal.

The iSCR-fitted engine is also said to offer low heat dissipation, easy switching between IMO Tier II and IMO Tier III modes, and WinGD’s latest automation and control systems with monitoring and predictive diagnostic features. 

Additionally, the engine offers customers ‘fuel flexibility’ in that HP-SCRs can still run on high sulphur fuels.

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