Launch of WinGD integrated on SCR engine – ShipInsight


Swiss engine developer WinGD celebrated the launch of the first two-stroke marine engine equipped with its own NOx reduction solution, offering significant reductions in space requirements and installation costs for shipyards seeking to comply with IMO’s strictest NOx emission limits.

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

SCR is one of the most effective methods of reducing NOx emissions in accordance with IMO Tier III requirements. As with all off-engine aftertreatment methods, there are many constraints: high exhaust temperatures are necessary for efficient operation; additional installation costs are incurred for ancillary equipment next to the engine; and more space is required for additional equipment, which means less flexibility in ship design and freight transport configurations.

The X52 engine will have a high pressure (HP) SCR reactor built into the engine, directly at the exhaust manifold. This means that less ancillary equipment and off-engine piping is needed, which reduces installation costs and space requirements. Placing the SCR directly upstream of the turbocharger also means higher operating temperatures, conducive to more efficient NOx removal. The iSCR equipped engine also offers low heat dissipation, easy switching between IMO Tier II and IMO Tier III modes, and the latest automation and control systems from WinGD with monitoring and predictive diagnostic functions. Finally, it offers customers fuel flexibility as HP-SCRs can still run on high sulfur fuels, extending savings to lower operating costs.

The X52 engine with iSCR is the latest collaborative project between WinGD and the China Shipbuilding Power Engineering Institute (CSPI), both owned by CSSC Power Group of China State Shipbuilding Corp. International collaborations are essential to WinGD’s vision to fuel the sustainable energy transition of the shipping industry, providing future-ready customer solutions that ensure continued progress towards IMO’s environmental goals.

NOx emissions aftertreatment is required for all marine engines using heavy fuel oil or marine diesel. WinGD aims to make iSCR available initially for single-turbocharged applications of its low-speed X-series diesel engines. While NOx reduction is also required for high-pressure engines using LNG, the engines WinGD’s low-pressure X-DF dual fuel units comply with IMO Tier III without post-treatment, further reducing installation costs, complexity and space required for shipyards while reducing CAPEX and OPEX for shipowners.

WinGD Global Sales Director Volkmar Galke said: “SCR is a proven way to reduce toxic NOx emissions. Making an on-engine solution more compact has kept developers busy for a long time and we are delighted to have reached this milestone with the help of our partners, and to be able to offer significant savings and greater flexibility of ship design to our customers. “


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