Marine technology company Winterthur Gas & Diesel (WinGD) has introduced three new low-speed, two-stroke engines that are capable of operating on low emission fuels.
As explained, the move comes “in response to the growing demand for more efficient and reliable marine propulsion that serves the needs of an increasingly environmentally sustainable industry”.
The three new engines — X40DF, X82D and X82DF — will provide a wider variety of compliant choices to ship owners, according to WinGD.
“Our industry is calling for greener-shipping… Growing our portfolio of engines ensures that ship owners have the right options to feel confident in their investment,” Klaus Heim, CEO WinGD, said.
X40DF engine for smaller vessels
The new X40DF in its standard configuration is designed to run on LNG, offering the first two-stroke dual-fuel engine for smaller vessels. As the engine is already compliant with all existing emission regulations, including IMO Tier III, the entire support system is reduced due to the absence of the need for any exhaust-gas after-treatment system,
The X40DF, low-pressure, dual-fuel engine is available in 5 to 8 cylinder configuration, covering a power range from 2,775 kW to 7,480 kW, at 104 to 146 rpm.
X82-D engine for larger vessels
For larger vessels WinGD’s new X82-D engine is dual fuel (DF) ready, with the ability to upgrade to operation with LNG, fulfilling requirements for gas-ready notations from classification societies.
The cylinder distance has been reduced to 1440mm from 1505mm, compared to the previous X82-B version in the WinGD portfolio. The brake specific fuel consumption (BSFC) has also been reduced depending on the rating point and the tuning variant chosen. The X82-D engine offers enhanced propulsion options within the VLCC, VLOC and Panamax container vessel segments.
The engine will be available from 6 to 9 cylinders, covering a power output from 16,560 kW at 58 rpm to 49,500 kW at 84 rpm.
Fuel savings amounting to 1170 USD/day (2.6 ton/day consumption at assumed HFO cost of 450 USD/ton) can be achieved for a VLCC running and X82-D engine at 90% engine power, as informed by WinGD.
X82DF dual-fuel engine
Allowing for the same enhanced propulsion options as the X82-D for larger vessels, the new X82DF is the latest among WinGD’s low-pressure X-DF dual-fuel engines. The engine dimensions are based on that of the X82-D diesel engine design but follow the Otto-cycle combustion principle in which gas and air are premixed at the right air-to-fuel ratio.
The X82DF engine has an integrated gas pressure regulation unit (iGPR), replacing the standalone GVU. The pre-chamber technology and the advanced design of the low-pressure gas admission valves offer a high level of combustion stability and reduced emissions. The X82DF NOX emissions produced are below that of the IMO Tier-III level in gas mode without exhaust gas after-treatment. As a result of the low amount of pilot fuel required (<0.5%) at 75% engine load, low particle and SOx emissions are also achieved.
“The uncertainty of the IMO’s Global Sulphur Cap 2020 caused a dip in new build orders early in 2018. However, vessel newbuilding order uptake is once again on the rise and the introduction of these engines further strengthens WinGD’s position in the market,” Dominik Schneiter, V.P Research & Development at WinGD, commented.
“As the marine industry’s leading low-speed gas engine developer, WinGD sees evidence that ship owners are ready to move forward,” Schneiter added.