Wärtsilä introduces a new 46DF engine with a lower specific fuel consumption, higher output and less lifecycle costs.
The addition to the medium-speed engine range has been specifically developed for the high-output market segment, including cruise ships and ferries, merchant vessels, LNG carriers and FSRUs (Floating Storage and Regasification Unit), and offshore vessels and platforms, and is capable of operating on natural gas, heavy fuel oil, or marine diesel oil.
Lower Lifecycle Costs
The 46Df engine comes in two versions. The high efficiency version offers lower fuel consumption with a cylinder power of 1045 kW, while the high power version is capable of a cylinder power of 1145 kW with good engine thermal efficiency. For LNG carrier applications, the engine can offer fuel savings upt to 20 tons/day compared to the first introduced DF engines. With up to 14 fewer cylinders installed, the overall lifecycle installation costs are significantly and positively impacted by roughly 1000 USD/day.
IMO Tier III
When operating in gas mode, the 46DF is already compliant with IMO Tier III regulations without any secondary exhaust gas purification systems. When fuelled by gas, the sulphur oxide (SOx) and carbon dioxide (CO2) emissions are notably reduced, and smokeless operation is attained. In liquid fuel oil mode, the Wärtsilä dual-fuel engines are fully compliant with the IMO Tier II exhaust emission regulations set out in Annex VI of the MARPOL 73/78 convention.
