Wärtsilä introduces NextDF technology for third engine to reduce methane emissions

Technology group Wärtsilä has introduced its NextDF technology for a third engine, the Wärtsilä 46TS-DF dual-fuel engine. 

While operating on liquefied natural gas (LNG), the Wärtsilä 46TS-DF engine with NextDF feature reduces methane emissions to less than 1.4% of fuel use across all load points, achieving as low as 1.1% in a wide load range. 

This is nearly three times lower than the default methane slip factor of 3%, specified in the FuelEU Maritime and International Maritime Organization (IMO) lifecycle guidelines for otto-cycle four-stroke dual-fuel engines.