Wärtsilä has upgraded its popular Wärtsilä 20DF dual-fuel engine, now said to be better suited for variable speed applications with mechanical propulsion.

The upgraded Wärtsilä 20DF dual-fuel engine is said to feature better performance, lower operating costs, improved fuel flexibility and reduced exhaust emissions Photo: Wärtsilä Corporation

The new version delivers increased power output, has a reduced environmental impact and lower fuel consumption. It will also further increase the engine’s fuel flexibility by allowing a much wider gas quality span, down to methane number (MN) 65, while still delivering full output.

The engine’s power per cylinder is increased from 185 to 195 kW, while the methane slip is lowered by as much as 40%, thereby drastically reducing the CO2 emissions. The existing Wärtsilä 20DF control system is replaced by the latest Wärtsilä UNIC all-inclusive automation system. For gen-set applications, skip-firing technology combining torque control with cylinder deactivation to optimise fuel consumption at low engine load, is introduced, reducing energy consumption by 3%.

“The focus at Wärtsilä is on making every effort to support our customers by improving efficiencies, lowering operating costs, and lessening the carbon footprint of operations,” said Lars Anderson, director, product management & sales support, Wärtsilä Marine Power.

“This latest version of the Wärtsilä 20DF achieves all these ambitions, and is a positive move towards reducing greenhouse gas emissions,” he added.