Wärtsilä 20DF upgrades include more power, less methane slip

The Wärtsilä 20DF dual-fuel engine has been upgraded to deliver better performance, lower operating costs, improved fuel flexibility and reduced exhaust emissions. [Photograph © Wärtsilä Corporation]

Wärtsilä has introduced an upgraded version of its successful Wärtsilä 20DF dual-fuel engine. It says that the new version will deliver increased power output, have a reduced environmental impact, and will feature a 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%, significantly reducing GHG emissions.

The existing Wärtsilä 20DF control system has been replaced by the latest Wärtsilä UNIC all-inclusive automation system. For genset applications, skip-firing technology has been introduced. This combines torque control with cylinder deactivation to optimize fuel consumption at low engine load, is introduced. Energy consumption is reduced by three percent.

“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. This latest version of the Wärtsilä 20DF achieves all these ambitions, and is a positive move towards reducing greenhouse gas emissions,” says Lars Anderson, Director, Product Management & Sales Support, Wärtsilä Marine Power.

The new Wärtsilä 20DF marine engine is better suited for variable speed applications with mechanical propulsion.