Lars Anderson, Vice President, 4-stroke at Wärtsilä Ship Power, states: “The Wärtsilä 20DF will further accelerate the adoption of LNG as a marine fuel in the US. The ability to meet EPA Tier 4 emissions requirements without the need for exhaust after-treatment, while at the same time increasing the safety and operational flexibility for LNG vessels, provides significant value to our customers.”
The Wärtsilä 20DF is a commercial duty, medium-speed, dual-fuel engine. Engines supplied to the US market will operate primarily on natural gas, with marine diesel oil (MDO) as a pilot fuel or as an emergency backup fuel.
Wärtsilä dual-fuel main and auxiliary engines allow ships to operate on natural gas, which minimizes their environmental footprint and operational costs and also make it possible to operate without exhaust gas after-treatment.
The Wärtsilä 20DF power spans the range from 1,056kW (1,415HP) to 1,584kW (2,122HP) per engine. Wärtsilä’s 4-stroke dual-fuel engine portfolio has the widest power range in the market. The Wärtsilä 20DF, Wärtsilä 34DF and Wärtsilä 50DF output ranges from 1056kW (1,415HP) to 17,550kW (23,515HP) per engine. Wärtsilä has delivered over 1,000 dual-fuel engines. This portfolio of engines currently has over 7 million operating hours.
Wärtsilä’s lean burn, low pressure dual-fuel engine technology utilizes a very low percentage diesel fuel as a pilot ignition source, amounting to about 1 per cent of total energy. This contrasts with other gas engine technologies that employ a significantly higher percentage of diesel pilot fuel. The Wärtsilä lean burn advantage results in lower operational costs and reduced emissions.
Wärtsilä in brief
Wärtsilä is a global leader in complete lifecycle power solutions for the marine and energy markets. By emphasising technological innovation and total efficiency, Wärtsilä maximises the environmental and economic performance of the vessels and power plants of its customers. In 2012, Wärtsilä’s net sales totalled EUR 4.7 billion with approximately 18,900 employees. The company has operations in nearly 170 locations in 70 countries around the world. Wärtsilä is listed on the NASDAQ OMX Helsinki, Finland.
Wärtsilä Corporation, press release