Wärtsilä releases ECA-compliant lean-burn dual-fuel engine to the US market
9 October 2013
Wärtsilä has released its Wärtsilä 20DF US Tier 4- and ECA-compliant dual-fuel engine for sale in the US market. 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 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’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% 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.
The Wärtsilä 20DF is a proven and successful engine, and its release to the US market is in response to the growing demand for natural gas fueled engines, the company said.
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.—Lars Anderson, Vice President, 4-stroke at Wärtsilä Ship Power
In particular, this technology is attracting the attention of global fleet owners operating within the North American Emissions Control Area (ECA), for which the regulations came into force in August 2012. The legislation is aimed at achieving stricter control on emissions of sulfur oxides (SOx), nitrogen oxides (NOx) and particulate matter from vessels. ECAs have also been established in the Baltic Sea and North Sea.
The Wärtsilä 20DF power spans the range from 1,056 kW (1,415 hp) to 1,584 kW (2,122 hpP) 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 1056 kW (1,415 hp) to 17,550 kW (23,515 hp) per engine. Wärtsilä has delivered more than 1,000 dual-fuel engines. This portfolio of engines currently has more than 7 million operating hours.
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