92-bore engine added to Wärtsilä X-series

26 Apr 2012
Wärtsilä’s X-series super-long-stroke engine family, of which this X35 was the first to run, has been extended upwards with the announcement of an X92 version

Wärtsilä’s X-series super-long-stroke engine family, of which this X35 was the first to run, has been extended upwards with the announcement of an X92 version

Wärtsilä reports that it is extending its offering in the low-speed X-generation engine series with a new X92 electronically-controlled common-rail engine, intended for large container ships above 8,000TEU capacity.

The engine is designed for fuel efficiency and low emissions, with the first example planned for delivery in 2014. The X-series engines feature an extra long stroke and reduced engine revolutions allowing a larger propeller diameter. The company says the X92 is based on well-proven concepts and will offer savings in fuel consumption of 10% and beyond compared to today's fleet. This directly impacts on CO2 emission levels, making it easier to achieve a favourable energy efficiency design index (EEDI). Subsequently, emissions of sulphur oxides and nitrogen oxides decrease as well, compared to earlier solutions. The rpm and power range offer flexibility for a wide variety of vessel speeds.

Wärtsilä launched its low-speed X-generation engine in May 2011 with two mid-sized engines, the X62 and X72, designed specifically for vessels such as capesize bulk carriers, Panamax bulk carriers, Suezmax tankers and Panamax container vessels. The series includes the X35 and X40 engines, which cover the small-bore end of the market, e.g. small bulk carriers and product tankers, general cargo vessels, reefers, feeder containerships, and small LPG carriers. The first electronically controlled X35 engine was started in November 2011 and passed its factory test in February 2012.

"We believe that this series of electronically controlled low-speed, two-stroke engines is absolutely in line with the current and future needs of the marine sector, and the new Wärtsilä X92 is an essential addition to the series. Container vessels are a vital element within the transportation infrastructure supporting the global economy. With the environment and fuel economy likely to be the future market drivers, Wärtsilä is positioned as the most suitable systems provider for extended ship power solutions," says Lars Anderson, vice president, Wärtsilä Ship Power, merchant.

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