Wartsila Corporation has introduced its new 20-cylinder 46F engine for power plant installations burning heavy fuel oil.

The new engine develops 23,000 KW at 600 rpm, suitable for both 50 and 60 Hz electricity generation, and offers more power and fewer emissions than the existing 18-cylinder Wartsila 46 engine, while maintaining the high energy efficiency, the company reported.
 “Therefore the Wartsila 20V46F offers more value for money with lower lifecycle costs,” it said in a statement.
 The new Wartsila20V46F engine develops 1150 KW/cylinder compared with 975 KW/cylinder from the Wartsila 18V46, at 600 rpm (50/60 Hz) as opposed to 500 rpm (50 Hz) and 514 rpm (60 Hz) respectively.
 “The Wنrtsilن 46F is especially environmentally friendly. It has low NOx emissions, down to 710 ppm NOx at 15 per cent oxygen. The Wartsila 20V46F will also be able to comply with the World Bank environmental requirements, which are becoming increasingly stringent,” the statement said.
“However, as it is a known fact that reducing NOx emissions has an adverse impact on fuel consumption, the Wartsila 20V46F incorporates design features which enable optimising the fuel consumption while meeting the required NOx emission levels. Additionally, the engine can minimise the fuel consumption adaptively according to prevailing ambient conditions.”
 Though visually similar to the original Wartsila 46 launched in 1987, the new Wartsila 20V46F engine is packed with new features including twin injection pump and scaleable control, for high performance and low exhaust emissions, regardless of fuel quality. It is ideally suited to applications which place a premium on savings in operating and maintenance costs, superior environmental performance and fuel adaptability.
 The complete Wartsila 20V46F diesel generating set measures 21 m long with an extreme width of 6.275 m and height of 6.2 m above the underside of the baseframe, and has a total weight of 413 tonnes. It is designed to be dismantled to three discrete units, namely the engine with baseframe, generator with baseframe, and the turbocharger module, for separate transport to site. The separate elements are designed for easy assembly on site with minimum installation time. The largest unit is the engine unit, which weighs less than 300 tonnes, conveniently enabling transportation with a heavy lift ship.
 The Wartsila 6F engine was initially introduced for marine applications in 2004 when a six-cylinder engine began running on the test bed in Vaasa. The first Wartsila 46F marine engines entered service at the beginning of 2007.