Nov. 26, 2007

New power plant engine burns heavy oil

Here’s the 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 50 and 60 Hz electricity generation. It offers more power and less emissions than the firm’s existing 18-cylinder Model 46 engine, while maintaining high energy efficiency.

The new 20V46F engine develops 1,150 kW/cylinder compared with 975 kW/cylinder from the 18V46, at 600 rpm (50/60 Hz) as opposed to 500 rpm (50 Hz) and 514 rpm (60 Hz), respectively.

Click here to enlarge image

The 46F is especially environmentally friendly. It has low NOx emissions, down to 710 ppm NOx at 15% oxygen, which is the required level in India today, for example. The 20V46F will also be able to comply with the World Bank environmental requirements, the company notes. However, because reducing NOx emissions has an adverse effect on fuel consumption, the 20V46F incorporates design features that enable optimizing the fuel consumption while meeting the required NOx emission levels. Additionally, the engine can minimize the fuel consumption adaptively according to prevailing ambient conditions.

The new unit features twin injection pump and scalable control for high performance and low exhaust emissions, regardless of fuel quality. It is suited to applications that place a premium on savings in operating and maintenance costs, superior environmental performance, and fuel adaptability.

The complete 20V46F diesel generating set measures 21 m long with a width of 6.275 m and height of 6.2 m above the underside of the base frame and has a total weight of 413 tonnes. It is designed to be dismantled to three discrete units, namely the engine with base frame, generator with base frame, and the turbocharger module for separate transport to site. The elements are designed for easy assembly on site with minimum installation time, the company points out.

Source: Wartsila Corp., John Stenbergin ranta 2, Box 196, FI-00531, Helsinki, Finland.