WÄRTSILÄ WARTSILA 20, Product Manual

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1. Main Data and Outputs
The Wärtsilä 20 is a 4-stroke, non-reversible, turbocharged and intercooled diesel engine with
direct injection of fuel.
200 mm Cylinder bore ........................................
280 mm Stroke ....................................................
8.8 l/cyl Piston displacement .............................
2 inlet valves and 2 exhaust valves Number of valves ..................................
4, 6, 8, 9, in-line Cylinder configuration ...........................
Clockwise, counterclockwise on request Direction of rotation ..............................
900, 1000 rpm Speed ....................................................
8.4, 9.3 m/s Mean piston speed ...............................
1.1 Maximum continuous output
Table 1-1 Rating table for Wärtsilä 20
Generating sets Main engines Cylinder
configuration
1000 rpm / 50 Hz 900 rpm / 60 Hz 1000 rpm
Generator
[kVA]
Engine
[kW]
Generator
[kVA]
Engine
[kW]
bhp kW
950 800 880 740 1080 800 W 4L20
1420 1200 1320 1110 1630 1200 W 6L20
1900 1600 1760 1480 2170 1600 W 8L20
2140 1800 1980 1665 2440 1800 W 9L20
The mean effective pressure p
e
can be calculated as follows:
where:
Mean effective pressure [bar] P
e
=
Output per cylinder [kW] P =
Engine speed [r/min] n =
Cylinder diameter [mm] D =
Length of piston stroke [mm] L =
Operating cycle (4) c =
Wärtsilä 20 Product Guide - a13 - 6 September 2016 1-1
1. Main Data and Outputs Wärtsilä 20 Product Guide