1. Main Data and Outputs
1.1 Technical main data
The Wärtsilä 34DF is a 4-stroke, non-reversible, turbocharged and inter-cooled dual fuel engine with direct
injection of liquid fuel and indirect injection of gas fuel. The engine can be operated in gas mode or in
diesel mode.
340 mmCylinder bore ..............................
400 mmStroke ..........................................
36.3 l/cylPiston displacement ...................
2 inlet valves and 2 exhaust valvesNumber of valves ........................
6 and 9 in-line; 12 and 16 in V-formCylinder configuration .................
clockwise, counterclockwise on requestDirection of rotation ....................
720, 750 rpmSpeed ..........................................
9.6, 10.0 m/sMean piston speed .....................
1.2 Maximum continuous output
Table 1.1 Rating table for Wärtsilä 34DF
Generating setsMain engines
750 rpm
Cylinder
configuration
750 rpm720 rpm
Generator [kVA]Engine [kW]Generator [kVA]Engine [kW]Engine [kW]
32402700313026102700Wärtsilä 6L34DF
48604050470039154050Wärtsilä 9L34DF
64805400626052205400Wärtsilä 12V34DF
86407200835069607200Wärtsilä 16V34DF
The mean effective pressure P
e
can be calculated using the following formula:
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 =
Product Guide Wärtsilä 34DF - 3/2012 1
Product Guide
1. Main Data and Outputs
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