3 Crankcase size: 2.30 m
3
/crank (inline) & 4.12 m
3
/crank (v-engine)
6.3.2.7 Gas feed pressure
The required fuel gas feed pressure depends on the expected minimum lower heating value
(LHV) of the fuel gas, as well as the pressure losses in the feed system to the engine. The LHV
of the fuel gas has to be above 26 MJ/m
3
at 0°C and 101.3 kPa. For pressure requirements,
see section "Technical Data" and chapter "1.3.2 Output limitations due to gas feed pressure
and lower heating value"
For pressure requirements, see chapters Technical Data and Output limitations due to methane
number.
● The pressure losses in the gas feed system to engine has to be added to get the required
gas pressure.
● A pressure drop of 120 kPa over the GVU is a typical value that can be used as guidance.
● The required gas pressure to the engine depends on the engine load. This is regulated by
the GVU.
6-22 DBAD209883
Wärtsilä 46DF Product Guide6. Fuel System
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