1.3.2 Derating due to gas feed pressure and lower heating value
Figure 1.2
Derating of output for gas feed pressure and LHV
NOTE!
The above given values for gas feed pressure is before the engine (after the gas regulating unit).
No compensation (uprating) of the engine output is allowed, neither for gas feed pressure higher
than required in the graph above nor lower heating value above 36 MJ/m
3
N
.
Values are given in m
3
N
is at 0 °C and 101.3 kPa.
If the gas pressure is lower than required, a pressure booster unit can be installed before the
gas regulating unit to ensure adequate gas pressure. If pressure arise is not possible the engine
output has to be adjusted according to above.
A 18 kPa higher gas feed pressure is required per 10 °C higher charge air receiver temperature,
due to increased charge air pressure.
Product Guide Wärtsilä 34DF - 3/2012
3
Product Guide
1. Main Data and Outputs
