NOTE
1) Gas fuel methane number refers to the gas quality at the engine inlet. This may
differ from the average gas quality in LNG tank.
2) Compensating a low methane number gas by lowering the charge air receiver
temperature below 45 °C is not allowed.
3) Compensating a higher charge air receiver temperature than 45 °C by a high
methane number gas is not allowed.
4) The dew point shall be calculated for the specific site conditions. The minimum
charge air receiver temperature shall be above the dew point, otherwise
condensation will occur in the charge air cooler.
5) The charge air receiver temperature is approximately 5 °C higher than the charge
air coolant temperature at rated load (CAC Team to be involved for LT water
temperature info).
6) Glycol usage in cooling water according to document DAAE062266.
7) Min. suction air temperature is 5 °C.
8) High suction air temperature gives a higher air temperature after compressor,
before the charge air cooler, and therefore a higher heat output from the 1-stage
of the charge air cooler, compared to low suction air temperature.
9) Temperatures given above are max. (continuous) operating temperature at site.
For suction air temperatures 40°C, please contact Product Engineering department.
10) The permissible pressure drop in the inlet pipe before the turbocharger is max.
1kPa.
11) The total sum of exhaust gas back pressure and air inlet pressure drop is not
allowed to be higher than 5 kPa.
DBAD209883 1-3
1. Main Data and OutputsWärtsilä 46DF Product Guide