10.2.1 Condensation in charge air coolers
Air humidity may condense in the charge air cooler, especially in tropical conditions. The
engine equipped with a small drain pipe from the charge air cooler for condensed water.
The amount of condensed water can be estimated with the diagram below.
Fig 10-1 Condensation in charge air
coolers
Example, according to the diagram:
At an ambient air temperature of 35°C and a relative humidity of
80%, the content of water in the air is 0.029 kg water/ kg dry air.
If the air manifold pressure (receiver pressure) under these condi-
tions is 2.5 bar (= 3.5 bar absolute), the dew point will be 55°C.
If the air temperature in the air manifold is only 45°C, the air can
only contain 0.018 kg/kg. The difference, 0.011 kg/kg (0.029 -
0.018) will appear as condensed water.
DBAD209883 10-3
10. Combustion Air SystemWärtsilä 46DF Product Guide
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