Marine Installation Manual
2021-08
4-95
4 Ancillary Systems
4.10 Engine room ventilation
X72DF
Arrangement 1 — Engine room ventilation system
Functional principle
The ventilation system draws air from outside the vessel using ventilation fans at
the inlet. Ventilation inlets are typically protected with a weather hood and lou
-
vres to minimise the amount of water and other particles entering the system.
The air travels to the engine room where it leaves the ventilation outlets and en
-
ters the engine.
Layout
The engine room ventilation should be arranged in such a way that the main en
-
gine combustion air is
delivered directly to the turbocharger inlet
, locating the
ventilation outlet and turbocharger inlet as close as possible, and directly facing
to each other, ensuring a smooth and direct flow of air.
Figure 4
-
52 Ventilation system arrangement 1 — Engine room ventilation system
By ensuring that the air flow from the ventilation outlet to the turbocharger inlet
is as direct as possible, the air intake is at its coolest. The ventilation arrangement
should limit air from the engine room, mixing with the inlet air and entering the
turbocharger. Limiting this heating effect will keep the engine’s specific fuel con
-
sumption low as a consequence.
TC with filter
The turbocharger is fitted with a filter silencer that reduces noise and prevents
large items from entering the turbocharger. Most turbocharger manufacturers
supply an optional secondary fibre or mat filter that can further remove particles
and oil mist. This can reduce the effort required for scavenge air cooler cleaning.
SM-0511
Main
engine
Auxiliary
generator
Turbocharger
inlets
Ventilation
outlets
Ventilation fans
Ventilation inlet
Weather hood, louvres etc.
Ventilation system
NOTE
WinGD recommends selecting the optional secondary filter to further
assist with removing fine particles and oil mist that may be present in
the engine room.
