Air conditioning - Distribution
The distribution system has these sub-systems:
* Main air distribution.
* Flight compartment conditioned air distribution.
* Passenger cabin conditioned air distribution.
* Recirculation system.
* Ventilation system.
* Equipment cooling system.
Main Air Distribution
The main air distribution system gets air from these sources:
* Air conditioning packs.
* Ground conditioned air.
* Recirculation system.
The main distribution manifold collects and mixes air from any
combination of the sources.
Flight Compartment Conditioned Air Distribution
The flight compartment gets conditioned air from the left pack
and the mix manifold. The air goes through a duct on the left
side of the airplane. The flight compartment has supply ducts
and outlets to control the air flow at each station.
Passenger Compartment Conditioned Air Distribution
The passenger conditioned air distribution gets air from the mix
‘manifold’. The air goes through riser ducts and up side walls to
an overhead distribution duct. Outlets along the side walls and
the center of the ceiling divide the air for symmetrical supply.
Recirculation System
The recirculation system uses a fan to move air from the
passenger compartment to the main distribution manifold. This
system reduces the amount of air necessary for the packs to
supply.
Ventilation
The ventilation system uses differential pressure to pull air out
of the airplane. The air moves through overboard vents from the
cabin galley and the lavatory areas.
Equipment Cooling System
The equipment cooling system removes heat from the
equipment in the main equipment center and the flight
compartment.
The distribution system has these sub-systems:
* Main air distribution.
* Flight compartment conditioned air distribution.
* Passenger cabin conditioned air distribution.
* Recirculation system.
* Ventilation system.
* Equipment cooling system.
Main Air Distribution
The main air distribution system gets air from these sources:
* Air conditioning packs.
* Ground conditioned air.
* Recirculation system.
The main distribution manifold collects and mixes air from any
combination of the sources.
Flight Compartment Conditioned Air Distribution
The flight compartment gets conditioned air from the left pack
and the mix manifold. The air goes through a duct on the left
side of the airplane. The flight compartment has supply ducts
and outlets to control the air flow at each station.
Passenger Compartment Conditioned Air Distribution
The passenger conditioned air distribution gets air from the mix
‘manifold’. The air goes through riser ducts and up side walls to
an overhead distribution duct. Outlets along the side walls and
the center of the ceiling divide the air for symmetrical supply.
Recirculation System
The recirculation system uses a fan to move air from the
passenger compartment to the main distribution manifold. This
system reduces the amount of air necessary for the packs to
supply.
Ventilation
The ventilation system uses differential pressure to pull air out
of the airplane. The air moves through overboard vents from the
cabin galley and the lavatory areas.
Equipment Cooling System
The equipment cooling system removes heat from the
equipment in the main equipment center and the flight
compartment.
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