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Airbus A320 CBT # 2 AIR CONDITIONING SYSTEM PRESENTATION (Me) | A320 MENTOR channel. | YouTubeToText
YouTube Transcript: Airbus A320 CBT # 2 AIR CONDITIONING SYSTEM PRESENTATION (Me)
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like the majority of the systems on the
A320 the air conditioning system is
fully automatic and is designed to
provide a comfortable atmosphere in
which to work and
travel we will begin our study of the
system by first looking at the air conditioning
packs the A320 is equipped with two air
conditioning packs located in the wing
rout area forward of the landing gear Bay
Bay
Works hot blade air enters the pack via
a pack flow control valve its function
pack the air then passes through several
stages within the pack heat exchanges
and air cycle
machine so that it is cooled to provide
a conditioned air output
achieved two of the stages are heat
exchangers they cool the hot bleed air
using the flowing ambient air this flow
of air enters via the ram air Inlet flap
flap so that the output temperature of
the pack can be adjusted a bypass valve
valve is
fitted this valve allows warmer air to
be mixed with the cold
air the pack flow control valve and the
bypass valve are regulated by a related
air conditioning system controller to
temperature the related SCS controller
also controls the related air Inlet and
Outlet flaps to adjust the amount of air
blowing through the heat
exchangers note the related Ram a andlet
flap closes during takeoff and Landing
matter to make things simpler let's
define the area within the white box as a
a
pack the two air conditioning packs
operate automatically and independently
air the conditioned air from the packs
unit in case of failure of both packs
Ram air is provided via an emergency Ram
air valve we will look at the use of ram
module various pack parameters are
monitored on the eam they are Pack Flow
compressor Outlet
temperature bypass valve position pack Outlet
temperature these parameters along with
the valve positions are displayed on the
upper part of the ecam bleed page
having discussed the air conditioning
packs we will now look at how
temperature and flow regulation is
aircraft the three outputs from the
mixing unit feed three separate aircraft
zones cockpit forward cabin and F
cabin let's look at how the temperature
the two ACS controllers monitor the
temperatures of the three zones and send
signals to set the air temperature
delivered by the related pack each ACS
controller comprises two lanes one
active and the other in
standby in case of one lane failure the
second lane takes over in case of both
normally cold air is delivered by the
zones since the different areas of the
aircraft may require different amounts
of cooling or heating hot bleed air can
be added via trim air valves to obtain
Zone in the example shown no hot air is
being added to the cockpit
Zone some hot air is being added to the
forward cabin Zone and a lot of hot air
is being added to the after cabin
Zone the trim air valves are supplied
via a hot air valve it regulates the
pressure of the hot air suppli to the
trim system and works as a shut off
valve the hot bleed air is supplied to
the hot air valve Downstream of the Pack Flow
Flow
valves this means that if the Pack Flow
valves are closed there is no air
supplied to the trim
system the hot air valve and the trim
air valves will automatically
close the Cs controller One controls the
cockpit trim air valve and the hot air valve
valve
the Cs controller two controls the
valves the related Zone duct temperature
which is the temperature of the air end
ring zone is also monitored by the SCS
controller cockpit duct temperature by
the SCS controller one forward and F
to the related Zone temperature which is
the temperature of the ambient air is
controllers The Zone duct temperatures
and the Zone temperatures the trim air
Valves and the hot air valve are shown
on the eam
page the ecam cruise page also contains
indications on the overhead panel the
air conditioning panel allows the pilots
to control the air conditioning
system let's look at this control in
detail the pack push button switches
control control the related pack flow control
valves in this example pack one push
button switch is selected off the
related valve is closed pack two push
button switch is selected on the related
open the Pack Flow selector is used to
Flow the guarded Ram Air push button
switch controls the emergency Ram air
valve the example shows the ram a valve
closed the use of this push button
switch is restricted to abnormal
later the hot air push button switch
controls the hot air valve in the
example shown
the valve is open now let's look at the temperature
control the Zone temperature selectors
are used to adjust the required
zone two cabin fans are installed to
recycle cabin air and therefore save
fuel these fans establish a
recirculation flow of air from the three
aircraft zones to the mixing unit in
normal operation there is no we cam
fans the cabin fans push button switch
on the ventilation panel controls the cabin
cabin
fans this push button switch can be used
to switch the fans off in response to
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