320系列机组课程空调系统描述

航空

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航空

AIR CONDITIONING MENU System Presentation 1/40
AIR CONDITIONING MENU
System Presentation 2/40
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.
AIR CONDITIONING System Presentation 3/40
The A320 is equipped with two Air Conditioning Packs
located in the wing root area forward of the Landing Gear
Bay.
Let’s look at how a pack works.
MENU
AIR CONDITIONING System Presentation 4/40
HOT BLEED AIR
Pack Flow
Control Valve
Pack Flow
Control Valve
Hot bleed air enters the pack via a Pack Flow Control
Valve. The purpose of this valve is to adjust the flow rate
through the pack.
MENU
AIR CONDITIONING System Presentation 5/40
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The air then passes through several stages within the
pack that progressively cool the air to provide a
Conditioned Air output. In fact sub zero temperatures
can be achieved.
HOT BLEED AIR
MENU
AIR CONDITIONING System Presentation 6/40
CCooool lCCoonndditiitoionneeddAAirir
Two of the stages are heat exchangers that use a flow of
ambient air over them to cool the hot bleed air. This flow
of air enters via a pack inlet scoop and exits via an outlet
duct.
HOT BLEED AIR
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MENU
AIR CONDITIONING System Presentation 7/40
By Pass
Valve
By Pass
Valve
HOT BLEED AIR
So that the output temperature of the pack can be
adjusted a by-pass valve is fitted.
This valve allows warmer air to be mixed with the cold
air.
MENU
AIR CONDITIONING System Presentation 8/40
By Pass
Valve
By Pass
Valve
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The Pack Flow Control Valve, and the By-pass
valve, are regulated by a Pack Controller to vary
the flow rate and temperature output.
Pack
Controller
MENU
AIR CONDITIONING System Presentation 9/40
The Pack Controller also controls the inlet scoop
and outlet duct to vary the amount of air passing
over the heat exchangers.
Note: To avoid ingestion of foreign matter the inlet
scoop and outlet duct close temporarily during take off
and landing.
PPaacckkInInlelettSSccoooopp OOuutltelettDDuucctt
Pack
Controller
MENU
AIR CONDITIONING System Presentation 10/40
To make things simpler let’s define the area within the
yellow box as a pack.
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MENU
AIR CONDITIONING System Presentation 11/40
Pack 1 Pack 2
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The two Air Conditioning Packs operate automatically
and independently to provide cool conditioned air.
HOT BLEED AIR
MENU
AIR CONDITIONING System Presentation 12/40
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Pack 1 Pack 2
The Conditioned Air from the packs is then fed to a
Mixing Unit.
MENU
AIR CONDITIONING System Presentation 13/40
Ram Air
MIXING UNIT
Pack 1 Pack 2
Ram Air
Valve
Ram Air
Valve
In case of failure of both packs Ram Air is provided via a
Ram Air Valve. We will look at the use of RAM AIR in the
Abnormal operation module.
MENU
AIR CONDITIONING System Presentation 14/40
o
5 C o
PACK OUTLET 15 C
TEMP
PACK OUTLET
TEMP
BYPASS VALVE
POSITION
BYPASS VALVE
POSITION
o
120 C o
115 C COMPRESSOR
OUTLET TEMP
COMPRESSOR
OUTLET TEMP
PACK FLOW PACK FLOW
Ram Air
MIXING UNIT
Pack 1 Pack 2
• Pack flow
• Compressor Outlet Temperature
• Bypass Valve Position
• Pack Outlet temperature
Various pack parameters are monitored by ECAM.
They are;
MENU
AIR CONDITIONING MENU System Presentation 15/40
o
5 C o
PACK OUTLET 15 C
TEMP
PACK OUTLET
TEMP
BYPASS VALVE
POSITION
BYPASS VALVE
POSITION
o
120 C o
115 C COMPRESSOR
OUTLET TEMP
COMPRESSOR
OUTLET TEMP
PACK FLOW PACK FLOW
Ram Air
MIXING UNIT
Pack 1 Pack 2
AIR CONDITIONING System Presentation 16/40
[][][][][][] [][]
These parameters, along with the valve positions, are
displayed on the upper part of the ECAM BLEED page.
MENU
AIR CONDITIONING System Presentation 17/40
ECAM BLEED Page
Having discussed the Air Conditioning Packs we will
now look at how temperature and flow regulation is
achieved throughout the aircraft.
MENU
AIR CONDITIONING System Presentation 18/40
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Mixing Unit
The three outputs from the mixing unit feed three
separate aircraft Zones, Cockpit, Forward Cabin, and Aft
Cabin.
Let’s look at how the temperature of the zones is
managed.
Pack
1
Pack
2
MENU
AIR CONDITIONING System Presentation 19/40
Mixing Unit
A Zone Control Computer monitors the temperatures of
the three zones and sends signals to the Pack
Controllers to set the air temperature delivered by the
packs.
Pack
1
Pack
2
Pack
Controller
Pack
Controller
Zone Control
Computer
MENU
AIR CONDITIONING System Presentation 20/40
Mixing Unit
Normally cold air is delivered by the packs and is then
sent to the three zones.
Pack
1
Pack
2
CCooldldAAirir
MENU
AIR CONDITIONING System Presentation 21/40
Hot
Bleed Air
HOT
AIR
TTrirmimAAirirVVaalvlveess
Mixing Unit
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 achieve the demanded
temperature for a zone.
Pack
1
Pack
2
MENU
AIR CONDITIONING MENU System Presentation 22/40
Hot
Bleed Air
HOT
AIR
Mixing Unit
Pack
1
Pack
2
AIR CONDITIONING MENU System Presentation 23/40
Hot
Bleed Air
HOT
AIR
Mixing Unit
Pack
1
Pack
2
AIR CONDITIONING System Presentation 24/40
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,
• a lot of hot air is being
added to the Aft Cabin zone.
Hot
Bleed Air
HOT
AIR
Mixing Unit
Pack
1
Pack
2
MENU
AIR CONDITIONING System Presentation 25/40
Hot Air
Valve
Hot Air
Valve
The Trim Air Valves are supplied via a Hot Air Valve. The
purpose of this valve is to regulate the pressure of the
hot air supplied to the trim system and to act as a shut
off.
Hot
Bleed Air
HOT
AIR
Mixing Unit
Pack
1
Pack
2
MENU
AIR CONDITIONING System Presentation 26/40
The Hot Bleed Air is supplied to the Hot Air Valve from
just downstream of the Pack 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.
HOT
AIR
Mixing Unit
Pack
1
Pack
2
MENU
AIR CONDITIONING System Presentation 27/40
HOT
AIR
Mixing Unit
Pack
1
Pack
2
Zone Control
Computer
The Trim Air Valves and the Hot Air Valve are controlled
by the Zone Control Computer.
MENU
AIR CONDITIONING System Presentation 28/40
Zone Duct
Temperature
Zone Duct
Temperature
HOT
AIR
Mixing Unit
Pack
1
Pack
2
22 0 25 0 29 0
Zone Duct Temperature, which is the temperature of the
air entering a zone,
MENU
AIR CONDITIONING System Presentation 29/40
Zone
Temperature
Zone
Temperature
and the actual zone temperature are monitored by the
Zone Control Computer and presented on ECAM.
18 0 220 250
HOT
AIR
22 0 25 0 29 0
MENU
AIR CONDITIONING System Presentation 30/40
ECAM Air Conditioning Page
The ECAM COND Page contains zone temperature and
trim air system indications.
MENU
AIR CONDITIONING System Presentation 31/40
ECAM CRUISE Page
The ECAM CRUISE Page also contains zone temperature
indications.
[][][][][][] [][]
MENU
AIR CONDITIONING System Presentation 32/40
On the overhead panel there is an AIR COND Panel which
allows pilot control of the air conditioning system.
Let’s look at the controls on this panel in a little more
detail.
MENU
AIR CONDITIONING System Presentation 33/40
The PACK FLOW Switches control their associated pack
flow control valves.
OFF
[][][][][][] [][]
MENU
AIR CONDITIONING System Presentation 34/40
[][][][][][] [][] []
OFF
In the example shown Pack 1 is selected off and is
indicating closed, while Pack 2 is selected on and is
indicating open.
MENU
AIR CONDITIONING System Presentation 35/40
The PACK FLOW Selector permits selection of desired
pack flow.
We will look at the use of this selector in more detail
during the Normal Operation module.
MENU
AIR CONDITIONING System Presentation 36/40
[][][][][][] [][] []
The guarded RAM AIR Switch controls the RAM AIR valve.
In the example shown the RAM AIR valve is indicating
closed.
Use of the RAM AIR switch is restricted to abnormal
conditions that will be discussed later.
MENU
AIR CONDITIONING System Presentation 37/40
The HOT AIR Switch is associated with the Hot Air Valve.
There is a Hot Air valve indication on the ECAM COND
Page.
In the example shown the valve is indicating open.
Now let’s look at temperature control.
HHoottAAirirVVaalvlvee
MENU
AIR CONDITIONING System Presentation 38/40
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The Zone Temperature Selectors are used to adjust the
required temperature for an associated zone.
MENU
AIR CONDITIONING System Presentation 39/40
HOT
AIR
Mixing Unit
Pack
1
Pack
2
Cabin
Fan
Cabin
Fan
Cabin
Fan
Cabin
Fan
Two cabin fans are fitted to reduce the bleed air
requirement, 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 are
no ECAM indications associated with the cabin fans.
MENU
AIR CONDITIONING System Presentation 40/40
On the Overhead Panel there is a CAB FANS sw on the
VENTILATION Panel to control the Cabin Fans. The CAB
FANS sw can be used to switch the fans off in response to
ECAM procedure.
MENU NEXT
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AIR CONDITIONING MENU System Presentation 41/40
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EXIT
AUDIO GLOSSARY FCOM
RETURN
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EECCAAMMPPAACCKKIINNDDIICCAATTIIOONNSS
TTEEMMPPEERRAATTUURREERREEGGUULLAATTIIOONN
EECCAAMMCCOONNDDIITTIIOONNIINNGGPPAAGGEE
CCAABBIINNFFAANNSS

bocome

非正常操作

songsimple

谢谢分享 好东西拿去学习了

zzyzzy796

ding! a a a

tissle

好资料，学习中。。。

diguo

恩。好东西。好好学些一下。