320系列机组课程空调系统描述

航空发表于 2011-3-16 07:54:57

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航空发表于 2011-3-16 07:55:07

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 CCooool lCCoonndditiitoionneeddAAirir 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 PPaacckkInInlelettSSccoooopp OOuutltelettDDuucctt 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 PPaacckkFFlolowwCCoonntrtorol lVVaalvlvee 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. AAirirCCoonndditiitoionnininggPPaacckk MENU AIR CONDITIONING System Presentation 11/40 Pack 1 Pack 2 AAirirCCoonndditiitoionnininggPPaacckkss CCooool lCCoonndditiitoionneeddAAirir The two Air Conditioning Packs operate automatically and independently to provide cool conditioned air. HOT BLEED AIR MENU AIR CONDITIONING System Presentation 12/40 MMixixininggUUnnitit 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 TThhrereeeTTeemmppeeraratuturereZZoonneess 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 ZZoonneeTTeemmppeerraattuurreeSSeeleleccttoorrss 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 MMoodduullee ccoommpplleetteedd AIR CONDITIONING MENU System Presentation 41/40 LLIISSTTOOFFSSUUBBJJEECCTTSS EXIT AUDIO GLOSSARY FCOM RETURN AAIIRRCCOONNDDIITTIIOONNIINNGGPPAACCKKSS RRAAMMAAIIRRVVAALLVVEE EECCAAMMPPAACCKKIINNDDIICCAATTIIOONNSS TTEEMMPPEERRAATTUURREERREEGGUULLAATTIIOONN EECCAAMMCCOONNDDIITTIIOONNIINNGGPPAAGGEE CCAABBIINNFFAANNSS

bocome 发表于 2011-7-31 10:13:22

非正常操作

songsimple 发表于 2012-2-21 07:18:40

谢谢分享好东西拿去学习了

zzyzzy796 发表于 2012-4-4 13:57:27

ding! a a a

tissle 发表于 2014-4-17 10:25:11

好资料，学习中。。。

diguo 发表于 2017-3-13 12:12:38

恩。好东西。好好学些一下。

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320系列机组课程空调系统描述