1. AIR CONDITIONING SYSTEM

2. FUNCTION Air conditioning systems create a safe and comfortable environment for passengers and crews in the aircraft cabin. The air conditioning system keeps the air in the pressurized fuselage compartment at the correct pressure, temperature, freshness.

3. GENERAL LOCATIONS OF AIR CONDITION SYSTEM

4. The air conditioning system consists of the following sub-system: Distribution Pressurization control Air Cooling Temperature Control

5. DISTRIBUTION SYSTEM delivers the conditioned air to the pressurized fuselage. The conditioned air is distributed to five main zones: cockpit (flight compartment) passenger cabin electronic compartment forward cargo compartment aft cargo compartment.

6. ZONES OF THE CONDITIONED AIR

8. THE PRESSURIZATION CONTROL SYSTEM controls the pressure in the fuselage and it operates both automatically and manual backup. The pressure change rate is controlled to give satisfactory pressure value. THE AIR COOLING SYSTEM decreases the temperature of the hot bleed air from the pneumatic system and also reduces the quantity of water in the hot bleed valve. THE TEMPERATURE CONTROL SYSTEM controls the temperature of the air supplied to the cockpit and cabin.

9. Main components of the air conditioning system air conditioning packs a pack flow control valve a by-pass valve pack controllers a mixing unit

10. AIR CONDITIONING SYSTEM COMPONENTS

11. CONDITIONED AIR PROVISION(1) 1) outside air enters the airplane engine 2) compressors within the engine compress this low-density air 3) hot compressed air from the compressor (bleed air) is then transported via ducts to the air conditioning packs 4) the bleed air passes through the pack flow control valve, which regulates the flow of air entering the conditioning packs 5) The bleed air enters the air conditioner units

12. CONDITIONED AIR PROVISION (2) 6) within the A/C unit, two air-to-air heat exchangers supply outside air via a pack inlet scoop and the air exits through an outlet duct 7) as the cold air exits from the conditioning pack, it is mixed with warm air 8) the desired air temperature is achieved by regulating the amount of hot air mixed with the cold conditioned air exiting from the packs through a by-pass valve 9) the regulated air is then fed to a mixing unit which transports the air further on into the cabin and the cockpit

13. Thank you for your attention!