Aircraft Air Conditioning Pack

A water separator collects water condensed by the cooling process to avoid icing.

Aircraft air conditioning pack.

Inside the pack bleed air is cooled by ram air through heat exchangers and an air cycle machine. Air cycle air conditioning is used on most turbine powered aircraft. There are two types of air conditioning systems commonly used on aircraft. Citation needed the location of the air conditioning a c pack s depends on the design of the aircraft.

In some designs they are installed in the wing to body fairing between the two wings beneath the fuselage. On other aircraft douglas aircraft dc 9 series the a c packs are located in the tail. Vapor cycle air conditioning systems are often used on reciprocating aircraft. An ecam electronic centralized aircraft monitor constantly measures the following parameters of the conditioning system.

Depending on the airport facilities this is either a preconditioned air system supplied by the airport or a mobile generator unit is used to pump air. On aircraft which use bleed air for the air conditioning it also provides a flow of air to feed the packs. The air conditioning system is based on an air cycle machine acm cooling device which is mostly used in turbine powered aircraft. The air cycle system is often called the air conditioning package or pack.

Pressurization is achieved via the air pressurization system. However ram air can only be used at a level below 10 000ft. If the apu is not available a ground source of air can be used to supply the aircraft. Pack flow compressor outlet temperature by pass valve position and pack outlet temperature.

Apu or engine 5 th and if necessary 9 th stage bleed air hot is pre cooled by fan air before entering the pack. Usually air conditioning packs are located left and right wing to body area near the main landing gear of an airplane.