Aircraft Air Conditioning Pack

If the apu is not available a ground source of air can be used to supply the aircraft.

Aircraft air conditioning pack.

On aircraft which use bleed air for the air conditioning it also provides a flow of air to feed the packs. On other aircraft douglas aircraft dc 9 series the a c packs are located in the tail. Inside the pack bleed air is cooled by ram air through heat exchangers and an air cycle machine. The air cycle system is often called the air conditioning package or pack.

Usually air conditioning packs are located left and right wing to body area near the main landing gear of an airplane. Citation needed the location of the air conditioning a c pack s depends on the design of the aircraft. An ecam electronic centralized aircraft monitor constantly measures the following parameters of the conditioning system. Cabin temperature control system the temperature and quantity of the air must be controlled to maintain a comfortable cabin environment at all altitudes and on the ground.

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. However ram air can only be used at a level below 10 000ft. Pressurization is achieved via the air pressurization system. Apu or engine 5 th and if necessary 9 th stage bleed air hot is pre cooled by fan air before entering the pack.

Air cycle air conditioning is used on most turbine powered aircraft. A water separator collects water condensed by the cooling process to avoid icing. An air cycle machine acm is the refrigeration unit of the environmental control system ecs used in pressurized gas turbine powered aircraft normally an aircraft has two or three of these acm. Vapor cycle air conditioning systems are often used on reciprocating aircraft.

There are two types of air conditioning systems commonly used on aircraft. Pack flow compressor outlet temperature by pass valve position and pack outlet temperature.