Aircraft Air Conditioning Pack

An ecam electronic centralized aircraft monitor constantly measures the following parameters of the conditioning system.

Aircraft air conditioning pack.

There are two types of air conditioning systems commonly used on aircraft. Vapor cycle air conditioning systems are often used on reciprocating aircraft. Apu or engine 5 th and if necessary 9 th stage bleed air hot is pre cooled by fan air before entering the pack. 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.

If the apu is not available a ground source of air can be used to supply the aircraft. 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. Inside the pack bleed air is cooled by ram air through heat exchangers and an air cycle machine. 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.

Pack flow compressor outlet temperature by pass valve position and pack outlet temperature. However ram air can only be used at a level below 10 000ft. Each acm and its components are often referred as an air conditioning pack the air cycle cooling process uses air instead of a phase changing material such as freon in the gas cycle. On other aircraft douglas aircraft dc 9 series the a c packs are located in the tail.

The air cycle system is often called the air conditioning package or pack. The air conditioning system is based on an air cycle machine acm cooling device which is mostly used in turbine powered aircraft. Citation needed the location of the air conditioning a c pack s depends on the design of the aircraft. Usually air conditioning packs are located left and right wing to body area near the main landing gear of an airplane.

Air cycle air conditioning is used on most turbine powered aircraft. On aircraft which use bleed air for the air conditioning it also provides a flow of air to feed the packs.