Aircraft Air Conditioning Pack

Apu or engine 5 th and if necessary 9 th stage bleed air hot is pre cooled by fan air before entering the pack.

Aircraft air conditioning pack.

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. Pack flow compressor outlet temperature by pass valve position and pack outlet temperature. If the apu is not available a ground source of air can be used to supply the aircraft.

A water separator collects water condensed by the cooling process to avoid icing. Air cycle air conditioning is used on most turbine powered aircraft. However ram air can only be used at a level below 10 000ft. 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.

Inside the pack bleed air is cooled by ram air through heat exchangers and an air cycle machine. 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. An ecam electronic centralized aircraft monitor constantly measures the following parameters of the conditioning system. Vapor cycle air conditioning systems are often used on reciprocating 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. 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.

Pressurization is achieved via the air pressurization 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.