Aircraft Air Conditioning Pack

Inside the pack bleed air is cooled by ram air through heat exchangers and an air cycle machine.

Aircraft air conditioning pack.

On other aircraft douglas aircraft dc 9 series the a c packs are located in the tail. 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. Air cycle air conditioning is used on most turbine powered 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.

In some designs they are installed in the wing to body fairing between the two wings beneath the fuselage. However ram air can only be used at a level below 10 000ft. 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.

There are two types of air conditioning systems commonly used on aircraft. Vapor cycle air conditioning systems are often used on reciprocating aircraft. Pack flow compressor outlet temperature by pass valve position and pack outlet temperature. Pressurization is achieved via the air pressurization system.

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

Citation needed the location of the air conditioning a c pack s depends on the design of the aircraft. 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.