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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. Each ACM and its components are often referred as an air conditioning pack.
In aeronautics, an environmental control system (ECS) of an aircraft is an essential component which provides air supply, thermal control and cabin pressurization for the crew and passengers. Additional functions include the cooling of avionics , smoke detection , and fire suppression .
The part of the bleed air that is directed to the ECS is then expanded to bring it to cabin pressure, which cools it. A final, suitable temperature is then achieved by adding back heat from the hot compressed air via a heat exchanger and air cycle machine known as a PAC (Pressurization and Air Conditioning) system. In some larger airliners, hot ...
In civil aircraft, bleed air's primary use is to provide pressure for the aircraft cabin by supplying air to the environmental control system. Additionally, bleed air is used to keep critical parts of the plane (such as the wing leading edges) ice-free. [6] Bleed air is used on many aircraft systems because it is easily available, reliable, and ...
The company's first major product was an oil cooler for military aircraft. Garrett designed and produced oil coolers for the Douglas DB-7. [9] Boeing's B-17 bombers, credited with substantially tipping the air war in America's and Great Britain's favor over Europe and the Pacific, were outfitted with Garrett intercoolers, as was the B-25. [12]
Honeywell provided the air conditioning system for America's first nuclear-powered submarine in 1954 and many Honeywell controls were used in the Manhattan Project. [16] John Clifford "Cliff" Garrett founded Aircraft Tool and Supply Company in a one-room office in Los Angeles in 1936 [17] to create specialized parts for aviation. [8]
Aerospace and Transportation Systems: Founded: 1960; 64 years ago () Headquarters: Toulouse: Products: In the aerospace sector: flight control systems, landing gears, integrated air management systems, bleed air systems, wing anti ice etc. In the transportation sector: air conditioning systems, actuation and power supply systems for all kind of ...
All modern air conditioning systems, even small window package units, are equipped with internal air filters. [citation needed] These are generally of a lightweight gauze-like material, and must be replaced or washed as conditions warrant. For example, a building in a high dust environment, or a home with furry pets, will need to have the ...