Environmental control system, Aerospace engineering, Air cycle machine

First and foremost, air-conditioning and air-pressurization vary in accordance with the compressor stage at the moment. In this respect different climate factors impact the way the bleed air comes in the aircraft during the flight. In this respect the design for usability is taken to make out the functional specificity of all control subsystems in the airframe. That is to say, the relationship between operational requirements maintenance concept, functional analysis and requirements allocation as well as environmental considerations (economical, ecological, political, societal, and technological) points out the full life cycle of the aircraft in its vital control systems (Blanchard Fabrycky, 2011). Thus, the stage of design and manufacture of ECS sparks interest first.