Life cycle analysis of the environmental control systems (ECS) is a significant part of the aircraft functioning during flights. In this respect a particular analysis of ECS in terms of design and manufacture, installation on the aircraft, removal for repair at the depot level, and complete replacement from the manufacturer…
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Thus, the first steps in analysis touch upon the structure and determination of ECS for airframes. Then, it is vital to point out the focal meaning of operating systems and their use for the normal work of civilian airframes, such as Boeing 747 and Airbus A-380. All in all, to delve into the full life cycle analysis of ECS means to incorporate a constructive approach toward estimation of the full life cycle and its applicability as one of the most sign significant subsystems throughout an aircraft. 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. Martinez (2011) draws upon the relationship between ECS and environmental protection systems (EPS) so as to justify the need for an accurate installation of both systems. It is a substantial warrant of security and operational stability of the aircraft. Moreover, ECS design should comply with widely differing temperatures depending on the geographical and atmospheric variety of temperatures, pressures, humidity and the like. Thereupon, a ste of factors, such as kinetic and solar heating, avionics heat loads, airframe system heat loads, the need for cabin conditioning, are to be taken into account by manufacturers (Moir & Seabridge, 2008). It is a predominant to calculate air-cycle process inside the cabin and regarding to the outer factors mentioned above. Figure 1. Air flow inside an aircraft cabin. Recirculation system is, perhaps, one of the main parts of ECS as it is designed with filters having no bypass and controlling gases to low levels due to “high quantities of outside airflow per cubic volume of space” (Hunt, Reid, Space, & Tilton, 2009, p. 5). This is why when installing a specifically designed ECS, the recirculation filters and fans should be checked out precisely. However, on the level of 30,000 feet or more, the pressure factor should also be taken into consideration. It is all about the automatically set outflow valves used to maintain the desired cabin pressure (National Research Council (U.S.); Committee on Air Quality in Passenger Cabins of Commercial Aircraft, 2002). Thus, the life cycle cost depends on the way ECS was used and how it operated throughout the period of direct functioning. In this respect anti-ice system and the recirculation system are the main precursors for further worn-out state of ECS. The thing is that modern ECS re-circulates “up to half of the cabin air…and whilst the ECS fresh air is treated to remove ozone, the recycled cabin air is filtered for many unwanted contaminants, including: 1) micro-organisms; 2) dust; odors; VOC’s” (Seabridge & Morgan, 2010, p. 36). ECS differ in terms of their practical endurance and workability in different outer environments. Based on the example of aircraft Airbus A-380 with its double-deck widebody passenger airliner, the significance of air conditioning grows as the inner space is considered the largest in this huge aircraft. Called an air jumbo in aviation, this airliner has one of the most powerful ECS’
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