Environmental control system (ECS) is used in the aircraft industry to define the systems and equipment associated with ventilation, heating, cooling, humidity/contamination control, and pressurization in the occupied compartments, cargo compartments, and electronic equipment bays. ECS controls the air-conditioning system, consists of an air cycle machine (ACM), and several heat exchangers, depending on the design and control valves. The component of an aircraft needs energy, and it is obtained by the aircraft fuel. Since the fuel is the limited and only source of power, consequently, to make flight operation more efficient with lesser cost, it is necessary to examine the efficiencies of components during the changing operating conditions. This chapter presents an overview of the corresponding system, the thermodynamic analysis of the air refrigeration cycle, the exergy analysis of the system for various flight operations, the analysis results by exergetic efficiency, and the exergy destruction on the component level, along with the exergetic improvement potential for every single component. The results showed that preheating heat exchanger and the main heat exchanger have the highest exergy destruction ratio and exergy improvement potential for different flight conditions. Therefore, improvements in heat exchanger design and optimization studies are among the issues that should be focused on to increase ECS performance.
Exergy Analysis of an Air Cycle Machine for Different Flight Conditions
Sustainable aviat.
2022-01-20
30 pages
Article/Chapter (Book)
Electronic Resource
English
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