Performance analysis of air conditioning system for the aircraft

摘要

The air conditioning systems installed in aircraft generally employ an air cycle method for refrigeration, instead of a vapor cycle method utilized in most of the air conditioning systems of vehicles, houses, and buildings. An air cycle system employs air as the working fluid, while a vapor cycle system utilizes some condensable fluid, e.g. Freon, which is a chemical compound easily convertible from gaseous state to liquid state, and vice versa, and is capable of conducting thermal energy from a hot region to a cold region. This paper describes the operation principle and design philosophy of the air cycle system. The Chapter II outlines the fundamentals of the air cycle system and introduces the typical construction of the system, now practically used in aircraft. The Chapter III and IV present a description of the design procedure and the method of performance analysis developed by us. The Chapter V gives a simple summary of the recent trends of this technology used in environmental control systems for aircraft.