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目前在国外飞机上使用较多的环控系统是升压式高压除水空调系统(简称系统A),其优点是涡轮出口空气温度很低,进入座舱的空气干燥;缺点是系统流量及冲压空气流量大,制冷系统低,系统性能代偿损失大。 现在飞机空调系统的发展趋势是:(1)减少空调系统的代偿损失及成本。(2)利用燃油作为热交换器的冷源。(3)用液体来冷却电子设备。(4)增加系统引气温度和压力。为适应此趋势,国外逐步用高温动力涡轮驱动闭式空调系统(下文简称系统B)来代替系统A。 系统B是目前国外最先进的飞机空调系统。它用高温压缩空气驱动动力涡轮,以此来充分利用高温压缩空气的能量。高温动力涡轮冷却高温压缩空气,并驱动一套闭式升压式空
Currently used in more foreign aircraft control system is booster high pressure water removal air conditioning system (referred to as system A), the advantage of the turbine outlet air temperature is very low, into the cockpit of air dry; disadvantage is the system flow and ram air Large flow, low refrigeration system, compensation for system performance loss. Now the development trend of aircraft air conditioning system is: (1) reduce the loss of air conditioning system compensation and costs. (2) The use of fuel as a heat exchanger cold source. (3) Use liquid to cool electronic equipment. (4) increase the system bleed air temperature and pressure. In order to adapt to this trend, foreign countries gradually replace the system A with a high-temperature power turbine-driven closed air conditioning system (hereinafter referred to as system B). System B is currently the most advanced aircraft air-conditioning system. It uses high-temperature compressed air to drive the power turbine, in order to make full use of high-temperature compressed air energy. High-temperature power turbines cool compressed air at high temperatures and drive a closed boost void