机载综合环控系统的热管理

Using fuel as the main heat sink, and introducing liquid PAO and R134a as auxiliary heat sink, a new scheme for thermal management of environmental control system was proposed. The air compression refrigeration subsystem and the high-temperature PAO subsystem use air-PAO heat exchanger as the connection point and are coupled into the thermal management subsystem of cockpit and electronic cabin 1. The cryogenic PAO subsystem and the evaporator compression refrigeration cycle are coupled to the thermal management subsystem of the electronic compartment 2. The simulation models of main components such as air-liquid heat exchanger and liquid-liquid evaporator/condenser are established by combining mathematical calculation with computer modeling and simulation. The results show that under certain air inlet temperature and pressure conditions, fuel as the main heat sink can absorb a lot of heat, and the complementary heat of each subsystem can meet the temperature control of the cockpit and the electronic cabin, to ensure its stable and efficient operation.