Operation Optimization for Cooling System of Large Aircraft

The cooling system of the large aircraft often adopts air cycle refrigeration system that uses the air as the refrigerant and supply fresh air at the same time. This paper proposed the operation optimization method for the cooling system of large aircraft to ensure the working performance of the system, which could guarantee the system operation reliability and reduce the aircraft performance compensatory loss. The dynamic simulation system was established to analyze the dynamic performance of the aircraft cooling system at first. Then its control method and system operation were optimized carefully. The system level optimization was conducted with the logic and parameter matching for the flow control valve, the ram air regulation valve and the temperature control valve. In addition, the flow control system was also optimized by steplessly regulating the engine bleed air and providing the reasonable control logic. The proposed optimization method could reduce the engine compensation loss on the premise of meeting the demand of aircraft refrigeration system.