Modeling of airplane ECS and parameter optimization for heat exchanger

Mathematical models for the main components of the airplane air-cycle system and MATLAB simulation modules were constructed. The air-cycle system was built including these component models and the performance of this system was researched. The predicting result agreed with the experimental one. This system was researched as the object, and decreasing exit temperature of the system as the object function. Then heat exchanger parameters-the flow number and flow length in the hot side were optimized as viewed from a system. The result showed that there were partly optimized resolve about these two parameters, depending on the input. And optimized relationship of heat, pressure and energy among the compressor, turbine and heat exchanger existed. The conclusion is significant as the reference to the ascertainment and optimization of the system parameters.