In this paper, the geometrical parameters of two heat exchangers in a typical commercial aircraft’s ECS system are designed using the Entropy Generation Minimization (EGM) design technique. The irreversibilities of all the thermodynamic devices in the system are incorporated in the numerical analysis to minimize the exergy destruction of the system. The ECS analysed was based on a bootstrap air cycle with two cooling streams; ram air and air bled from engine fan. The paper proposes optimum air conditions at each device in the system. Trends of varying numerous system parameters against entropy generation number are also investigated to provide the design direction.
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.