A dynamic model of a vapor compression refrigeration cycle using zeotropic refrigerant mixtures -1st report: a versatile model for zeotropic refrigerant mixtures

摘要

A dynamic model is developed for a vapor compression refrigeration cycle with zeotropic refrigerant mixtures. In this model, the refrigeration cycle is represented by elements, such as a compressor and heat exchangers and connecting points of each element. The continuity equation of pressure and the conservation equation of mass and energy at each connecting point are used as the equations of the refrigeration cycle. To solve the equations, inlet pressure, inlet mass flow rate or outlet pressure of each element, enthalpy and the circulating composition of each connecting point are modified. In this way, a versatile modeling of refrigeration cycles is realized. In addition, including conservation of mass of each composition of zeotropic refrigerant mixtures in this model, dynamic characteristics of compositions are calculated.