Research on autocascade refrigeration system

Autocascade refrigeration system is a refrigeration system using mixed refrigerant. The system uses one compressor and achieves cascade between high boiling point component and low boiling point component by auto-segregate and multilevel cascade. So it can achieve lower temperature. Detailed introduction of the theory of autocascade refrigeration system is given in the paper. The compare among autocascade circle, single stage compress circle, double stage compress circle and cascade circle is given in the paper. The advantage of autocascade circle is pointed. The optimization principle of autocascade refrigeration system is given in the paper. The result of autocadcade circle using CFC refrigerant is contrast to the result of the double stage circle and the cascade circle. The autocascade refrigeration system using non-CFC refrigerant and autocascade refrigeration system applying to low temperature region are analysed. It shows that autocascade refrigeration system has preferable practical value.