SUPER-SUBCOOLING WITH R12 AND R22 REFRIGERATION PLANTS USING RECIPROCATING-COMPRESSORS

It is well known that subcooling can improve the efficiency of refrige ration plants. This paper proposes a new cycle. An auxiliary circuit i s added to the common single-compression refrigeration cycle. A part o f the refrigerant evaporates and so supercools liquid freon. The coeff icient of performance (COP) and flow-rate ratio for the new cycle are analysed and predicted with an IBM PC as the evaporating temperature i n the subcooler (TIS) varies. Two refrigerants (R12, R22) are employed The results show that the COPs of the new cycle increase by 5 to 11% compared with those of the common cycle. The TIS has an optimum where the COP is a maximum. An equation for calculating the optimal TIS is p roposed. The paper further discusses how the new cycle behaves under d ifferent circumstances. It is evident that the new cycle is feasible, and energy savings can be achieved.