the temperature of mixture refrigerant at the outlet of
subcooler is assumed to be the same as that at the outlet of condenser-II. In addition, it
is noted that in the following discussions, the basic operating conditions are given
as: 4t =40 °C, 6t =-28 °C, 4,5 Dt = 25°C and 4',5' Dt = 25°C.
3.1. Effects of components ratio of zeotropic mixtures on