Abstract—In this paper, a new two stage vapor compression
refrigeration cycle is investigated. At this cycle, both the vapor
compression and expansion processes are done at two stages.
This system, designed to offer two cold temperatures in order to
store two categories of food, works with R134a as a refrigerant.
To enhance its performance, a heat exchanger and a flash
separator are integrated in this cycle. The aim of this study is to
find the optimal operating point corresponding to the best
performance by studying several design and operating
parameters. So that, a simulation program based on the first and
second laws of thermodynamics was developed and a coefficient
of performance of 3.5 was obtained.