STUDY & REVIEW ON THE PERFORMANCE ANALYSIS OF VARIOUS EXPANSION DEVICES IN VAPOUR COMPRESSION REFRIGERATION SYSTEM

The present review is concerned with the study of the effect of different expansion devices with refrigerant R22, R12, R407C, and R744 on the vapour compression refrigeration system. This paper is concerned with an overview of the project, the fundamental physics underlying the operation of fixed and variable expansion devices which includes capillary tube, thermostatic expansion valve, constant expansion device, Multi ejector expansion, and summarizes results of the analyses performed to compare them. For conducting the experimental verification with different expansion devices and R22, R12, R407C, R744 as refrigerant small test rig is used by many researchers. The experimental analysis conducted by various researchers for small capacity refrigeration systems are selected to study the performance characteristics of capacity of cooling, power required by the compressor, refrigerant mass flow rate and the coefficient of performance (COP) of the vapour compression refrigeration system with respect to different expansion devices like thermostatic expansion valve, Constant expansion valve and capillary tube.