An Experimental Investigation of R12 and R134a Refrigerants in a Two - Phase Ejector Expansion Refrigeration

Refrigerators and Air conditioners play a key role in domestic as well as commercial purposes. These appliances that are used for the cooling purposes have become more of a necessity in today’s world. Yet most of the world can’t afford them due to their high power consumption, high initial cost, low performance etc. Investigation is under way worldwide on the performance of the refrigeration system while reducing its compressor work. The primary objective of this paper is to improve the performance of a refrigeration system by installing an ejector as valve for expansion thereby improving the COP. The refrigerants used during our experiments are R12 and R134a, which are most commonly used in today’s refrigeration methods. It is observed that with the use of ejector as an expander, the system exhibited a COP improvement of 22.7% and 13.59% than that of conventional systems with the refrigerants R12 and R134a respectively.