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This paper presents a detailed theoretical analysis of regenerative vapour compression refrigeration cycle with ejector as second stage of compression. The basic purpose of using ejector, is to utilize the regenerative use of potential energy of ejector two phase expansion flow which would otherwise be lost in expansion valve. First stage of compression is achieved by compressor, in which only vapour compresses to 50-60% of the final pressure, while second stage of compression is achieved by a jet device (ejector) using internal potential energy of the working fluid flow. By this arrangement work input to compressor is reduced significantly, resulting an increase in COP of the system as compared to traditional cycle. A mathematical computational model is developed in the equation window of engineering equation solver(EES) for calculating different parameters such as, compressor work, work of pump, refrigerating capacity and COP of the new regenerative cycle using new generation refrigerant HFO-1234yf as compared to R-134a.

Theoretical Analysis of New Regenerative Vapour Compression System Using Ejector as Second Stage of Compressio