Performance Improvement of Vapour Compression Refrigeration System Using Diffuser

Abstract

A modified Vapour Compression Refrigeration (VCR) System using diffuser was built to study the increase in coefficient of performance (COP) of the system. R600a (Isobutane) was taken as the alternative ecofriendly refrigerant and a comparative analysis with R134a (Tetrafluoroethane) was done. The diffuser was added to increase the COP by reducing the compressor work. The analysis were done for various diffusers and time intervals. The results showed that the modified VCR system had an increase in COP between 5% - 28%. Further it reduced the compressor power input by 13% - 17%. R600a showed better performance in both normal and modified VCR system.