PERFORMANCE ANALYSIS OF A VCR SYSTEM USING R600A DOPED WITH NANO – LUBRICANTS

Abstract

The coefficient of performance (COP) of a refrigeration system can be improved if a reduction in the work of compression (WC) can be achieved by a suitable technique, for a specified heat removal rate. The present study is to be investigated on the effect of dispersing a low concentration of AL2O3 & TiO2 hybrid nano particles in Polyolester (POE) oil as base fluid and the effects of hybrid nano lubricant, on its viscosity and lubrication characteristics, as well as on the overall performance of a Vapor Compression Refrigeration System using R600a (Isobutane) as the working fluid were noticed. An enhancement in the COP of the refrigeration system has been observed, with low concentrations of nanoparticles suspended in Polyolesteroil (POE). In the present work, AL2O3 & TiO2 Nano powder (0.5% w/v), (0.75% w/v) and (1% w/v) was mixed with Polyolester (POE) oil. Experiments are done with R600a as refrigerant and it was found that power consumption was decreasing with Polyoester oil lubricants when compared with normal cycle this is due to effective lubrication and thermophysical characteristics of nano lubricant