EXPERIMENTAL INVESTIGATION TO ENHANCE HEAT TRANSFER CHARACTERISTICS OF VCR SYSTEM USING SiO2 NANO LUBRICANT WITH R600a AS WORKING FLUID
Keywords:
Coefficient of performance (COP), work of compression (WC), R600a, nanoparticles, thermo physical characteristics.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 investigated the effect of dispersing a low concentration of SiO2 nanoparticles in Polyoester oil and the effects of 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 Polyoester oil (POE).The physics involved in the interaction of nanoparticles with the base fluid has been elucidated. In the present work, SiO2 Nano powder (1% w/v), (2% w/v) and (3% 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 Polyolester oil lubricants when compared with normal cycle this is due to effective lubrication and thermo physical characteristics of nano lubricant.
