• B.REDDY PRASAD
• Dr.K. KALYANI RADHA

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 investigates the effect of dispersing a low concentration of Al2O3 nanoparticles in the mineral oil based and 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. An enhancement in the COP of the refrigeration system has been observed, with low concentrations of nanoparticles suspended in the mineral oil and Polyoester oil (POE).The physics involved in the interaction of nanoparticles with the base fluid has been elucidated. In the present work, Al2O3 (Alumina) Nano powder (1% W/V) was mixed with Polyolester (POE) oil and Mineral oil separately. Experiments are done with R600a as refrigerant and it was found that power consumption was decreasing with Polyolester oil and Mineral lubrication oils when compared with normal cycle this is due to effective lubrication and thermo physical characteristics of nano lubricant.

Coefficient of performance (COP), work of compression (WC), R600a, nanoparticles, thermo physical characteristics, Al2O3

"EXPERIMENTAL INVESTIGATION TO ENHANCE HEAT TRANSFER OF VCR SYSTEM USING Al2O3 NANO LUBRICANT WITH R600a AS WORKING FLUID", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 6, page no.637-642, June-2018, Available :http://www.jetir.org/papers/JETIR1806781.pdf

"EXPERIMENTAL INVESTIGATION TO ENHANCE HEAT TRANSFER OF VCR SYSTEM USING Al2O3 NANO LUBRICANT WITH R600a AS WORKING FLUID", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 6, page no. pp637-642, June-2018, Available at : http://www.jetir.org/papers/JETIR1806781.pdf