Estimation of Thermal and Rheological Properties of Nano Lubricants

Abstract

Additives derived from a wide variety of materials, each with its unique nanostructure, are employed to enhance the performance characteristics of lubricants today. To reduce friction coefficients and wear rates, several studies have focused on improving lubricants' thermal physical characteristics. Adding components to the basic lubricant is one method for modifying its performance. Nanoparticles, due to their unique size, shape, and other qualities, have recently gained popularity as a novel kind of additive. When nanoparticles, a dispersant, and a base lubricant are combined, the resulting compound is called a nano lubricant, a novel kind of engineering refrigerant. The purpose of this thesis is to enhance the nano lubricants thermal characteristics for use in refrigeration. Compressor lubrication guidelines for refrigeration compressors will also be included in the thesis. Nanoparticles of magnesium oxide were employed to create a lubricant with improved thermophysical properties and lubricating qualities in this research. Polyester oil served as the basic lubricant, with 40 nm nanoparticles added at varying amounts for this study. Nano lubricants comprising 0.25, 0.5, 0.75, and 1 percent nanoparticles were prepared using a magnetic stirrer and sonicator, which facilitated the dispersion technique. The viscosity, density, thermal conductivity, and frictional coefficient of nano lubricants were studied.