Compared the Thermal Properties of Re-Refined Oil and Virgin Oil of Electrical Transformer by Barium Titanate Nanopowder BaTiO3 Addition

Abstract

In this study, transformer oil is mixed with nanopowder semiconductor barium titanate (NSBT) to increase its thermal conductivity. For five percentages (0.01, 0.02, 0.03, 0.04, and 0.05%) wt% of virgin oil and re-refined oil, samples of thermal conductivity, flashpoint, specific heat, and thermal diffusivity were measured. However, 0.02 weight percent of oleic acid was added to 100 c of oil as a dispersant. It was re-refined oil's and virgin oil's density, kinematic viscosity, flashpoint, specific heat, and thermal diffusivity were increased by NSBT by up to 1.5 times. The addition improved the density and thermal diffusivity of the oil. The added nano particles lengthened the used oil's usable life and reduced the need for frequent maintenance. Additionally, Oleic acid should be added firmly to control the dispersing agent, but with caution. As a result, it is strongly urged to monitor the dispersion agent's addition carefully.