Pengaruh Penambahan Nanopartikel TiO2 dan Surfaktan Nonyl Phenol 6 dengan Variasi Suhu pada Isolasi Minyak Mineral

Abstract

This research examines the effect of adding TiO2 nanoparticles and Nonyl Phenol 6 surfactant to various types and conditions of transformer oil. The research results indicate that the addition of nanoparticles can increase the dielectric strength and resistivity of the insulation oil, although these values decrease with increasing temperature. Adding a surfactant to the nanofluid can prevent oil clumping caused by the addition of nanoparticles, ensuring even distribution in the oil. The viscosity increases with the addition of nanoparticles, but decreases when surfactant is added, resulting in slightly thinner oil. The research results show that adding TiO2 and nonyl phenol 6 surfactant to new Shell Diala B and Nynas oils in samples S5 and S10 at a temperature of 90℃ can increase their dielectric strength to 363.024 kV/cm and 356.352 kV/cm, respectively, with an increase of 14.31% and 18.07%. Meanwhile, for used Shell Diala B, Esso, and Gulf oils in samples S15, S20, and S25 at a temperature of 90℃, the dielectric strength is 287.872 kV/cm, 235.76 kV/cm, and 277.656 kV/cm, respectively, with a percentage increase of 32.56%, 31.62%, and 33.46%. The highest resistivity for new Shell Diala B and Nynas oils is found in samples S5 and S8, with values of 51.8 GΩm and 38.9 GΩm at a temperature of 20℃, representing an increase of 33.33% and 24.85%. For used Shell Diala B, Esso, and Gulf oils in samples S15, S20, and S25, the resistivity is 15.525 GΩm, 1.507 GΩm, and 8.625 GΩm at a temperature of 20℃, with an increase of 60.00%, 16.55%, and 33.34%, respectively. The viscosity at standard temperature, which is 40℃, is the lowest at 1.985 cSt in sample S5, and for used mineral oil in sample S25, it is 2.610 cSt.