Electro-Insulating Nanofluids Based on Synthetic Ester and TiO 2 or C 60 Nanoparticles in Power Transformer

The article discusses thermal properties of synthetic ester admixed with nanoparticles. The analyzed thermal properties were: thermal conductivity λ , kinematic viscosity υ , density ρ , specific heat c p , and the thermal expansion factor β - all obtained by means of measurements. On the basis of these, the authors calculated the heat transfer factor α , which determines the ability of the liquid to heat transport. The authors used nanoparticles of fullerene C 60 and titanium oxide TiO 2 . The analysis of the thermal properties was done for the temperatures of 25, 40, 60 and 80 °C. The authors analyzed the impact of nanoparticles C 60 and TiO 2 on thermal properties of synthetic ester. They proved that fullerene C 60 in principle had no influence on heat transfer factor α of the ester, while titanium oxide TiO 2 had some positive influence on the factor, the value of which increased about 1–3%.