In order to preserve the life time of oil
transformers and to improve their performance, the
transformer oil must play its role as insulating and
cooling medium efficiently. Nanotechnology is an
effective science used for improving the dielectric and
thermal properties of the transformer oil. In this paper,
barium titanate (BT) nanoparticles were mixed with the
neat insulating oil by 0.01 g/L and 0.02 g/L
concentration. Breakdown voltage and heat transfer
coefficient were measured to excogitate the transformer
oil dielectric and thermal properties, respectively. From
the obtained results, for 0.01 g/L sample, it is noticed
that BT enhances the thermal properties of the
transformer oil by about 28.3% but, the dielectric
properties were slightly increase by about 2%. The
increasing of the BT nanoparticles concentration to 0.02
g/L achieves unsatisfied results due to the agglomeration
and the sedimentation of BT particles into the oil.