Abstract
In this paper, an experimental electrical distribution transformer was studied and a new technique was proposed to improve the performance of a new mixed cooling consisting of pure transformer oil, paraffin wax and nanoparticles. The experiment was carried out on a small transformer that was done by taking a model with dimensions (15 * 10 * 10) cm to facilitate calculations. Paraffin wax absorbs the heat generated in the transformer due to the smelting process that can be used to cool electrical appliances. Nanoparticles have good thermal properties and lead to increased oil insulation to thermal improvements in transformer oil with dispersal of solid nanoparticles and their effects on transformer cooling. Three types of solid nanoparticles were used in this experiment (Al2O3, TiO2, and Sic) with a different volume concentration (1%, 3%, and 5%) and 4% paraffin wax as a certified added percentage for each process. The obtained results showed that when mixing paraffin wax and solid nanoparticles with transformer oil, the transformer cooling performance is improved by reducing the temperature. The best selected nanoparticles were found to be Sic and the reason for this is that Sic has a higher thermal conductivity compared to (Al2O3 and TiO2). The proposed hybrid oil reduces the temperature by 10 ° C (in the case of PCM and Sic) and it is possible to improve the cooling performance of electrical transformers.
Highlights
The transformer is a constant electrical device that transmits electrical energy between two circuits
TiO2 nanofluid has been used in different concentrations, which in turn reduces the transformer temperature due to thermal conductivity, which leads to improved heat transfered process by enhancing the thermal conductivity of the oil by dispersing nanoparticles and the thermal conductivity with a rise in the TiO2 nanofluid volume portion
From this figure it can be observed that when using wax with Al2O3 nanofluid leads to a decrease in temperature which is due to this because paraffin wax has a high ability to store heat by absorbing it in the form of latent heat
Summary
The transformer is a constant electrical device that transmits electrical energy between two circuits. The transformer consists of three main components: the primary winding which functions as the input, the secondary winding which acts as the output, and the iron core which enhances the produced magnetic field. A different current in one coil produces a heterogeneous magnetic flux, which in turn leads to a variety of wattages across the second coil around the same core. COMSOL software was used to analyze numerically the dielectric changes and the resulting variable capacitance and dissipation parameters from moisture and temperature inputs. Their findings suggest a deeper understanding of modeling and study of OIP faults bushing.
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