(0211) Effect of Fan Arrangement and Air Flow Direction on Thermal Performance of Radiators in a Power Transformer

摘要

Focus of the present numerical work is to study the effect of fan air flow direction and mounting arrangement on thermal performance of the radiators of power transformers using Computational Fluid Dynamics analysis. The study is carried out for four radiators and two fans in vertical and horizontal air flow directions. The horizontal flow from the two fans are considered in same and opposite direction, with the fans located in the same and opposite side, respectively. Thermal radiation is modelled using discrete transfer radiation model. Comparison of different flow and heat transfer patterns as well as heat dissipation – for the four different configurations - is presented. Velocity and temperature contours are used to visualize the heat and fluid flow distribution over the radiators. Fans placed on one side of the radiators as compared to other studied arrangements results in larger heat dissipation. Reasons for the improvement in the heat dissipation are presented.