Authors : Talib Z. Farge, Sahar R. Al-Sakini and Aseel A. Ismael
Abstract: In this research, the enhancement cooling of the electrical distribution transformer 250 kVA has been studied experimentally by using thermosyphon method. Ten thermosyphon were proposed to enhance the cooling performance to the electrical transformer. Thermosyphon was made from cooper tube with outer diameter of 22.3 mm and thickness of 0.8 mm with evaporator and condenser length were 23 and 35 cm, respectively. The angle of inclination of the thermosyphon condenser section was 45°. A 40 aluminum fins were installed on the outer surface of the thermosyphon condenser section. The working fluid used was the distilled water with filling ratio of 50%. The comparing result for the electrical transformer with and without thermosyphon at partial load. The percentage improvement in the transformer efficiency, transformer insulation life, oil temperature, primary winding temperature secondary winding temperature and the oil heat power and primary and secondary resistance were 0.15, 82.7, 2.98, 4.376, 5.78 , 4.7, 34.9 and 41.2%, respectively. The enhancement percentage of heat transfer coefficient for high voltage top and below are 8, 6.66%, respectively and low voltage top and below are 10, 10.15, respectively and transformer tank top below and fin are 1.4, 2.9 and 1.49%, respectively.
Talib Z. Farge, Sahar R. Al-Sakini and Aseel A. Ismael, 2019. Enhancement Cooling System of Three-Phase Distribution Transformer (250 kVA) by using Thermosyphon. Journal of Engineering and Applied Sciences, 14: 7620-7626.