TY  - JOUR
T1  - Enhancement Cooling System of Three-Phase Distribution
Transformer (250 kVA) by using Thermosyphon
AU - A. Ismael, Aseel AU - Al-Sakini, Sahar R. AU - Farge, Talib Z. 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 20
SP  - 7620
EP  - 7626
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.7620.7626
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.7620.7626
KW  - heat transfer coefficient
KW  -oil temperature
KW  -primary temperature (HV)
KW  -per unit life of insulation
KW  -efficiency
KW  -electrical transformercooling
KW  -Inclination thermosyphon
KW  -secondary temperature (LV)
KW  -primary and secondary resistance
KW  -heat of oil (W)
AB  - 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.
ER  -