期刊名称：International Journal of Energy and Environment
印刷版ISSN：2076-2895
电子版ISSN：2076-2909
出版年度：2017
卷号：8
期号：3
页码：229-238
出版社：International Energy and Environment Foundation (IEEF)
摘要：Thermal behavior of electrical distribution transformer has been numerically studied with the effect of surrounding air temperature. 250 KVA distribution transformer is chosen as a study model and studied in temperature range cover the weather conditions of hot places. Transformer oil-based nanofluids were used as a cooling medium instead of pure transformer oil. Four types of solid particles (Cu, Al2O3, TiO2 and SiC) were used to compose nanofluids with volume fractions (1%, 3%, 5%, 7%, and 9%). In addition to its good thermal characteristics the nanoparticles lead also to increase the dielectric of oil and increase the breakdown voltage. Results obtained show that, using of transformer oil-based nanofluids as a cooling medium instead of pure transformer oil lead to improve the cooling performance of transformer by reducing the temperature of transformer and as a consequence increasing the protection of the transformer against the breakdown. Also increasing the nanoparticles volume fraction in nanofluid cause extra decrease in transformer temperature. Among all of the selected nanofluids the SiC-Oil nanofluid give lower transformer temperature.
