INFLUENCE OF SOLAR REFLECTIVITY OF THE COATING OF TRANSFORMERS IN THEIR THERMAL PERFORMANCE
DOI:
https://doi.org/10.59627/cbens.2012.2310Keywords:
Distribution Transformers, Transformers Temperature, Transformers ColorsAbstract
The distribution transformers have high efficiency, but the small percentage of losses is the main responsible for their internally generated heat. The distribution transformers installed outdoors have their temperatures increased also due to absorption of solar radiation. To test different coatings it was mounted an experimental comparison assembly for determining the equivalent power losses of the transformer to keep the oil at a predetermined temperature. This study shows that the use of selective coating with high reflectance of solar radiation and good emittance can produce a significant reduction in the transformer oil temperature, allowing increasing its power output and extending its useful life.
Downloads
References
CEEE-D. Transformador de Distribuição, código ETD-00.001 - Especificação de Distribuição, Companhia Estadual de Energia Elétrica do Rio Grande do Sul, 2010.
Denver Office. Painting of Transformers and Circuit Breakers, Facilities Instructions, Standards, and Techniques, Volume 3-7, United States Department of the Interior, Bureau of Reclamation, 1991.
Lee, R. H. The Effect of Color on Temperature of Electrical Enclosures Subject to Solar Radiation, IEEE Transactions in Industry Applications, vol. 1A-11, pp 646-653, Nov., 1975.
Mak, J. Influência da Cor na Elevação na Temperatura nos Transformadores, publicação disponível em www.buenomak.com.br, acessado em 10/02/2012, 2012.
Montsinger e Wetherill. Transactions of the American Institute of Electrical Engineers, (49)1, pp 41-50, 1930.
