Study of Heat Dissipation on Oil-Immersed Power Transformers

• Main Authors: Ying-Fu Lin, 林盈甫
• Other Authors: Ruey-Yih Tsai
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/93710812640798548840

碩士 === 中原大學 === 機械工程研究所 === 98 === The main purpose of this research is to study the thermal dissipation by natural convection of oil-immersed transformer with flow channels. The 167kVA oil-immersed power transformer is installed inside the utility box. The only way to cool it down. Therefore, the flow channel is very important for thermal dissipation of transformer. Hence, this study from the thermal dissipation in different flow channels in order to understand the temperature distribution in the transformer. This article uses CFDRC to simulate the velocity field as well as the temperature field in different flow channel types. The numerical experiment herein is proceeded by taking flow channels of 2mm~5mm width, flow channels 3, 4, 5 pcs, heights of coils 300mm, 400mm, 500mm, and the external layer of the low voltage coil windings with different materials. The main discussion will be on temperatures of high and low voltage oil-immersed transformer and velocity of flow channel. Result shows increase of the width of flow channels and Increase of flow channels provides more cooling channels, and accelerate oil cycling. Heights of coils influence velocity of oil flow. However, materials change on the external layer of the low voltage coil windings does not make significant differences on thermal dissipation.