Research developments of panel type radiators cooling oil-immersed power transformers based on energy-saving materials

When energy loss appears around cores and copper windings, cooling down the temperature timely has immense influence on transformer life and safe operation. In this paper, a serious of methods are proposed, which enhancing heat transfer of panel type radiators placed on the surface of the oil-immersed power transformers. When adding some turbulators on the panel type radiators and choosing the location of them appropriately, heat transfer effection can get a certain degree of improvement. Heat pipe is currently accepted efficient heat transfer element. Using the perfect heat transfer effect of heat pipe, with some necessary structural transformation, capacity of panel type radiator can be improved. New types of panel shape increase the effective heat transfer area, meanwhile damage the surface bounding layers. Therefore, optimization design with theory and simulation is a significant research field, by changing many kinds of structure parameters, for instance, the panel oil passage number and non uniform size distribution, inclination angle of up oil pipe and so on. Considering from actual condition, production process is simple, by using stainless steel, and owns a high level of automation, receiving lower energy consumption.