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Micro‐arc oxidation (MAO) is a surface treatment technology that enhances the surface properties of valves by creating a ceramic oxide layer on the metal surface. The goal of this study is to investigate the influence of current density on the properties of aluminum coatings during preparation and to improve the tribological properties of MAO/PTFE self‐lubricating films on the coating surface. The...
Decades of experience in underground substations indicated that the traditional cooling technologies have their own various shortcomings. Therefore, a novel evaporative cooling system was pointed out and will be applied in a power transformer of an urban substation. This new cooling technology could be considered as a two-step cooling system, which could transport heat energy effectively from underground...
Evaporative cooling transformer, using inflammable fluorocarbon liquid as insulation medium and coolant, is suitable for some special applications in utilities. However, the fluorocarbon liquid is so expensive that the evaporative cooling transformer must be developed economically with effective method to save the coolant cost. A preliminary study for exploring the configuration of evaporative cooling...
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