2. Scare birds to avoid nesting. There may be some conductive substances in the nesting materials collected by birds, such as iron wires, which will cause short circuits between lines or towers (ground) when they fall on high-voltage lines. If you carefully look at the strong reflection on one side of the small windmill when it rotates, it will have a better bird repellent effect. If it is cooling, it will not be windless when it is most needed, and it will be windy when it can be cooled naturally. How can there be such a stupid design? So it's definitely not for heat dissipation.