When you stop to consider the Self-Generator concept, it makes a great deal of sense that such a machine could easily be made more economical. Julia Zhu and Tab Chao developed a proposal for an extremely efficient ceiling fan that can actually make use of the energy stored from its own repetitive motion. As you switch off the ventilator, the dissipated kinetic energy can be recovered, stored, and converted into electricity. This can be used the next time you switch on the Self-Generator.
The two-blade design of the fan keeps the appliance streamlined and lightweight, and capable of spinning faster with less power required. Every time you use it, you're saving a significant amount of electricity, helping you achieve greener cooling on even the hottest days.