To improve the fan's efficiency, the students could start by using a more efficient motor. High-efficiency motors have lower energy consumption and can convert a higher percentage of input energy into useful work. Secondly, optimizing the design of the fan blades can enhance its efficiency. Utilizing aerodynamic principles such as reducing blade drag and increasing blade pitch can improve the fan's performance. Lastly, the students could also consider reducing friction in the fan's moving parts by using ball bearings or lubricants to minimize energy losses due to friction.
