This project involved two major phases of testing. For phase 1, four solar panels were used, each producing 6 volts, at 36.47 mW, used with 1000 ohm resistors at ½ watt. Of the four solar panels measuring 9.5 X 6.4 cm, one was used as a control, one was placed in a bowl reflector, one was placed in a two sided reflector, and one was placed in a mirror box reflector. These four panels were tested at positions facing east, then south, then sunward throughout the day on three different days. For phase 2, a channel reflector was designed to take advantage of the best results from phase 1 testing. A control panel and the channel reflector were faced south and tested at angles of 0, 15, 30, and 45 degrees. Efficiency factors were then calculated using the formula Power = Volts^2/Resistance.
All of the reflector designs performed better than the control in terms of power output, especially in cloudy weather or shade. The channel reflector outperformed the control panel in power output and efficiency at all times of the day. The glass reflectors for phase 2 added less than 1% to the cost of the panel, but boosted efficiency per square meter by an average of 11.97%, but sometimes by as much as 122.86% during the early morning or during cloudy weather.
After two phases of testing, I discovered that the best design was the channel reflector set due south at a 30 to 45 degree angle. This reflector design is simple, inexpensive, easy to build, and easy to maintain. This design could revolutionize the use of solar energy in America by improving efficiency and greatly reducing production costs, allowing solar power installations to pay for themselves in about 10 years instead of the typical 20 years they now take.
This project explores various reflector designs at different angles to see which combination best boosts the efficiency and cost effectiveness of solar cells.
Science Fair Project done By Dante G. Kari