| Title |
Solar Tracking Performance using a Heliostat and Uniform Irradiation of LED Light for a Plant Factory |
| Authors |
구경완(Koo, Kyung-Wan) ; 김태진(Kim, Tae-Jin) ; 김영식(Kim, Youngshik) ; 유봉조(Ryu, Bong-Jo) |
| DOI |
https://doi.org/10.5370/KIEE.2015.64.12.1761 |
| Keywords |
Solar tracking performance ; Heliostat ; Plant factory ; Light reduction rate ; Uniform light irradiation of LED |
| Abstract |
This paper deals with the solar tracking performance using a small heliostat, the light reduction rate of the sun light, and the performance of uniform irradiation of LED light for a plant factory. A high precision encoder is attached to the heliostat to improve tracking accuracy. As a result, our heliostat-based solar tracking systems track efficiently the movement of the sun light in experimental tests. The reduction rate of the sun light in the plant factory is then measured by using an illumination sensor. The average reduction rate is 4.29%, which represents lower light reduction rates. In uniform irradiation tests of LED light, sixteen points are measured, and overall deviations of irradiation were within eight percents. |