A Theoretical Optimum Tilt Angle Model for Solar Collectors from Keplerian Orbit

Solar energy has been extensively used in industry and everyday life. A more suitable solar collector orientation can increase its utilization. Many studies have explored the best of installation from perspective data analysis local-area cases. Investigating optimal tilt angle a analysis, or guiding installation, requires an priori theoretical as support. However, none current taken real motion Sun into account. Furthermore, complete set angles for is necessary worldwide locations. Therefore, view astronomical mechanics, considering true orbit Sun, mathematical model that universal across globe proposed: Kepler constructed transformed local Earth coordinate system. After that, calculation solution given. Finally, several examples are shown to demonstrate variation with month latitude. The results show daily fixed collectors, altitude should be about 6° above noon summer lower winter. For annual slightly higher than In summary, this study demonstrates when location specified, calculate optimum collectors position.