This study proposed a PV blind-integrated daylight responsive dimming system using LED lighting. It integrated a PV blind system with a daylight responsive dimming system, which can generate electricity and save electrical lighting energy at the same time. In addition, using LED lighting resulted in more efficient dimming performance compared to conventional fluorescent lighting. To maximize the amount of power generation and saving, the PV blind slat angle should be controlled according to the profile angle of the sun. However, blind slat angle control has an impact on both electricity generation and electrical lighting energy saving in the opposite way. To evaluate the impact of PV blind slat angle control on electricity generation and energy savings, this study conducted experiments throughout the year to identify the amount of electricity generation of the PV blind systems and the amount of electrical lighting energy savings of the LED lighting dimming systems by implementing the slat angle of blinds control, which could be compared to the case of a fixed slat angle PV blind system.
In this study, power generation in the reference room was about 68% compared to those in the test room, while electrical lighting energy savings in the test room was about 65% compared to those in the reference room. That is, controlling the PV blind slat angle orthogonally to the profile angle made for 32% more power generation and for 35% less energy savings. Again, such percentage values were measured from this particular case. The absolute power generation and savings can be different according to the efficiency of the PV modules used and weather conditions. This study revealed a trend in power generation and savings with controlling the PV blind slat angle.