| abstract |
Methods, apparatus, and systems relating to the use and design of specially shaped, rotating reflective louvers to provide cost effectively harvesting of electricity, heat, and/or lighting are described. In an embodiment, the reflected and concentrated direct light is focused on the neighboring louver photovoltaic cells to generate electricity and an integral cooling channel allows heat collection. A skylight embodiment permits the indirect light to pass between the louvers and through a transparent backing providing high quality natural light inside while allowing artificial lights to be dimmed or turned off saving energy. In some embodiments, control systems (that may be computer controlled) can modulate the louver position to improve the light transmitted into the building when appropriate to maximize the net energy saved or generated depending on the situation. Moreover, the devices can be retrofitted into existing buildings or integrated into new building construction. Other embodiments are also disclosed. |