Analysis of China’s Daylighting Climate with P G D Diagram

In order to improve the deficiency of existing daylighting climate zones and investigate the characteristics of the typical daylighting climate zones, the ratio between direct light ,diffuse light , global illumiance and extraterrestrial horizontal illumiance were taken as parameters. On the basis of annual observation data of twelve typical light climates zone, daylighting climate of various regions was investigated by P G D diagram. This method could more intuitively and accurately reflect the characteristics of regions and be easier for comparing the difference between light parameters .Through analysis, the daylight distribution profile of twelve zones were obtained, with which it could be reference for daylighting design.