SIMPLIFIED DAYLIGHTING DESIGN METHODOLOGY FOR CLEAR SKIES.

An overview of the state-of-the-art of daylighting research is presented. With this information on hand, a simplified daylighting design methodology is described for calculating illumination at any point within a room under clear sky conditions. The clear sky luminance distribution function used is consistent with the function presently being considered by C. I. E. Technical Committee TC-4. 2. The calculation procedures used separate the light reaching the point being considered into three separate paths, light directly from the sky, light after reflection from external and internal surfaces. Graphs and tables are developed for these three components in order to evolve calculation procedures which are simple to apply rather than lengthy direct computation from first principles. An example problem is presented to demonstrate the appropriateness of this daylighting design methodology to the passive solar design process.