A SIMPLE CHART TO DESIGN SHADING DEVICES CONSIDERING THE WINDOW SOLAR ANGLE DEPENDENT PROPERTIES

Abstract – A simple chart useful to design shading devices is presented. The chart, which is complementary to existing solar path diagrams, provides additional information about the window’s solar angle dependent properties and its geometrical relationship to the sunbeam. This information allows to make meaningful hypotheses about the optimum geometry of the shading device. Two examples are provided where the chart is used to define the geometry of an awning on a south- and west-oriented office room in Stockholm. The examples show that the chart is useful to restrict the early design hypotheses and identify the optimum awning geometry at an early design stage. 1