Method for Evaluating the Annual Effectiveness of Fixed, Exterior Shading Devices

Abstract

This study is concerned with developing a �method that evaluates the annual effectiveness of fixed, exterior shading devices. The method quantitatively measures the effectiveness of a device to shade during overheated months and to allow insolation during underheated months, and thus facilitates the selection and sizing of fixed, exterior shading devices. In developing the method, a procedural synopsLs LS presented of assessing shading needs and selecting and sizing shading devices. Existing latitude-based and climate-based methods for determining recommended projection lengths are analyzed to see how (and whether) the methods address the problems of balancing summer shading with winter insolation and late summer shading with spring insolation.