|Title||Light-scattering properties of a woven shade-screen material used for daylighting and solar heat-gain control|
|Publication Type||Conference Paper|
|LBNL Report Number||LBNL-828E|
|Year of Publication||2008|
|Authors||Jonsson, Jacob C., Eleanor S. Lee, and Michael D. Rubin|
|Conference Name||SPIE Optics+Photonics|
|Conference Location||San Diego, CA|
Shade-screens are widely used in commercial buildings as a way to limit the amount of direct sunlight that can disturb people in the building. The shade screens also reduce the solar heat-gain through glazing the system. Modern energy and daylighting analysis software such as EnergyPlus and Radiance require complete scattering properties of the scattering materials in the system.
In this paper a shade screen used in the LBNL daylighting testbed is characterized using a photogoniometer and a normal angle of incidence integrating sphere. The data is used to create a complete bi-directional scattering distribution function (BDSF) that used in simulation programs.
The resulting BDSF is compared to a model's BDSF, both directly and by calculating the solar heat-gain coefficient for a dual-pane system using Window 6.