Light-scattering properties of a woven shade-screen material used for daylighting and solar heat-gain control
Title | Light-scattering properties of a woven shade-screen material used for daylighting and solar heat-gain control |
Publication Type | Conference Paper |
Year of Publication | 2008 |
Authors | Jacob C Jonsson, Eleanor S Lee, Michael D Rubin |
Conference Name | SPIE Optics+Photonics |
Date Published | 08/2008 |
Conference Location | San Diego, CA |
Call Number | LBNL-828E |
Abstract | 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. |
LBNL Report Number | LBNL-828E |