Bi-directional transmission properties of Venetian blinds: experimental assessment compared to ray-tracing calculations
نویسندگان
چکیده
منابع مشابه
Bi-directional Light Transmission Properties Assessment for Venetian Blinds: Computer Simulations Compared to Photogoniometer Measurements
An accurate evaluation of daylight distribution through advanced fenestration systems (complex glazing, solar shading systems) requires the knowledge of their Bi-directional light Transmission Distribution Function (BTDF). An innovative equipment for the experimental assessment of these bi-directional functions has been developed, based on a digital imaging detection system. An extensive set of...
متن کاملComparison between ray-tracing simulations and bi- directional transmission measurements on prismatic glazing
Evaluation of solar heat gain and daylight distribution through complex window and shading systems requires the determination of the Bi-directional Transmission Distribution Function (BTDF). Measurement of BTDF can be time-consuming, and inaccuracies are likely because of physical constraints and experimental adjustments. A general calculation methodology, based on more easily measurable compon...
متن کاملExperimental validation of simulation methods for bi-directional transmission properties at the daylighting performance level
The objective of this paper is to assess the capability of existing lighting simulation methods to predict the performance of complex fenestration systems (CFS), whose potential in daylight and sunlight control make them an increasingly popular alternative to conventional glazing. The research was conducted in two phases. First, collect reliable reference data by taking illuminance measurements...
متن کاملExperimental assessment of bi-directional transmission distribution functions using digital imaging techniques
Most energy-saving applications of advanced fenestration systems, e.g. solar blinds, novel types of glazing and daylight redirecting devices, require a precise knowledge of their directional light transmission features. These photometric properties are described by a Bi-directional Transmission Distribution Function (BTDF), which is experimentally assessed by a bi-directional photogoniometer. A...
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Phase-contrast x-ray imaging is a promising improvement of conventional absorption-based mammography for early tumor detection. This potential has been demonstrated recently, utilizing structured gratings to obtain differential phase and dark-field scattering images. However, the inherently anisotropic imaging sensitivity of the proposed mono-directional approach yields only insufficient diagno...
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ژورنال
عنوان ژورنال: Solar Energy
سال: 2005
ISSN: 0038-092X
DOI: 10.1016/j.solener.2004.06.005