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plea 01

Complex Windows Simulations

research studies

Study part of LBNL Research Project
Service Research
Field Daylighting Analysis
Institute LBNL, Lawrence Berkeley National Laboratory
Job Title Principal Research Associate
Related publication 

Nowadays, virtual models are commonly used to evaluate the performance of conventional window systems. Complex fenestration systems can be difficult to simulate accurately not only because of their geometry but also because of their optical properties that scatter light in an unpredictable manner. Bi-directional Scattering Distribution Functions (BSDF) have recently been developed based on a mixture of measurements and modelling to characterize the optics of such systems. This paper describes the workflow needed to create then use these BSDF datasets in the Radiance lighting simulation software. Limited comparisons are made between visualizations produced using the standard ray-tracing method, the BSDF method, and that taken in a full-scale outdoor mockup.

plea 02
02

01 – window system evaluation process diagram
02 – falsecolour luminance maps, venetian blinds: a: noBSDF b: BSDF c: difference noBSDF-BSDF d: HDR picture
03 – falsecolour luminance maps, mirrored blinds: a: BSDF b: difference noBSDF-BSDF c: noBSDF

plea 03
03

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