|Title||Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional Scattering Distribution Functions within Radiance|
|Publication Type||Journal Article|
|Year of Publication||2011|
|Authors||Gregory J Ward, Richard G Mistrick, Eleanor S Lee, Andrew McNeil, Jacob C Jonsson|
|Journal||Leukos, The Journal of the Illuminating Engineering Society|
|Keywords||bidirectional scattering distribution function (BSDF), Complex fenestration systems, daylighting systems, energy, Radiance software, Shading Systems, windows|
We describe two methods which rely on bidirectional scattering distribution functions (BSDFs) to model the daylighting performance of complex fenestration systems (CFS), enabling greater flexibility and accuracy in evaluating arbitrary assemblies of glazing, shading, and other optically-complex coplanar window systems. Two tools within Radiance enable a) efficient annual performance evaluations of CFS, and b) accurate renderings of CFS despite the loss of spatial resolution associated with low-resolution BSDF datasets for inhomogeneous systems. Validation, accuracy, and limitations of the methods are discussed.
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