TY - JOUR T1 - Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional Scattering Distribution Functions within Radiance JF - Leukos, The Journal of the Illuminating Engineering Society Y1 - 2011/04// A1 - Gregory J. Ward A1 - Richard G. Mistrick A1 - Eleanor S. Lee A1 - Andrew McNeil A1 - Jacob C. Jonsson KW - bidirectional scattering distribution function (BSDF) KW - Complex fenestration systems KW - daylighting systems KW - energy KW - Radiance software KW - Shading Systems KW - windows AB - 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. VL - 7 IS - 4 U1 -

Windows and Daylighting Group

U2 - LBNL-4414E DO - 10.1080/15502724.2011.10732150 ER -