Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional Scattering Distribution Functions within Radiance

Publication Type

Journal Article

Date Published

04/2011

LBNL Report Number

LBNL-4414E

Abstract

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.

Journal

Leukos, The Journal of the Illuminating Engineering Society

Volume

7

Year of Publication

2011

Issue

4
241

ISSN

1550-2724

Call Number

LBNL-4414E