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

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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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Ward, Gregory; Mistrick, Ph.D., Richard; Lee, Eleanor; McNeil, Andrew & Jonsson, Ph.D., Jacob January 21, 2011.

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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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  • Journal Name: Leukos, Journal of the Illuminating Engineering Society of North America

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  • Report No.: LBNL-4414E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 1012245
  • Archival Resource Key: ark:/67531/metadc833429

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  • January 21, 2011

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • July 5, 2016, 1:44 p.m.

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Ward, Gregory; Mistrick, Ph.D., Richard; Lee, Eleanor; McNeil, Andrew & Jonsson, Ph.D., Jacob. Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional Scattering Distribution Functions within Radiance, article, January 21, 2011; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc833429/: accessed June 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.