A comparison between calculated and measured SHGC for complex fenestration systems

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Description

Calorimetric measurements of dynamic net heat flow through a complex fenestration system consisting of a buff venetian blind inside clear double glazing are used to derive the direction-dependent beam SHGC (solar heat gain coefficient) of the fenestration. The data are compared with calculations according to a proposed general method for deriving complex fenestration system SHGC`s from bidirectional layer optical properties and generic calorimetric properties. Previously published optical data for the same venetian blind and generic inward-flowing fraction measurements are used in the calculation. Satisfactory agreement is found between SHGC measurements and calculation. Significant dependence on incident angle was found in ... continued below

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15 p.

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Klems, J. H.; Warner, J. L. & Kelley, G. O. September 1995.

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Description

Calorimetric measurements of dynamic net heat flow through a complex fenestration system consisting of a buff venetian blind inside clear double glazing are used to derive the direction-dependent beam SHGC (solar heat gain coefficient) of the fenestration. The data are compared with calculations according to a proposed general method for deriving complex fenestration system SHGC`s from bidirectional layer optical properties and generic calorimetric properties. Previously published optical data for the same venetian blind and generic inward-flowing fraction measurements are used in the calculation. Satisfactory agreement is found between SHGC measurements and calculation. Significant dependence on incident angle was found in the measured SHGC`s. Profile angle was not found to be a useful variable in characterizing the system performance. Predicted SHGC was found to be inherently dependent on two angles, although only the incident angle variations were observable under test conditions.

Physical Description

15 p.

Notes

OSTI as DE96008575

Source

  • Winter meeting of American Society of Heating, Refrigeration and Air Conditioning Engineers, Atlanta, GA (United States), 17-21 Feb 1996

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  • Other: DE96008575
  • Report No.: LBL--37037
  • Report No.: Mo--345;CONF-960254--3
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 213886
  • Archival Resource Key: ark:/67531/metadc668765

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  • September 1995

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  • June 29, 2015, 9:42 p.m.

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  • Nov. 19, 2015, 4:17 p.m.

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Klems, J. H.; Warner, J. L. & Kelley, G. O. A comparison between calculated and measured SHGC for complex fenestration systems, article, September 1995; California. (digital.library.unt.edu/ark:/67531/metadc668765/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.