Detailed Glass
This material type should be the preferred one for defining glass panes. “Outside” values represent the side of the glass closest to the outside air or adjacent zone and “Inside” values represent the side closest to the zone that the window is defined in.
The detailed glass library member detail screen will display the detailed glass properties.
Detailed glass properties
Optical Data Type
Valid values for this field in EnergyPlus™ are SpectralAverage, Spectral, and BSDF. However, only the SpectralAverage is available in the first release of TRACE 3D Plus so this field is unable to be edited. The descriptions of the other two methodologies are described below to show the different options available in EnergyPlus™.
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If Optical Data Type = SpectralAverage, the values you enter for solar transmittance and reflectance are assumed to be averaged over the solar spectrum, and the values you enter for visible transmittance and reflectance are assumed to be averaged over the solar spectrum and weighted by the response of the human eye.
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If Optical Data Type = Spectral, then, in the following field, you must enter the name of a spectral data set defined with the WindowGlassSpectralData object. In this case, the values of solar and visible transmittance and reflectance in the fields below should be blank.
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If Optical Data Type = BSDF, the Construction:ComplexFenestrationState object must be used to define the window construction layers. The Construction:ComplexFenestrationState object contains references to the BSDF files which contain the optical properties of the Complex Fenestration layers
Thickness
This is the surface-to-surface thickness of the glass.
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Default value:
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6 mm; 0.25 in.
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Min & Max:
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0 < x <= 100,000
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Typical Range:
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3 to 30 mm; 0.01 to 1.5 in
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Units:
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mm or in
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Conductivity
It is the thermal conductivity. Valid units are W/mK or Btu/hr•ft•°F.
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Default value:
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0.9 W/mK
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Min & Max:
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0 < x <= 100000
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Typical Range:
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N/A
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Units:
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W/mK, W/m°C, Btu/hr•ft•°F
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Solar Transmittance
Transmittance at normal incidence averaged over the solar spectrum. It is used only when Optical Data Type = Spectral Average.
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Default value:
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blank
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Min & Max:
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0 <= x <1
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Typical Range:
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N/A
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Units:
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N/A
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Visible Transmittance
Transmittance at normal incidence averaged over the solar spectrum and weighted by the response of the human eye. Used only when Optical Data Type = Spectral Average.
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Default value:
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blank
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Min & Max:
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0 <= x <1
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Typical Range:
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N/A
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Units:
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N/A
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Infrared Transmittance
Long-wave transmittance at normal incidence
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Default value:
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blank
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Min & Max:
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0 <= x < 1
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Typical Range:
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N/A
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Units:
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N/A
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Outside and Inside Solar Reflectance
The reflectance at normal incidence averaged over the solar spectrum. Used only when Optical Data Type = Spectral Average.
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Default value:
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blank
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Min & Max:
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0 <= x < 1
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Typical Range:
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N/A
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Units:
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N/A
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Outside and Inside Visible Reflectance
The reflectance at normal incidence averaged over the solar spectrum and weighted by the response of the human eye. Used only when Optical Data Type = SpectralAverage.
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Default value:
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blank
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Min & Max:
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0 <= x < 1
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Typical Range:
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N/A
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Units:
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N/A
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Outside and Inside Emissivity
It is the long-wave emissivity.
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Default value:
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blank
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Min & Max:
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0 <= x < 1
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Typical Range:
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N/A
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Units:
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N/A
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