functionglassProperty
Compute angular variation and hemispherical integration of the transmittance and reflectance for each glass pane without shading
Extends from Buildings.HeatTransfer.Windows.Functions.BaseClasses.partialGlassRadiation (Partial function for glass radiation property).
Information
This function computes the angular variation and the hemispherical integration of the transmittance and reflectance for each glass pane. There are two schemes for the calculation. One is for coated glass and the other is for uncoated glass. The function checks the difference between front and back reflectances. If the difference is less than the tolerance (0.005), it uses the formula for uncoated glass. Otherwise, the formula for coated glass will be used.
Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | N (from partialGlassRadiation) | Number of glass layers | |
| Integer | NSta (from partialGlassRadiation) | Number of window states for electrochromic windows (set to 1 for regular windows) | |
| Integer | HEM (from partialSingleGlassRadiation) | Index of hemispherical integration | |
| Real[3,N,NSta] | glass | Propertry of each glass pane | |
| Real[N] | xGla | Thickness of each glass pane | |
| Modelica.Units.SI.Angle[HEM - 1] | psi | Incident angles |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real[3,N,HEM,NSta] | layer | Transmittance, front and back reflectance |
Revisions
-
August 7, 2015, by Michael Wetter:
Revised model to allow modeling of electrochromic windows. This is for issue 445. -
December 12, 2011, by Wangda Zuo:
Calculate the property using formula for coated (existing) and uncoated glass (newly added). -
August 24, 2010, by Wangda Zuo:
First implementation.