Re: [EnergyPlus_Support] changing glass properties

["Michael J. Witte" <mjwitte@xxxxxxxx>]

This extra layer of glass is not necessary.  Blinds may be interior, exterior 
or between panes.  WindowShadingControl can control the blinds in any of these 
three locations without requiring any extra layers of glass.

Mike


On 23 Aug 2007 at 10:34, neslihanturkmenoglu wrote:

> I had to define a glass layer in order to put my blinds in front of 
> window. But as I do not want the glass to be considered in the 
> calculation(open window with blind)I changed the transmittance and 
> reflectance values to 0.99999 and 0.00001 in order. But it gives an 
> error like;
> 
> ** Severe  ** Solar transmittance + front solar reflectance not < 
> 1.0 for material GLASS - CLEAR PLATE 1 / 4 IN
>    ** Severe  ** Solar transmittance + back solar reflectance not < 
> 1.0 for material GLASS - CLEAR PLATE 1 / 4 IN
>    ** Severe  ** Visible transmittance + front visible reflectance 
> not < 1.0 for material GLASS - CLEAR PLATE 1 / 4 IN
>    ** Severe  ** Visible transmittance + back visible reflectance 
> not < 1.0 for material GLASS - CLEAR PLATE 1 / 4 IN
> 
> their sum is equal to 1 . So what is the error? I didn't 
> understand.I've attached my summary input file.
> Thank you 
> 
> !-   ===========  ALL OBJECTS IN CLASS: MATERIAL:WINDOWGLASS 
> ===========
> 
> MATERIAL:WINDOWGLASS,
>     GLASS - CLEAR PLATE 1 / 4 IN,  !- Name
>     SpectralAverage,         !- Optical Data Type
>     ,                        !- Name of Window Glass Spectral Data 
> Set
>     0.0001,                  !- Thickness {m}
>     0.999999999,             !- Solar Transmittance at Normal 
> Incidence
>     0.000000001,             !- Solar Reflectance at Normal 
> Incidence: Front Side
>     0.000000001,             !- Solar Reflectance at Normal 
> Incidence: Back Side
>     0.999999999,             !- Visible Transmittance at Normal 
> Incidence
>     0.000000001,             !- Visible Reflectance at Normal 
> Incidence: Front Side
>     0.000000001,             !- Visible Reflectance at Normal 
> Incidence: Back Side
>     0,                       !- IR Transmittance at Normal Incidence
>     0.8400000,               !- IR Hemispherical Emissivity: Front 
> Side
>     0.8400000,               !- IR Hemispherical Emissivity: Back 
> Side
>     0.9000000;               !- Conductivity {W/m-K}
> 
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
> 
> EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the
> Documentation link and press the "search" button.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 


========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx





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