Re: [EnergyPlus_Support] visible absorptance and reflectance

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

I do not have much to offer.  I would suggest looking for lighting design 
handbook data from sources such as the Illuminating Engineering Society 
(www.iesna.org).

Googling for "surface color visible absorptance" brings up the 
following regarding vegetation:

http://www.tec.army.mil/research/products/desert_guide/lspectra/intro/intro.htm
http://www.tec.army.mil/research/products/desert_guide/lspectra/intro/fig1.htm

For other types of detached shading surfaces, it will depend on what the 
surface material is, which leads back to the first question.

Mike



On 13 Mar 2006 at 9:51, dademarino wrote:

> Dear Users of EnergyPlus,
> 
> I am making a daylighting analysis of a building without thermal 
> simulation. The color of the internal materials of the walls is 
> important for this analysis. In particular the visible absorptance 
> field in the Material input syntax is important for a daylighting 
> analysis such as written in "InputOutput Reference". 
> I have given one look to "DataSets" about visible absorptance of 
> materials.In "DataSets" the color of the materials is not specified.
> Can someone supply me values of the visible absorptance in relation to 
> the color of materials of the walls?
> 
> An other relative question to my analysis is:
> Can someone supply me values of the visible reflectance about trees and 
> shading detached surfaces? 
> 
> Best Regards,
> 
> Marino Davide.
> 
> 
> 
> 
> 
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> 
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>  
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> 
> 
> 
>  
> 
> 
> 
> 


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





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