Re: [EnergyPlus_Support] Window simulation

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

What specific window properties did you change?  In EnergyPlus 
MATERIAL:WINDOWGLASS, you specify reflectances and transmittances, and the 
remaining solar energy is absorbed in the glass.  With all other inputs equal, 
a lower transmittance will result in higher absorptance which will increase the 
glass temperature and offset some of the benefits of the lower transmittance.  
Perhaps it would help to report the surface temperatures and other window-
related report variables both models to help explain the results.

Mike


On 17 Nov 2006 at 16:22, ronald_borduni wrote:

> Hi,
> 
> in my simualtion, i tried to change the glass of the windows on my 
> building for glass with less solar penetration, in fact to minimize 
> the thermal load. But the result i heve is a increase of 1% in my 
> thermal load, besides the decreasing i expected.
> I've made some tests like remove the windows, to see what happens, and 
> the thermal load reduced considerably. So, i think i hadn't declared 
> wrongly the windows, but i don't know what's going on. 
> Can someone help me?
> Thanks,
> 
> Ronald.
> 
> 
> 
> 
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> 
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> 
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> 
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> "search" button.
>  
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> 
> 
> 
> 
> 
> 


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





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