[Radiance-general] Illuminance Values

[G V DEEPAK]

Yes,

I am aware that 90 degrees closes the blinds completely.
But still some Illuminance values are obtained after closing the 
blinds.


On Thu Feb 26 11:57:37 EST 2009, Greg Ward 
<gregoryjward at gmail.com> wrote:

> You know that putting your blinds at 90 degrees closes them  
> completely, right?
> 
> -Greg
> 
>> From: G V DEEPAK <deepak.gv at ufl.edu>
>> Date: February 26, 2009 8:24:39 AM PST
>> 
>> Hello Everyone,
>> 
>> I am simulating a simple office space 10' X 18' with a 6' X 6'  
>> window, and the automated Venetian blinds. I am trying to 
>> compare  Illuminance values for two models:
>> 1.        In the base case the slats have the same tilt angle at 
>>  one point of time ("conventional control").
>> 2.         In the prototype model, the blinds are divided into  
>> three sections: Top , Middle and Bottom Blinds, each of equal  
>> dimensions ("splitcontrol"). In each section blinds can have the 
>>  different slat tilt angle.
>> 
>> For pilot testing I tested  conventional control for  0, 45 and 
>> 90  degrees and split control for 0, 45, and 90 degrees, too 
>> (i.e. I  kept the same tilt angle in each section of the split 
>> blinds just  for the pilot testing  and the result  comparison 
>> purpose).
>> 
>> The results that I obtained show variation in the values of  
>> Illuminance obtained for these two models (results difference  
>> ranges from 10-150%) although the results should be the same.
>> 
>> Conventional Blind
>> genblinds whitealum main 0.0125 1.82 1.88 195 90 |xform -rz 90 
>> -t  2.71 0.05 0.8>conventional90.rad
>> 
>> Split Blinds
>> 
>> genblinds whitealum main 0.0125 1.82 0.63 66 90 |xform -rz 90 -t 
>>  2.71 0.05 2.06>66-1-90.rad
>> 
>> genblinds whitealum main 0.0125 1.82 0.63 65 90 |xform -rz 90 -t 
>>  2.71 0.05 1.43>66-2-90.rad
>> 
>> genblinds whitealum main 0.0125 1.82 0.63 65 90 |xform -rz 90 -t 
>>  2.71 0.05 0.8>66-3-90.rad
> 
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G V DEEPAK
Graduate Research Assistant
M.E. Rinker, Sr. School of Building Construction.
University Of Florida.