Fritted glass script for Radiance

Dear Galen,

I have been following your discussion regarding modeling of glazing types and was hoping you might be able to point me in the right direction. Your discussion so far seems rather relevant to the issue with which I am concerned. I have little familiarity with Radiance or writing scripts for Radiance, however.

I am doing a comparative study of glazing types for illuminance levels on the interior of a large atrium space lighted by a barrel vaulted skylight. I am using Ecotect and exporting to Radiance, allowing Radiance to render the image and then re-importing the point data back into Ecotect for graphic representation and interpretation. The specific glass types I am trying to model are Viracon's VE340, VE340 with 30% grey frit and VE340 with 50% grey frit. Viracon provided the .rad files from Optics, but the results I am obtaining don't seem to correlate. I suspect it has something to do with the Optics output and how it deals with a frit. I have attached the files and was hoping you could provide some insight.

Sincerely,

Ted Biro

VE340-NFRC 6057+Clear-NFRC 103_glass.rad (715 Bytes)

VE340-30%V175+Clear-NFRC 103.rad (709 Bytes)

VE340-50%V175+Clear-NFRC 103.rad (709 Bytes)

Hi Ted,

If you've been following the discussion, you'll know that you cannot use the output of Optics5 directly in Radiance and expect to get good results. You need to use optics2rad or the glaze script to arrive at a good model of your glazing system.

Best,
-Greg

ยทยทยท

From: [email protected]
Date: January 15, 2009 8:55:59 PM PST

Dear Galen,

I have been following your discussion regarding modeling of glazing types and was hoping you might be able to point me in the right direction. Your discussion so far seems rather relevant to the issue with which I am concerned. I have little familiarity with Radiance or writing scripts for Radiance, however.

I am doing a comparative study of glazing types for illuminance levels on the interior of a large atrium space lighted by a barrel vaulted skylight. I am using Ecotect and exporting to Radiance, allowing Radiance to render the image and then re-importing the point data back into Ecotect for graphic representation and interpretation. The specific glass types I am trying to model are Viracon's VE340, VE340 with 30% grey frit and VE340 with 50% grey frit. Viracon provided the .rad files from Optics, but the results I am obtaining don't seem to correlate. I suspect it has something to do with the Optics output and how it deals with a frit. I have attached the files and was hoping you could provide some insight.

Sincerely,

Ted Biro