[Radiance-general] Frit Glass trans Paramters

[Aditya Potipireddi]

Andy/Jack,

Thank for providing great resource. I am tying to follow to the process
outlined and have couple of more questions:

1) Since I am using radiance using DIVA for Rhino( Windows operating
system), it creates a Radiance folder with in the DIVA folder. I navigated
to the radiance folder via command prompt window and tried to call for "
glaze" it gave error as glaze is not recognized. I have even installed the
Radiance versions 4.3.a.2 for win32.exe that I downloaded form NREL
radiance releases. Is there a command error ?

2) The "lib" folder under both Radiance folders has only glaze.1cal( single
pane fritted) and glaze2.cal(double pane fritted) files , there is no
"glaze" file are these the same as glaze file?

2) does the example work flow example in the website use unix or cygwin, if
so do i need to install cygwin? and is there specific version of radiance
that i need to install ?

4) can I not execute glaze and optics2glazedb via windows?

3) Should the "optics2glazedb" file put in a specific location and where
does the generated database get written to. Also, what is the file
extension for optics2glazedb ?

Appreciate your help and input.

Regards,

Aditya


On Mon, Apr 6, 2015 at 12:24 PM, Jack de Valpine <jedev at visarc.com> wrote:

>  Hi Andy,
>
> This seems as good a time as any. I put together a blog post about Glass
> in Radiance <http://modsimvis.blogspot.com/>. I need to add some
> information about the optics2rad script but have not gotten around to it.
> But it may be a helpful resource as the topic (glaze) does seem to come up.
>
> Best,
>
> -Jack
>
> --
> Jack de Valpine
> President
>
> Visarc Incorporatedwww.visarc.com
>
> channeling technology for superior design and construction
>
> On 4/6/2015 2:27 PM, Andrew McNeil wrote:
>
> Aditya,
>
>  Trans isn't really a great option for modeling glazing with frit since
> the transmission properties don't change with angle. I'd recommend using
> the glaze script that comes with Radiance to build up your glazing
> material. You simply type 'glaze' at the command line and follow the
> prompts. the internal demo database already has the V175 frit.
>
>  Jack de Valpine gave a presentation describing how to use glaze to build
> up an IGU. And how to use data from LBNL optics to add entries to your
> glaze database (slide 10). He has the low-e coating you're proposing on
> slide 10, so you might be able to just copy it into your local database.
>
> http://www.radiance-online.org/community/workshops/2009-boston-ma/Presentations/devalpine_visarc_glazing.pdf
>
>  Best,
> Andy
>
>
> On Sun, Apr 5, 2015 at 10:57 PM, Aditya Potipireddi <aditect at gmail.com>
> wrote:
>
>> Hi All,
>>
>>  I am trying to model frit glass with varying percentage( 20% to 60%)
>>  of silk screen coverage(dots)  using trans material to compare illuminance
>> levels and glare. I am using DIVA for Rhino simulation interface for
>> Radiance simulation. I am representing the glass as a single surface in the
>> model.
>>
>>  I am struggling to come up with the Transmitted specularity(Ts),
>> Diffuse Transmission(Td) , Reflected specularity(Rs) and the Diffuse
>> reflectance (Cr, Cg,Cb) , so as to calculate the A1 to A7 trans material
>> values.
>>
>>  Any suggestion or pointers on how to estimate or get the above values?
>>
>>  for example, I have the following frit glass assembly with 60% coverage
>> that I pulled form glass manufacture website.
>>
>>  1/4" (6mm) clear VE-85 #2 and 60% Coverage V175 #2
>>
>> 1/2" (13.2mm) argon space
>>
>> 1/4" (6mm) clear
>>
>>
>>  Appreciate your help!
>>
>>
>>  Best,
>>
>>  --
>> Aditya Potipireddi,
>>
>> _______________________________________________
>> Radiance-general mailing list
>> Radiance-general at radiance-online.org
>> http://www.radiance-online.org/mailman/listinfo/radiance-general
>>
>>
>
>
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-- 
Aditya Potipireddi, LEED AP
480.544.4936
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