[Radiance-general] BSDF with rtcontrib

[Guglielmetti, Robert]

You could try OpenStudio for this; we have a simple implementation of the three phase method currently working with Window6 BSDF files. I'm still working on documentation, but I could help you along offline, if interested.

- Rob

Rob Guglielmetti  IESNA, LEED AP
Commercial Buildings Research Group
National Renewable Energy Laboratory
15013 Denver West Parkway MS:RSF202
Golden, CO 80401
303.275.4319
robert.guglielmetti at nrel.gov


On 7/12/12 1:46 AM, "nassif nassif" <nynassif at gmail.com<mailto:nynassif at gmail.com>> wrote:

Hallo Andy,

thank you for your reply.

I looked through the Tutorial you advised about. I realised the generated results are for one day. In our office we are using the .EPW to generate the results for the whole year. (as used in the tutorial in rtcontrib). Is it possible with BSDF somehow? if yes, Is there any hints or tips to insert the .xml format generated by window7beta into the rtcontrib process?

Thanks in advance!

N.Nassif

On Tue, Jun 12, 2012 at 6:21 PM, <radiance-general-request at radiance-online.org<mailto:radiance-general-request at radiance-online.org>> wrote:
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Today's Topics:

   1. Re: BSDF xml into Radiance (Andrew McNeil)


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Message: 1
Date: Tue, 12 Jun 2012 08:43:53 -0700
From: Andrew McNeil <amcneil at lbl.gov<mailto:amcneil at lbl.gov>>
To: Radiance general discussion <radiance-general at radiance-online.org<mailto:radiance-general at radiance-online.org>>
Subject: Re: [Radiance-general] BSDF xml into Radiance
Message-ID:
        <CAOG+Nizc0-+xrNry_qVJh6-hoA0C-=P5EVTYuc7AiZuD9yqyVQ at mail.gmail.com<mailto:P5EVTYuc7AiZuD9yqyVQ at mail.gmail.com>>
Content-Type: text/plain; charset="iso-8859-1"

Hi Nasif,

Information for the BSDF material is at the bottom of page 12:
http://radsite.lbl.gov/radiance/refer/refman.pdf

Though I've found that the BSDF material doesn't work well for
daylight coefficient based annual simulations (I'm assuming dds.bash is a
dynamic daylight simulation script).  Putting the solar radiance into
skypatches relies on probabilistic sampling to find patches containing the
sun, and if you don't have much direct transmission from the direction of
the sun, you aren't likely to find the sun.  Not finding the sun causes big
errors.  For now, the three-phase method is a better alternative for annual
simulation of BSDF materials (you can find a tutorial at the bottom of this
page: http://www.radiance-online.org:82/learning/tutorials - if you're at
work, your company's firewall might block access to port 82 - the temporary
location of the new radiance online).

Andy





On Tue, Jun 12, 2012 at 8:18 AM, nassif nassif <nynassif at gmail.com<mailto:nynassif at gmail.com>> wrote:

> Hallo,
>
> I manage to obtain bsdf in xml Format using Window7beta, but i couldn't
> know how to insert it in radiance. Is there somewhere an example how to
> embed or convert it into radiance material? I need to use it in dds.bash (
> or rtcontrib).
>
> Thanks in advance
>
> --
> *N.Nassif
>
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