[Bldg-sim] interstitial blinds shading
mhsueh at integralgroup.com
Tue Aug 5 11:05:28 PDT 2014
Actually, I think you're correct that the BSDF can be applied to thermal
simulations. A cursory Google search reveals some research into using BSDF
in the way you're talking about, but the widespread use is largely for
visual rendering/daylighting realm. One abstract I found indicates that
Window 7 produces BSDF functions, which demonstrates the utility of that
software for your purposes. I think next steps would be to figure out if
you can get Window 7 to simulate interstitial shades. If yes, then you'd
end up with a generally applicable SHGC that would probably be pretty good
for whatever modeling software you'd be using for larger (building) scale
questions. The good thing is that Window 7 also outputs surface
temperatures, which I think speaks to your interest in understanding
operative temperature near the windows.
*Michael Hsueh* | Project Engineer
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On Tue, Aug 5, 2014 at 10:51 AM, Chris Yates <chris.malcolm.yates at gmail.com>
> It is primarily on heat gain and operative temp near to the glazing. I
> wasn't aware that BSDF was limited to daylight - need to read the e+
> documents with my glasses on next time!
> Cheers/ Chris
> Sent from my Android device. Please excuse typos, etc.
> On 5 Aug 2014 17:48, "Michael Hsueh" <mhsueh at integralgroup.com> wrote:
>> That's an interesting question -- I haven't done any modeling of
>> interstitial blinds myself, but I think that Window might be able to do
>> this? I know that it has functionality for modeling "advanced shading",
>> though I haven't personally explored it much. Someone else who is
>> well-versed in that program can weigh in on this.
>> Would be good to get some clarification on your question though -- you
>> mentioned the BSDF, which so far as I know is mainly used in a daylight
>> modeling context. Are you mainly interested in the daylight quality aspects
>> of interstitial blinds, or are you thinking mostly about SHGC and
>> subsequent cooling energy in the space? If the latter, I think a simple
>> calc/model would likely get you close enough without needing to delve into
>> too much detail.
>> *Michael Hsueh* | Project Engineer
>> *Integral Group *| 427 13th Street | Oakland CA USA 94612
>> T 510.663.2070 x 241
>> integralgroup.com <http://www.integralgroup.com/> | mhsueh
>> *Trust* | *Nurture* | *Inspire*
>> *See our new book: Integral: Revolutionary Engineering
>> Please consider the environment before printing this email.
>> This email may contain confidential and/or privileged information. If you
>> are not the intended recipient or have received this email in error, please
>> notify the sender immediately and destroy this email. Any unauthorized
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>> email is prohibited.
>> On Tue, Aug 5, 2014 at 9:21 AM, Chris Yates <
>> chris.malcolm.yates at gmail.com> wrote:
>>> Dear All,
>>> I'm aware that there is some cutting edge stuff being done on this. I am
>>> interested in this, but also in commercial modeller's experiences - i.e.
>>> mainstream practice.
>>> I'd just like to throw a few questions out there:
>>> 1. Does anybody model these regularly?
>>> 2. What are the merits of simple vs more computationally expensive
>>> modelling methods (e.g. Bidirectional Scattering Distribution Function)?
>>> 3. Are there any well recognized (i.e. mature/ main stream)
>>> standards covering blind/ shade glazing combinations?
>>> 4. What are the relative merits (if any) of expressing Blind /
>>> glazing combinations as a simple SHGC? Or is this outside the remit of the
>>> standard completely?
>>> 5. What are your experiences of glazing suppliers providing accurate
>>> Kind regards
>>> Chris Yates
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