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<p class=MsoNormal><span style='color:#1F497D'>Christie –<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>The substrate is the glass
without the frit. If it is not a glass layer already in the WINDOW glass
library, a spectral data file needs to be generated from a measurement.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Then the substrate with 100%
frit is also measured. This allows WINDOW to have a value for the substrate
without the frit and the substrate with the frit, which along with your input
of how much the actual frit coverage is, will allow the program to do the
calculation.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>In general, although there is
much expertise on this list-serve, I would recommend that subscribers to this
list email LBNL directly when they have questions about our software (WINDOW,
THERM, Optics, etc), rather than posting the question here.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Robin Mitchell<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Windows & Daylighting Group<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Lawrence Berkeley National
Laboratory <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Rimes, Christie<br>
<b>Sent:</b> Friday, July 16, 2010 1:01 PM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] Frit in Windows6<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hi All,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Why we are all talking about glazing properties, I wanted to
see if anyone had used the new Version of Windows 6 to calculated the glazing
properties of fritted glass. My main question is do we need to get the
manufacture to test the glass with 100% frit on it and then use these
properties for the “glass substrate”. And where does the glazing properties
come from for the specular and diffuse optical data.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>My first guess was that the glass substrate was the glass
layer you were applying the frit to without any properties changed with the use
of frit and that the optical data came from the manufacturer when the glass was
measured with 100% frit.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>The following is the information on modeling frit from the
Windows 6 manual.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#7F7F7F'>The properties
of the fritted glass must be measured in a spectrophotometer, with 100% frit
coverage on a substrate. The substrate used to measure the frit is specified
when defining the fritted glass in WINDOW in the Shading Layer Library. The
percentage of frit coverage is input, and WINDOW will calculate the optical
properties of the frit percentage specified<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#7F7F7F'><o:p> </o:p></span></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;color:#7F7F7F'>Glass
Substrate: </span></i><span style='font-size:10.0pt;color:#7F7F7F'>This
pulldown list shows all the records in the Glass Library. Select the glass
layer that was used as the substrate when the frit was measured. This substrate
should not be changed from the measured substrate – if it is, the calculated
results from WINDOW will not be valid.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#7F7F7F'><o:p> </o:p></span></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;color:#7F7F7F'>Frit
Coverage: </span></i><span style='font-size:10.0pt;color:#7F7F7F'>The percent
of the substrate that is covered in the frit. The original measurement to
obtain the optical properties of the frit is based on 100% frit coverage, and
with that information, WINDOW can recalculate the optical properties of the
frit at any frit coverage specified.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#7F7F7F'><o:p> </o:p></span></p>
<p class=Default><i><span style='font-size:10.0pt;color:#7F7F7F'>Specular </span></i><span
style='font-size:10.0pt;color:#7F7F7F'>Reference to the layer in the <b>Glass
Library </b>that represents the specular measurement of the glass <o:p></o:p></span></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;color:#7F7F7F'>Diffuse </span></i><span
style='font-size:10.0pt;color:#7F7F7F'>Reference to the layer in the <b>Glass
Library </b>that represents the diffuse measurment of the glass.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><img width=607 height=660 id="_x0000_i1026"
src="cid:image002.png@01CB24E8.8796F120"><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><img width=591 height=170 id="Picture_x0020_1"
src="cid:image003.png@01CB24E8.8796F120"
alt="Christie Rimes, Building Simulation Analyst WSP Flack + Kurtz 405 Howard Street, Suite 500 San Francisco, CA 94105 Direct: 415.402.2727 Main Tel: 415.398.3833 Fax: 415.433.5311 website: http://www.wspfk.com vCard: http://vcards.wspfk.com/vcardloader.php?filename=flackkurtz-christie-rimes-wspfk-com-1255981339.vcf image: "><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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