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<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Dear All,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Thanks for your replies.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>We currently have a
thermal camera but I never used it to record quantitative results. <st1:City
w:st="on"><st1:place w:st="on">Brandon</st1:place></st1:City>, you mentioned
about “tuning” the heat transfer equation. If we write a steady-state
surface heat balance equation for the inner side of the wall:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Q_convection=Q_conduction<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>h*(T_air – T_wall_in)=k*(T_wall_in
- T_wall_out)/x_wall <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>where radiation is
negligible and h is known, than we should be able to calculate k and u-value,
if I am not wrong. Is this what you mean by tuning? <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>The u-values that I
obtain either by calculation or measurement need not to be accurate in the
academic level, instead it should be practical so as to analyze more houses and
reach more people. We actually intend to improve the energy efficiency of
houses for which neither we nor the inhabitant have information about the
constituents of the wall.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Prof. Sibilio, thanks
for referring me the Hukseflux. As I called the company, they told me that each
heat flux measurement takes about 24 hours. Is this the way you do it or do you
know any tricks to get reasonable results in a shorter time.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Gunes Inan<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span lang=TR style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=TR style='font-size:
10.0pt;font-family:Tahoma;font-weight:bold'>Kimden:</span></font></b><font
size=2 face=Tahoma><span lang=TR style='font-size:10.0pt;font-family:Tahoma'> BLDG-SIM@gard.com
[mailto:BLDG-SIM@gard.com] <b><span style='font-weight:bold'>Yerine </span></b>Brandon
Nichols<br>
<b><span style='font-weight:bold'>Tarih:</span></b> 08 Mayıs 2007 Salı 20:58<br>
<b><span style='font-weight:bold'>Kime:</span></b> BLDG-SIM@gard.com<br>
<b><span style='font-weight:bold'>Konu:</span></b> [BLDG-SIM] On-site U-value
measurement</span></font><span lang=TR><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face="Lucida Console"><span
style='font-size:10.0pt;font-family:"Lucida Console";color:blue'>Hello,</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face="Lucida Console"><span
style='font-size:10.0pt;font-family:"Lucida Console";color:blue'>You may
find an infrared thermal imager to be a powerful tool, useful for the
application you have indicated and many others. Here's a link to Fluke
Corp. thermal imaging notes for building systems, there are many other
manufacturers...</span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face="Lucida Console"><span
style='font-size:10.0pt;font-family:"Lucida Console";color:blue'><a
href="http://us.fluke.com/usen/support/appnotes/default?category=AP_TH_BM(FlukeProducts)&parent=AP_THERMO(FlukeProducts">http://us.fluke.com/usen/support/appnotes/default?category=AP_TH_BM(FlukeProducts)&parent=AP_THERMO(FlukeProducts</a>)</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face="Lucida Console"><span
style='font-size:10.0pt;font-family:"Lucida Console";color:blue'>For building
systems, the thermal imager is useful for finding voids in insulation,
infiltration losses, calculating the overall heat loss correction due to
framing framing elements, etc..</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face="Lucida Console"><span
style='font-size:10.0pt;font-family:"Lucida Console";color:blue'>Using the
thermal imager, you will have to "tune" heat loss equations
based on observed temperature differential data to derive U-values. These
instruments typically have the ability to scan large areas and quickly
calculate a weighted average and other statistical factors for each
image. </span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face="Lucida Console"><span
style='font-size:10.0pt;font-family:"Lucida Console";color:blue'>Unfortunately
they are not cheap, and probably overkill for just measuring the
U-values of specific materials. Personally I don't know any way to
measure U-values directly with a hand-held instrument, but it seems such a
device wouldn't be hard to put together with a data acquisition unit and a
couple of thermocouples.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face="Lucida Console"><span
style='font-size:10.0pt;font-family:"Lucida Console";color:blue'>Regards</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face="Lucida Console"><span
style='font-size:10.0pt;font-family:"Lucida Console";color:blue'>Brandon
Nichols, PE<br>
Mechanical<br>
HARGIS ENGINEERS<br>
<st1:Street w:st="on"><st1:address w:st="on">600 Stewart St</st1:address></st1:Street><br>
<st1:address w:st="on"><st1:Street w:st="on">Suite</st1:Street> 1000</st1:address><br>
<st1:place w:st="on"><st1:City w:st="on">Seattle</st1:City>, <st1:State w:st="on">WA</st1:State>
<st1:PostalCode w:st="on">98101</st1:PostalCode></st1:place><br>
d | 206.436.0400 c | 206.228.8707<br>
o | 206.448.3376 f | 206.448.4450<br>
<a href="http://www.hargis.biz">www.hargis.biz</a></span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabIndex=-1>
</span></font></div>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
BLDG-SIM@gard.com [mailto:BLDG-SIM@gard.com] <b><span style='font-weight:bold'>On
Behalf Of </span></b>Gunes Inan<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, May 08, 2007 7:46
AM<br>
<b><span style='font-weight:bold'>To:</span></b> BLDG-SIM@gard.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> [BLDG-SIM] On-site
U-value measurement</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Dear All,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>We are looking for a
hand-held instrument for on-site measurement of the U-value or thermal
conductivity of walls. Any experience about the measurement techniques and
recommendations about instruments and brands are greatly appreciated. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Thank You,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Gunes Inan</span></font><font
size=1 color=navy face="Century Gothic"><span style='font-size:8.0pt;
font-family:"Century Gothic";color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=navy face="Century Gothic"><span
style='font-size:8.0pt;font-family:"Century Gothic";color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=2 color=black face=Verdana><span lang=TR
style='font-size:10.0pt;font-family:Verdana;color:black'>R&D Engineer</span></font><font
size=2 color=navy face=Verdana><span lang=TR style='font-size:10.0pt;
font-family:Verdana;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=2 color=black face=Verdana><span lang=TR
style='font-size:10.0pt;font-family:Verdana;color:black'>Betek Paint and
Chemical Corp., Inc. </span></font><font size=2 color=navy face=Verdana><span
lang=TR style='font-size:10.0pt;font-family:Verdana;color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=2 color=black face=Verdana><span lang=TR
style='font-size:10.0pt;font-family:Verdana;color:black'>Kavakpınar Mah.,
Tandoğan Cad. No: 175, <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=2 color=black face=Verdana><span lang=TR
style='font-size:10.0pt;font-family:Verdana;color:black'>Kaynarca, Pendik</span></font><font
size=2 color=navy face=Verdana><span lang=TR style='font-size:10.0pt;
font-family:Verdana;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=2 color=black face=Verdana><span lang=TR
style='font-size:10.0pt;font-family:Verdana;color:black'>Istanbul, Turkey</span></font><font
size=2 color=navy face=Verdana><span lang=TR style='font-size:10.0pt;
font-family:Verdana;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=2 color=black face=Verdana><span lang=TR
style='font-size:10.0pt;font-family:Verdana;color:black'>Tel: +90.216.396.2070
/ Ext: 177</span></font><font size=2 color=navy face=Verdana><span lang=TR
style='font-size:10.0pt;font-family:Verdana;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=2 face=Verdana><span lang=TR
style='font-size:10.0pt;font-family:Verdana'>Fax: +90.216.396.6989<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<pre><font size=2 face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>==================<o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>You received this e-mail because you are subscribed <o:p></o:p></span></font></pre><pre><font
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size=2 face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>==================<o:p></o:p></span></font></pre><pre><font
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