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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Eric,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>You can find that article at: <a
href="http://simulationresearch.lbl.gov/dirun/1901.pdf">http://simulationresearch.lbl.gov/dirun/1901.pdf</a>
(page 6) if you want to look at it in more detail. In that on page 7,
they state:<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:6.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>“The fictitious insulating
layer is required to give the correct effective resistance for the construction…”
and also “The procedure makes the approximation that the heat transfer
through an underground surface with no exposed perimeter, such as a basement
floor, is zero.”<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The fictitious R is to more closely approximate the
realistic conditions of the earth contact.<o:p></o:p></span></font></p>
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<p class=MsoNormal><strong><b><font size=2 color="#c75b12" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#C75B12'>JEREMY R. POLING, PE,
LEED AP</span></font></b></strong><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><br>
</span></font><font size=1 color=gray face=Arial><span style='font-size:8.0pt;
font-family:Arial;color:gray'>Senior Sustainability Analyst<br>
Strategic Services<br>
<i><span style='font-style:italic'>Site Solutions | Operations |
Sustainability</span></i></span></font><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><br>
<br>
<strong><b><font color="#c75b12" face=Arial><span style='font-family:Arial;
color:#C75B12'>EPSTEIN</span></font></b></strong><br>
</span></font><font size=1 face=Arial><span style='font-size:8.0pt;font-family:
Arial'><br>
<strong><b><i><font color=green face=Arial><span style='font-family:Arial;
color:green;font-style:italic'>Epstein is a firm believer in sustainability. We
ask that you please consider the environment before printing this e-mail.</span></font></i></b></strong></span></font><i><font
face=Arial><span style='font-family:Arial;font-style:italic'><o:p></o:p></span></font></i></p>
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<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><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-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Eric Shadd<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, September 16,
2009 3:55 PM<br>
<b><span style='font-weight:bold'>To:</span></b> bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] change both
U-EFF & UF/UWMat?</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>There was an
article in BUILDING ENERGY SIMULATION, Vol 19, No 1, Spring 1998, called
"Underground Surfaces How to Get a Better Underground Surface Heat
Transfer Calculation in DOE-2.1E". It outlined the process for
converting F- and C-factors into DOE2 inputs. That article's process
required changing both the U-EFFECTIVE and a Ficticious R
Material (Typically called UF/UWMat in eQUEST).<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>Does anyone know
why they required changing both the U-EFFECTIVE and the Ficticious R
(UF/UWMat)? We've run some parametrics and found the energy use
difference between changing only U-EFFECTIVE versus changing both the
U-EFFECTIVE and Ficticious R to be small.<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>-Eric<o:p></o:p></span></font></p>
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