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<title>Soil properties</title>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Jannes,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>Soil thermal
properties are very much a function of the soil moisture content, which makes
it a little difficult to assign constant values to the properties.
However, that is what we have to do without solving the heat and moisture
transfer problems simultaneously. I did a comparison between a heat
transfer model and a heat and moisture transfer model for my disseration.
You can get reasonable results with the heat transfer model with a constant
value of thermal conductivity. The best result was to model the top 1
meter of soil with one value of thermal conductivity and soil below this with a
higher thermal conductivity to simulate a higher moisture content. My
dissertation (</span></font><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>A Model for Ground-Coupled Heat and Moisture Transfer
from Buildings)</span></font><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'> is available from <a
href="http://www.nrel.gov/docs/fy03osti/33954.pdf">http://www.nrel.gov/docs/fy03osti/33954.pdf</a>.
Appendix C presents information on soil properties as a function of
moisture content. Specifically, Figure C.4 shows the thermal conductivity
of soil with moisture content. I would recommend assuming a volumetric
moisture content between 155 and 20% for setting the thermal properties.<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Comic Sans MS"><span style='font-size:
10.0pt;font-family:"Comic Sans MS"'>Michael Deru, PhD</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face="Comic Sans MS"><span style='font-size:
10.0pt;font-family:"Comic Sans MS"'>Senior Engineer </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face="Comic Sans MS"><span style='font-size:
10.0pt;font-family:"Comic Sans MS"'>Center for Buildings and Thermal Systems</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face="Comic Sans MS"><span style='font-size:
10.0pt;font-family:"Comic Sans MS"'>National Renewable Energy Laboratory</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face="Comic Sans MS"><span style='font-size:
10.0pt;font-family:"Comic Sans MS"'>Golden <st1:State w:st="on"><st1:place
w:st="on">Colorado</st1:place></st1:State></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face="Comic Sans MS"><span style='font-size:
10.0pt;font-family:"Comic Sans MS"'>303-384-7503</span></font><o:p></o:p></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><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>jacco<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, <st1:date Year="2007"
Day="21" Month="5" ls="trans" w:st="on">May 21, 2007</st1:date> <st1:time
Minute="39" Hour="5" w:st="on">5:39 AM</st1:time><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] Soil
properties</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>
<p><font size=2 face=Arial><span lang=NL style='font-size:10.0pt;font-family:
Arial'>Hello,</span></font><span lang=NL> </span><o:p></o:p></p>
<p><font size=2 face=Arial><span lang=NL style='font-size:10.0pt;font-family:
Arial'>I was wondering if somebody could tell me where i can get data for the
density, thermal conductivity and termal capacities for silt and sandy clay
soils?</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span lang=NL style='font-size:10.0pt;font-family:
Arial'>With kind regards,</span></font><span lang=NL> </span><o:p></o:p></p>
<p><font size=2 face=Arial><span lang=NL style='font-size:10.0pt;font-family:
Arial'>Jannes</span></font><span lang=NL> </span><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>
<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'>==================<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
size=2 face="Courier New"><span style='font-size:10.0pt'>to the BLDG-SIM@GARD.COM mailing list. To unsubscribe <o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>from this mailing list send a blank message to <o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>BLDG-SIM-UNSUBSCRIBE@GARD.COM<o:p></o:p></span></font></pre></div>
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