<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
</head>
<body>
<p>Hi Christoph,</p>
<p>We published a Ground-coupled slab BESTEST in 2009 ([full report]
<a class="moz-txt-link-freetext" href="https://www.nrel.gov/docs/fy09osti/45742.pdf">https://www.nrel.gov/docs/fy09osti/45742.pdf</a>;[BS2019
paper] <a class="moz-txt-link-freetext" href="https://www.nrel.gov/docs/fy09osti/45742.pdf">http://www.ibpsa.org/proceedings/BS2009/BS09_1099_1106.pdf</a>).
A number of programs are compared there; this was adapted to
become Section 5.2.4 of ASHRAE Standard 140, <i>Method of Test
for Evaluating Building Performance Simulation Software</i>.</p>
<p>More specific to EnergyPlus (and more recently), Neal Kruis of
Big Ladder Software developed the Kiva ground heat transfer
calculation tool, which is integrated with EnergyPlus and has been
"BESTESTed". (<a class="moz-txt-link-freetext" href="https://bigladdersoftware.com/projects/kiva/">https://bigladdersoftware.com/projects/kiva/</a>)</p>
<p>There's a blurb with section header "Below-Grade Opaque Surfaces"
in the <i>2017 ASHRAE Handbook of Fundamentals</i>, p. 19.12; it
gives additional discussion. That's been updated for the
soon-to-be published <i>2021</i> <i>HoF</i>.<br>
</p>
<p>Cheers.</p>
<p>joel</p>
<font face="Calibri"><font size="-1">Joel Neymark, P.E.</font></font><br>
<font size="-1"> </font>
<div class="moz-signature">
<div class="moz-signature">
<div><font size="-1" face="Calibri"> J. Neymark & Associates<br>
Golden, CO 80401<br>
</font><font face="Calibri"><br>
</font></div>
<div><font face="Calibri"> <br>
</font></div>
</div>
</div>
<div class="moz-cite-prefix">On 2/10/2021 2:11 PM, Christoph
Reinhart via Bldg-sim wrote:<br>
</div>
<blockquote type="cite" cite="mid:cf1189735f89428c96dc396056a2b5ee@oc11expo23.exchange.mit.edu">
<meta name="Generator" content="Microsoft Word 15 (filtered
medium)">
<style>@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}h1
{mso-style-priority:9;
mso-style-link:"Heading 1 Char";
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:24.0pt;
font-family:"Times New Roman",serif;}a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Times New Roman",serif;}span.Heading1Char
{mso-style-name:"Heading 1 Char";
mso-style-priority:9;
mso-style-link:"Heading 1";
font-family:"Times New Roman",serif;
font-weight:bold;}p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman",serif;}span.PlainTextChar
{mso-style-name:"Plain Text Char";
mso-style-priority:99;
mso-style-link:"Plain Text";
font-family:"Times New Roman",serif;}span.EmailStyle21
{mso-style-type:personal;
font-family:"Times New Roman",serif;
color:windowtext;}span.EmailStyle22
{mso-style-type:personal-reply;
font-family:"Times New Roman",serif;
color:#1F497D;}.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}div.WordSection1
{page:WordSection1;}</style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div class="WordSection1">
<p class="MsoPlainText">Dear colleagues,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">I am teaching a new seminar this spring
where we will be digging into more advanced modeling features
such as Trombe walls, solar chimneys and ground heat transfer.
I cannot wait <span style="font-family:Wingdings">J</span>.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Regarding ground heat transfer, I know
that there are a variety of models available within EnergyPlus
from Slab to FC. I wonder if some of you could point me to
good best practice guidelines and papers that compare these
models. I am particular keen on modeling spaces that are half
buried (think Frank Lloyd Wright’s Solar Hemicycle).<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Thank you for your help,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Christoph<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
Bldg-sim mailing list
<a class="moz-txt-link-freetext" href="http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org</a>
To unsubscribe from this mailing list send a blank message to <a class="moz-txt-link-abbreviated" href="mailto:BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG">BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG</a>
</pre>
</blockquote>
</body>
</html>