<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Prof Taherian,<br>
Check the assumption that has been made about the boundary
temperature beneath the floor of the building. Leaving that value
set to its default 0C is a common cause of the results you are
seeing. Leaving an input unconnected means that the value of that
input is assumed to be constant throughout the simulation. The value
will be taken from the initial value provided. There are numerous
methods and models for setting the boundary temperature beneath a
slab as a function of time. As a very first rough approximation you
can set it to the average annual air temperature of the building's
location.<br>
best,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 07/07/2015 10:09, Hessam Taherian
wrote:<br>
</div>
<blockquote
cite="mid:5B719F666100AE42B2D63BD8003FE2BA1151AE0C@UABEXMB3.ad.uab.edu"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
<meta name="Generator" content="Microsoft Word 14 (filtered
medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]-->
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Rockwell;
panose-1:2 6 6 3 2 2 5 2 4 3;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
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="MsoNormal">Hi David,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We are modeling a 3D building with external
chiller and cooling coil. The problem we have is that even
with gains in the zones, the airnode temperatures are lower
than the ambient temperature. The cooling effect (through
ventilation) is almost zero yet the zone temperatures are low.
That has puzzled us as to how is that possible.<o:p></o:p></p>
<p class="MsoNormal">Could you point me in the right direction?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><a moz-do-not-send="true"
href="http://www.uab.edu/engineering/home/departments-research/me/people/101-hessam-taherian"><span
style="color:blue">Hessam Taherian</span></a>, PhD<o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Rockwell","serif";color:#006600">Assistant
Professor, and Thermal Fluid Systems Lab coordinator<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Rockwell","serif";color:#006600">SBA
member ASHRAE, Member ASES, IBPSA-USA<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Rockwell","serif";color:#006600">Department
of Mechanical Engineering<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Rockwell","serif";color:#006600">University
of Alabama at Birmingham<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Rockwell","serif";color:#006600">Mailing
address:<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Rockwell","serif";color:#006600">1720
Second Ave. S<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Rockwell","serif";color:#006600">BEC
257<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Rockwell","serif";color:#006600">Birmingham,
AL 35294-4461<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Rockwell","serif";color:#006600">Email:
<a moz-do-not-send="true" href="mailto:taherian@uab.edu"><span
style="color:#006600">taherian@uab.edu</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Rockwell","serif";color:#006600">Office
phone: (205) 934-8461<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Rockwell","serif";color:#006600">Lab
phone: (205) 975-6706<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Rockwell","serif";color:#006600"><a
moz-do-not-send="true"
href="http://scholar.google.com/citations?hl=en&user=UkA8HIgAAAAJ&view_op=list_works"><span
style="color:blue">http://scholar.google.com/citations?hl=en&user=UkA8HIgAAAAJ&view_op=list_works</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Rockwell","serif";color:#006600">Go
Blazers!!
</span><span
style="font-size:9.0pt;font-family:"Tahoma","sans-serif";color:#1F497D"> <img
id="Picture_x0020_1"
src="cid:part4.07080000.00060804@tess-inc.com"
alt="DragonHead_sm.gif" border="0" height="38" width="43"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Tahoma","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Tahoma","sans-serif";color:#1F497D"><img
id="Picture_x0020_2"
src="cid:part5.09090607.03070009@tess-inc.com" alt="U of
Alabama Logo Horizontal_small" border="0" height="76"
width="253"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
TRNSYS-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:TRNSYS-users@lists.onebuilding.org">TRNSYS-users@lists.onebuilding.org</a>
<a class="moz-txt-link-freetext" href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a>
</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
</body>
</html>