<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
Nguan,<br>
Your wall type GROUND is set up as a BOUNDARY wall with a constant
convection coefficient of 11 kJ/h on the inside surface and an
internally calculated convection coefficient on the back side. The
convection coefficient for the back (non-zone) side of a BOUNDARY wall
is usually set as a very small number (0.0001) if the back side surface
is in direct thermal contact with the boundary temperature (as in the
case of ground coupling) or to a constant or scheduled value of your
choosing.<br>
Kind regards,<br>
David<br>
<br>
<br>
#TEO NGUAN TECK# wrote:
<blockquote
cite="mid:316ED1F87911FC479407CAB86CD98424447A39@MAIL24.student.main.ntu.edu.sg"
type="cite">
<meta http-equiv="Content-Type" content="text/html; ">
<meta name="Generator" content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* 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.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
/* List Definitions */
@list l0
{mso-list-id:1830516611;
mso-list-type:hybrid;
mso-list-template-ids:2120268812 67698705 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l0:level1
{mso-level-text:"%1\)";
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
-->
</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="Section1">
<p class="MsoNormal">Hi ALL,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have included chilled ceiling into my model
and have
encountered an error during simulation. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The error message is : <b><i>Error in automatic
heat
transfer calculation for surface 5 or its adjacent surface!:
Automatic heat transfer calculation is only allowed on surfaces within
a
zone. Please check building input file (.bui)!</i></b><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any advice on how to rectify the error? Attached
are my
files.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Note</b>: The data used for the chilled
ceiling is
intended for trial purpose, final values have not been confirmed.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">More queries on chilled ceiling:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">1)<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->Are there tutorials available on
simulation using active
layers and chilled ceiling?<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">2)<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->For simulation using chilled ceiling
& active layer,
do they handle only the sensible cooling part in TRNSYS? From my
understanding,
chilled ceilings only handle sensible cooling and external equipment
must be
used to dehumidify outdoor air.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">3)<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->Should I model a Dedicated Outdoor Air
System (DOAS) to
handle the latent cooling or it is not required? [in response to point
no. (2)]<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any help is deeply appreciated!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Nguan Teck<o:p></o:p></p>
<p class="MsoNormal">Undergrad<o:p></o:p></p>
<p class="MsoNormal">NTU, Singapore<o:p></o:p></p>
</div>
<pre wrap="">
<hr size="4" width="90%">
_______________________________________________
TRNSYS-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:TRNSYS-users@cae.wisc.edu">TRNSYS-users@cae.wisc.edu</a>
<a class="moz-txt-link-freetext" href="https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users">https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users</a>
</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
***********************************************************************
Thermal Energy System Specialists (TESS), LLC
David BRADLEY 22 N. Carroll Street - Suite 370
Partner Madison, WI 53703
USA
P: +1.608.274.2577
F: +1.608.278.1475
E-mail: <a class="moz-txt-link-abbreviated" href="mailto:bradley@tess-inc.com">bradley@tess-inc.com</a>
Web Pages: <a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a> and <a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a>
***********************************************************************</pre>
</body>
</html>