<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Nguan,<br>
Two things occur to me. First, if you take the max of each zone and
then sum them, you will probably get a higher value than if you had
summed the cooling load of the zones, then taken the max. In the first
case, if all of your zone's have their max cooling load at different
times then you can get away with putting in a smaller cooling system
because it will never have to serve all zones at the same time with
their maximum requirement. Second, the QCOOL that you are getting from
Type56 is sensible cooling only. It doesn't account for any latent
cooling that might have to be done as well and therefore does not
represent the total cooling. If you are doing latent cooling, you will
need to activate the "dehumidification" in TRNBuild as well as cooling.
Be a bit careful, however, dehumidification and cooling are treated
completely separately from one another; you can have cooling without
dehumidification and dehumidification without cooling.<br>
Kind regards,<br>
David<br>
<br>
<br>
#TEO NGUAN TECK# wrote:
<blockquote
cite="mid:316ED1F87911FC479407CAB86CD984244D5154@MAIL24.student.main.ntu.edu.sg"
type="cite">
<meta http-equiv="Content-Type" content="text/html; ">
<meta content="MSHTML 6.00.6000.16762" name="GENERATOR">
<style>
<!--
font-face
{font-family:Calibri;}
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{
color:purple;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{
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
{
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{}
div.Section1
{page:Section1;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
-->
</style>
<div id="idOWAReplyText69432" dir="ltr">
<div dir="ltr">Hi ALL,</div>
</div>
<div>
<div class="Section1">
<p class="MsoNormal"> </p>
<p class="MsoNormal">I would like to use TRNSYS to calculate the
cooling load of my building model (altogether 8 zones), instead of
traditional methods. I have carried out the following steps and would
like to know if I am correct:</p>
<p class="MsoNormal"> </p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><span>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>I used the cooling available in TRNBuild and set the
Room Temperature Control to 25 deg C (unlimited power).</p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><span>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>I retrieved the data (QCOOL) and determine the max
QCool required for each zone (by sorting the data using excel).</p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><span>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>I subsequently summed all the maximum QCool from the 8
zones.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">The final value (ie from step 3) will be used to
determine the cooling capacity of my equipment (which is a chilled
water cooling system).</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Are my steps correct? Or can anyone provide me a
better approach?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Any help is deeply appreciated!</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Nguan Teck</p>
<p class="MsoNormal">Undergrad</p>
<p class="MsoNormal">Nanyang Technological University, Singapore</p>
</div>
</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>