<!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">
Tao,<br>
CONTAM itself has two different models for bi-directional flow; a
"one opening" and a "two opening" model. Only the "two-opening" model
is implemented in TRNSYS Type97. When you set up your *.air file in the
CONTAM-W interface, specify all of the large vertical openings through
which you want there to be two-way flow as "two-opening" air flow paths.<br>
<br>
As for your other question, I'm not sure exactly what is happening
there but it seems clear that the model is simply not converging. If
you do not connect the wind data to your building, Type97 (CONTAM's)
assumption is that the windspeed is always zero. However, because the
Type is trying to solve a pressure balance, you still need to make sure
that there are enough openings in the envelope of your building because
ambient pressure still has an important effect. <br>
<br>
What I would recommend that you do is to run the TRNSYS/CONTAM
example and then begin modifying the project one step at a time to make
it more like the building you are trying to simulate. For example, you
could start by disconnecting the windspeed input to Type97, then you
could change the zone volumes of both your Type56 and your Typr97 zones
to be more like your real building, then you could alter the zones
themselves (add more, remove some), etc. <br>
<br>
Kind regards,<br>
David<br>
<br>
On 9/24/2010 05:34, Yujun TAO wrote:
<blockquote cite="mid:600882.23100.qm@web28613.mail.ukl.yahoo.com"
type="cite">
<style type="text/css"><!-- DIV {margin:0px;} --></style>
<div
style="font-family: times new roman,new york,times,serif; font-size: 12pt;">
<div>Hello,<br>
I want to simulate some counter flows in the building by natural
ventilation with Contam, is it necessary to model 2 orifices in every
wall in the Contam model to give 2 directions different?<br>
Whatever, i tried 2 ways: 1 orifice and 2 orifices, but none works. I
always get a error message that there are a window panel is out of
bounds or a zone in the building attain the abosolute 0 K. I don't use
the wind data of the weather file because i study only the stack
effect. I can't understand. Someone could tell why?<br>
Here is attached file.<br>
Thanks in advance for your helps.<br>
<br>
TAO<br>
</div>
</div>
<br>
<pre wrap="">
<fieldset class="mimeAttachmentHeader"></fieldset>
_______________________________________________
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">--
***************************
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>