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The Type56 model by itself does not calculate any interzonal air
flow (ie the buoyancy of warmer air is not accounted for). Type56
allows you to specify coupling airflow between zones. Calculation of
the coupling airflow must be done by integrating Type56's thermal
solution with TRNFlow, COMIS, or Type97 (Contam). The effect you are
seeing is only due to a change between the star-network (simple)
radiation model and the gebhardt factor (detailed) radiation model
now available in Type56.<br>
Kind regards,<br>
David<br>
<br>
On 4/14/2011 09:46, <a class="moz-txt-link-abbreviated" href="mailto:pseudomino@gmx.com">pseudomino@gmx.com</a> wrote:
<blockquote cite="mid:20110414144642.35590@gmx.com" type="cite"><span
style="font-family: Verdana;"><span style="font-size: 12px;"><span
style="font-family: verdana;"><span style="font-size: 12px;">Hi,<br>
<br>
In Trnsys 17, I made a very simple test : two little
air-nodes superposed, forming part of a thermal zone.<br>
There is only one windows facing south, at the first
floor. I ditn't made anything else.<br>
<br>
<strong>Case 1 : Simple radiation model</strong><br>
Quite realistically, the second floor is warmer.<br>
<br>
<strong>Case 2 : Detailed radiation model</strong><br>
The 2 air-nodes have their temperatures centered around
the same value and very near, except that the first floor
has more extreme temperature variations.<br>
<br>
I want to illustrate the hot air elevation by a simple
example, but I'm not sure of the phenomenon that are taken
into account.<br>
<br>
Thank you !</span></span></span></span>
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<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>
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