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Joke,<br>
This came up yesterday as well (how to make a coupling air flow
across a virtual surface) and I unfortunately don't know the answer.
I am looking into it and will let you know what I learn.<br>
Best,<br>
David<br>
<br>
<br>
On 10/18/2011 11:23, Joke De Beuckelaer wrote:
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<p>David,</p>
<p> </p>
<p>Thanks for the answer. But the problem is that it isn't a
100% false ceiling but about 70%.</p>
<p>So what do I do with the "air - air contact" between the two
zones.</p>
<p>Does Trnsys takes this into account when I model it with a
virtual surface in google sketchup or do the airnodes then
have to belong to the same thermal zone?</p>
<p> </p>
<p>Greetings,</p>
<p>Joke</p>
<p> </p>
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<div id="divRpF259461" style="direction:ltr"><font size="2"
color="#000000" face="Tahoma"><b>Van:</b> David BRADLEY
[<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>]<br>
<b>Verzonden:</b> maandag 17 oktober 2011 18:38<br>
<b>Aan:</b> Joke De Beuckelaer<br>
<b>CC:</b> TRNSYS-users<br>
<b>Onderwerp:</b> Re: [TRNSYS-users] Simulation of false
ceiling: influence on inertia<br>
</font><br>
</div>
<div>Joke,<br>
I like to simulate this situation as two thermal zones; the
conditioned zone below and the plenum zone above. Because
the suspended ceiling basically has no mass to it, I
simulate it as a wall made up of a single purely resistive
(ie massless) layer.<br>
best,<br>
David<br>
<br>
<br>
On 10/14/2011 03:44, Joke De Beuckelaer wrote:
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<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt">Dear all,</span></p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt"></span> </p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US">Can anyone help me
what’s the best way to simulate a suspended false
ceiling?</span></p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US"></span> </p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US">The goal is to simulate
a class room where the comfort is assured by using
night ventilation. However for acoustic reasons we
need a false ceiling.</span></p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US">I want to know the
percentage of suspended false ceiling is possible in
order to have still enough inertia from the concrete
ceiling.</span></p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US"></span> </p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US">Is the best way just to
define two different types of ceiling (1. A concrete
ceiling and 2.a false ceiling (concrete + air layer
+ false ceiling)) or has anyone another idea?</span></p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US"></span> </p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US">Is it possible to draw
for example some obstructions in Google sketch up
and then to define 3 air nodes in trnsys. One air
node above the suspended false ceiling; one air node
in the middle of the room and one air node
representing the opening window?</span></p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US">Will it take into
account the less availability of the inertia of the
concrete ceiling?</span></p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US"></span> </p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US"></span> </p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US">Hoping for an answer,</span></p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US"></span> </p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
font-size:9pt" lang="EN-US"></span> </p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
color:black; font-size:9pt" lang="NL-BE">Joke De
Beuckelaer</span><span style="color:black"
lang="NL-BE"></span></p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
color:black; font-size:9pt" lang="NL-BE">project
engineer mep</span><span style="color:black"
lang="NL-BE"></span></p>
<p class="MsoNormal"><span style="color:black"
lang="NL-BE"></span><span
style="font-family:'Arial','sans-serif';
color:black; font-size:9pt" lang="NL-BE"></span> </p>
<p class="MsoNormal"><span
style="font-family:'Arial','sans-serif';
color:black; font-size:9pt" lang="NL-BE"></span> </p>
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lang="EN-US">
<a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:joke.d@vkgroup.be" target="_blank">
joke.d@vkgroup.be</a> </span><b><span
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lang="EN-US"><a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="http://www.vkgroup.be" target="_blank">www.vkgroup.be</a></span></p>
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<pre>_______________________________________________
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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 moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com" target="_blank">d.bradley@tess-inc.com</a>
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://www.tess-inc.com" target="_blank">http://www.tess-inc.com</a>
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://www.trnsys.com" target="_blank">http://www.trnsys.com</a></pre>
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font-weight:bold"> ALWAYS LOOKING FOR GREAT PEOPLE </span><span
style="color:white"></span></span></b><b><span
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lang="EN-GB">
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<span style="color:gray">This communication is confidential
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</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>
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