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    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:
    <blockquote
cite="mid:9168B03E939B2949A4F5F2FF29F38F8302CFB0@SRV-MAIL-BXL.VK.Roeselare.be"
      type="cite">
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        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif"">Dear
            all,</span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""> </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            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-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US"> </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            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-size:9.0pt;
            font-family:"Arial","sans-serif""
            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-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US"> </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            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-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US"> </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            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-size:9.0pt;
            font-family:"Arial","sans-serif""
            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-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US"> </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US"> </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US">Hoping for an answer,</span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US"> </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif""
            lang="EN-US"> </span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif";
            color:black" lang="NL-BE">Joke De Beuckelaer</span><span
            style="color:black" lang="NL-BE"></span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif";
            color:black" 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-size:9.0pt;
            font-family:"Arial","sans-serif";
            color:black" lang="NL-BE"></span></p>
        <p class="MsoNormal"><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif";
            color:black" lang="NL-BE"> </span></p>
        <p class="MsoNormal"><span style="font-family:"Arial
            Black","sans-serif"; color:#ED2318"
            lang="EN-GB">VK    
          </span><b><span style="font-size:9.0pt;
              font-family:"Arial","sans-serif";
              color:black" lang="EN-GB">HEALTHCARE</span></b><span
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            color:black" lang="EN-GB"> </span><span
            style="font-size:9.0pt;
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            color:#1F497D" lang="EN-GB">    
          </span><span style="font-size:8.0pt; font-family:"Arial
            Black","sans-serif"; color:#ED2318"
            lang="EN-GB">| 
          </span><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif";
            color:#1F497D" lang="EN-GB">    </span><b><span
              style="font-size:9.0pt;
              font-family:"Arial","sans-serif";
              color:black" lang="EN-GB">BUILDINGS</span></b><span
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            color:#1F497D" lang="EN-GB">     
          </span><span style="font-size:8.0pt; font-family:"Arial
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            lang="EN-GB">|</span><span style="font-size:9.0pt;
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            color:#1F497D" lang="EN-GB">     
          </span><b><span style="font-size:9.0pt;
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              color:black" lang="EN-GB">INDUSTRY</span></b><span
            style="font-size:9.0pt;
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            color:#1F497D" lang="EN-GB">     
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          </span><span style="font-size:9.0pt;
            font-family:"Arial","sans-serif";
            color:#1F497D" lang="EN-GB">    </span><b><span
              style="font-size:9.0pt;
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              color:black" lang="EN-GB">INFRA</span></b><span
            style="color:black" lang="EN-US"></span></p>
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            color:black" lang="EN-US"></span></p>
        <p class="MsoNormal"><b><span style="font-size:9.0pt;
              font-family:"Arial","sans-serif";
              color:#ED2318" lang="EN-GB">Value by design</span></b><span
            style="color:black" lang="EN-US"></span></p>
        <p class="MsoNormal"><span style="color:black" lang="EN-US"> </span><span
            style="font-size:9.0pt;
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            color:black" lang="EN-US"></span></p>
        <p class="MsoNormal"><span style="font-size:8.0pt;
            font-family:"Arial Narrow","sans-serif";
            color:#706652" lang="EN-US">VK ENGINEERING  Avenue
            Clemenceaulaan 87, 1070 Bruxelles Brussel, Belgium  
            <br>
          </span><b><span style="font-size:8.0pt;
              font-family:"Arial","sans-serif";
              color:#ED2318" lang="EN-US">t</span></b><span
            style="font-size:8.0pt; font-family:"Arial
            Narrow","sans-serif"; color:#706652"
            lang="EN-US">   +32 2 414 07 77  
          </span><b><span style="font-size:8.0pt;
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          </span><b><span style="font-size:8.0pt;
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              color:#ED2318" lang="EN-US">m</span></b><span
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            lang="EN-US">  +32 473 97 01 50  
          </span><b><span style="font-size:8.0pt;
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              color:#ED2318" lang="EN-US">e</span></b><span
            style="font-size:8.0pt; font-family:"Arial
            Narrow","sans-serif"; color:#706652"
            lang="EN-US">   <a class="moz-txt-link-abbreviated" href="mailto:joke.d@vkgroup.be">joke.d@vkgroup.be</a>  
          </span><b><span style="font-size:8.0pt;
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            color:#706652" lang="EN-US"><a class="moz-txt-link-abbreviated" href="http://www.vkgroup.be">www.vkgroup.be</a></span></p>
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      <br>
      <pre wrap="">_______________________________________________
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</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>
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