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Philip,<br>
When you define a coupling air flow rate through an ADJACENT wall,
a quantity of air from the ADJACENT zone enters the active zone. In
your first picture below, 90 kg/h of air would enter zone AT_109
from airnode R_107. If you click on the little green arrow button
that allows you to set whether the flow is constant, scheduled, or
an input, you will see a note explaining what the conditions of the
air entering the zone will be. If you want air to flow the other
direction as well (from AT_109 to R_107) you have to define that
separately in zone R_107. <br>
<br>
The front/back switch has to do with the thermal model and which
surface of the wall is in a given zone.<br>
Kind regards,<br>
David<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 7/25/2014 08:05, Philip wrote:<br>
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<blockquote cite="mid:53D2562F.4040106@gmx.de" type="cite">
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Dear All,<br>
<br>
I could not find an explanation on the coupling "front/back", see
below.<br>
<br>
I want to model an inter-zonal airchange between 2 zones (AT_009
and R_007- <u>green arrow in the screenshot</u>), so I have to
define one zone as "<b>front</b>" and one as "<b>back</b>" and
define the same coupling rate in both zones.<br>
<ul>
<li>But does it make any difference which is defined as front
and which as back?</li>
</ul>
<p>There is also a <b>TRNFLOW </b>Network that connects some
other zones (AT_009 and AT_109 etc. ..) in order to realize<b>
night ventilation</b> through an Atrium.</p>
<p>The zone <b>R_007 is not connected to the TRNFLOW network</b>,
but I guess it would make sense to link it?<br>
</p>
<p>Any help highly appreciated!!!<br>
</p>
<p>Thanks, and have a nice weekend,<br>
Philip<br>
</p>
<br>
<img src="cid:part1.00090908.02040205@tess-inc.com" alt=""><br>
<img src="cid:part2.09010908.03070204@tess-inc.com" alt=""><br>
<img src="cid:part3.04030003.01030204@tess-inc.com" alt=""><br>
<br>
<br>
<br>
<br>
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<br>
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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
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F:+1.608.278.1475
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