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<p>I suspect that you're going to have some trouble with the EMPA
model. It has some restrictions on the ratio of the center to
center pipe distance to the floor thickness. Also, that thickness
of concrete might give TRNBuild a hard time in determining the
transfer function coefficients. I realize you said you do not have
Type1267 but it would allow you to define such an arrangement.
You'd define a thin top layer for the floor in 56 as a BOUNDARY
and then you'd define the concrete that makes up the rest of the
floor as a material in Type1267. You can then tell it how the
pipes run through the concrete.</p>
<p>best,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 03/26/2021 16:01, leen peeters via
TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAB_-mWOT=BqUVHEgJn3wVjbgnjbUB=tnxehb48ko1gYxftgtMA@mail.gmail.com">
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<div>Hi all,</div>
<div><br>
</div>
<div>I need to model a freezer (-16 to -22 degrees Celcius),
with floor heating at pipe-to-pipe distances of 60 cm. Floor
is composed of (bottom to top) 25 cm concrete with the floor
heating, 20 cm of insulation on top of that and 10 cm of
concrete on top of the insulation.</div>
<div>Is the EMPA model embedded in type 56 suited for this?</div>
<div><br>
</div>
<div>Another case is simply the floor heating concrete layer,
and no layers on top. Some question here but with distances
between pipes equaling 50 cm.</div>
<div><br>
</div>
<div>Thanks <br>
</div>
<div>Leen<br>
</div>
</div>
<br>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
<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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