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<p>Hoofar,</p>
<p> If you click on the "Geometry Modes" button in a given zone you
can switch one or more zones to "manual mode." This allows you to
create the geometry in Trnsys3d but then autosegment the floors of
a particular zone afterwards. The disadvantage, of course, is that
once you switch a zone to manual mode you cannot then go back and
edit the building geometry in Trnsys3D.</p>
<p><br>
</p>
<p> If you do not want to switch to manual mode then here are some
responses to your questions:</p>
<p><br>
</p>
<div>1) How should <span style="display: inline !important; float:
none; background-color: rgb(255, 255, 255); color: rgb(0, 0, 0);
font-family:
Calibri,Helvetica,sans-serif,"EmojiFont","Apple
Color Emoji","Segoe UI
Emoji",NotoColorEmoji,"Segoe UI
Symbol","Android Emoji",EmojiSymbols; font-size:
16px; font-style: normal; font-variant: normal; font-weight:
400; letter-spacing: normal; orphans: 2; text-align: left;
text-decoration: none; text-indent: 0px; text-transform: none;
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word-spacing: 0px;">
be </span>the surfaces split in Trnsys3D? Have I used the right
approach?</div>
<div><br>
</div>
<div>I believe that what you've done is reasonable. The autosegment
feature puts a number of smaller floor areas in series.<br>
</div>
<div><br>
</div>
<div>2) How can they be manually connected? (when the
Autosegmentation is done, surfaces are automatically connected in
series with automatic inlet temperature and the same inlet flow
rate)</div>
<div><br>
</div>
<div>I think you will need to do this by adding outputs and inputs
to your Type56 model. The connections will need to be done outside
of Type56 in the Simulation Studio.<br>
</div>
<div><br>
</div>
<div>3) After splitting the floors, which output shows the overall
heat transfer to the zone and which one shows the final outlet
fluid temperature?</div>
<div><br>
</div>
<div>I think that for the overall heat transfer to the zone you'll
need to sum up a number of Type556 outputs. The overall heat
transfer to the zone will be the sum of the heat transfer to the
zone from each individual floor piece. The final outlet
temperature will depend upon the order in which you connect the
floors to one another in the Simulation Studio. I'd suggest using
the surface IDs that TRNBuild assigns and drawing a picture so
that you can keep all the connections straight.<br>
</div>
<div><br>
</div>
<div>4) What should be the standard number of fluid loops per square
meter?</div>
<div><br>
</div>
<div>There is an equation in the TRNBuild/Type56 manual that
suggests a way of computing the number of loops based on how long
you want each individual pipe to be.</div>
<div><br>
</div>
<div>kind regards,</div>
<div> David</div>
<div><br>
</div>
<div><br>
</div>
<p><br>
</p>
<div class="moz-cite-prefix">On 03/21/2020 11:38, Hemmatabady,
Hoofar via TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:ad1e290ccc3541c4b4c1dc96b8541a28@geo.tu-darmstadt.de">
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dir="ltr">
<div>Hello,</div>
<div><br>
</div>
<div>I am working on a project on heating a house with a heat
pump. I designed a Trnsys3D model of the house, which I need
to implement a floor heating system on it. After adding an
active layer in TRNbuild, got the error "<span>Specific fluid
mass flow of active layer in surface 16 below minimum value
of 2.96 kg/m2h Please, increase the minimum mass flow rate
or use the autosegmentation feature of TRNBuild for
subdividing the surface.</span>".</div>
<div><br>
</div>
<div>As I have a 3d model, the Autosegmentation is not possible.
Therefore, following TRNbuild documentation "<span>For
airnodes with 3D geometric information the splitting of
surfaces have to be done in Trnsys3D and then manually
connected</span>", I split my floors (in Sketchup) into 20
equal surfaces using parallel lines and imported my 3d model
back to TRNbuild. </div>
<div><br>
</div>
<div>Here are my questions:</div>
<div><br>
</div>
<div>1) How should <span style="display: inline !important;
float: none; background-color: rgb(255, 255, 255); color:
rgb(0, 0, 0); font-family:
Calibri,Helvetica,sans-serif,"EmojiFont","Apple
Color Emoji","Segoe UI
Emoji",NotoColorEmoji,"Segoe UI
Symbol","Android Emoji",EmojiSymbols;
font-size: 16px; font-style: normal; font-variant: normal;
font-weight: 400; letter-spacing: normal; orphans: 2;
text-align: left; text-decoration: none; text-indent: 0px;
text-transform: none; -webkit-text-stroke-width: 0px;
white-space: normal; word-spacing: 0px;">
be </span>the surfaces split in Trnsys3D? Have I used the
right approach?</div>
<div>2) How can they be manually connected? (when the
Autosegmentation is done, surfaces are automatically connected
in series with automatic inlet temperature and the same inlet
flow rate)<br>
</div>
<div>3) After splitting the floors, which output shows the
overall heat transfer to the zone and which one shows the
final outlet fluid temperature?</div>
<div>4) What should be the standard number of fluid loops per
square meter?</div>
<div><br>
</div>
<div><br>
</div>
<div>Best regards</div>
<div>Hoofar Hemmatabady</div>
<div><br>
</div>
<div><br>
</div>
<div><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
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
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