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    <p>Hoofar,</p>
    <p>  In order to segment a floor, you need to set the geometry mode
      in that zone to "manual" which unfortunately means that you can no
      longer do detailed radiation calculations in that zone. You are
      prevented from adding additional surfaces (which is essentially
      what happens when you segment the floor) unless you are in manual
      geometry mode in TRNBuild.</p>
    <p>kind regards,</p>
    <p> David</p>
    <p><br>
    </p>
    <p><br>
    </p>
    <div class="moz-cite-prefix">On 04/30/2020 15:26, Hemmatabady,
      Hoofar wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:b18127888d354fd6b8b0f64967c45975@geo.tu-darmstadt.de">
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          <div style="">Dear David,<br>
          </div>
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          <div style="">Regarding my previous email,</div>
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          <div style="">#1) When I switch to "manual mode" and click on
            "Divide Surface" button, it doesn't segment the floor and
            again gives one segment for the whole floor (The attached
            image).</div>
          <div style=""><br>
          </div>
          <div style="">I also realized that it is possible to change
            the minimum allowable flow rate by changing pipe spacing.
            But as it should be according to the standards, I cant
            change it that much. Is there any other way to resolve this
            problem?</div>
          <div style=""><br>
          </div>
          <div style="">Thank you in advance.</div>
          <div style=""><br>
          </div>
          <div style="">Best regards</div>
          <div style="">Hoofar</div>
          <div style=""><br>
          </div>
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        <div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
            face="Calibri, sans-serif" color="#000000"><b>Von:</b>
            Hemmatabady, Hoofar<br>
            <b>Gesendet:</b> Dienstag, 24. März 2020 11:00:04<br>
            <b>An:</b> David BRADLEY<br>
            <b>Betreff:</b> AW: [TRNSYS-users] Floor Heating - Trnsys3D</font>
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            <p>Dear David,</p>
            <p><br>
            </p>
            <p>Thank you for your reply. </p>
            <p><br>
            </p>
            <p>#1) When I switch to "manual mode" and click on "Divide
              Surface" button, it doesn't segment the floor and again
              gives one segment for the whole floor (The attached
              picture, ManualMode).</p>
            <p><br>
            </p>
            <p>#3) What is the surf-ID definition order in TRNbuild? 
              e.g., for the zone first floor (<span
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                word-spacing:0px">he attached picture</span>, surf-ID),
              which is heated by the active layer with the construction
              type "ADJ_CEILING_basement",  should I give the fluid
              inlet temperature and flow rate from simulation studio to
              the surf-ID 44 and then give the output from 44 to
              <b><u>46</u></b> and from 46 to 47 and....?</p>
            <p><br>
            </p>
            <p>Best regards</p>
            <p>Hoofar</p>
            <p><br>
            </p>
            <p><br>
            </p>
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          <div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
              face="Calibri, sans-serif" color="#000000"><b>Von:</b>
              David BRADLEY <a class="moz-txt-link-rfc2396E" href="mailto:d.bradley@tess-inc.com"><d.bradley@tess-inc.com></a><br>
              <b>Gesendet:</b> Montag, 23. März 2020 13:43:23<br>
              <b>An:</b> TRNSYS users mailing list at OneBuilding.org<br>
              <b>Cc:</b> Hemmatabady, Hoofar<br>
              <b>Betreff:</b> Re: [TRNSYS-users] Floor Heating -
              Trnsys3D</font>
            <div> </div>
          </div>
          <div>
            <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="">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>
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                <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="">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>
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              <pre class="moz-quote-pre">_______________________________________________
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</pre>
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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" moz-do-not-send="true">d.bradley@tess-inc.com</a>

<a class="moz-txt-link-freetext" href="http://www.tess-inc.com" moz-do-not-send="true">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com" moz-do-not-send="true">http://www.trnsys.com</a></pre>
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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>

<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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