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<p>Enrico,</p>
<p> Would it be possible to adjust the size of the various
components of your system until the amount of energy required from
the grid is zero?</p>
<p> We run into this kind of situation a lot in developing
components like batteries. The question is what to do when the
battery state of charge goes to zero, there is a load, and no
electrical input. Should the simulation end with an error? If not
and the simulation should continue then something has to meet the
load. The solution (or workaround depending on your point of view)
that we decided on is to say that in this situation, a magical
grid supplies the energy needed to meet the load. If, in reality
that grid is not present then you know at the end of the
simulation that you were unable to meet the load during those
times and/or that you have to increase the amount of generating
capacity (or storage etc.).</p>
<p>I hope that helps!</p>
<p>David</p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 11/07/2018 10:25, Chinello Enrico
wrote:<br>
</div>
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<p class="MsoNormal"><span
style="font-size:11.0pt;color:windowtext">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:windowtext">I’m trying to
model in TRNSYS 17 a system that comprises: solar panels +
controller + battery + load. I’m trying to keep the model
stand-alone, i.e. without any grid interconnection, but I
couldn’t figure out how to set my controller to exclude the
grid. <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:windowtext">Is that possible?
If so, how could I do it?<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:windowtext">Thanks in advance
for your help,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:windowtext">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:windowtext">Enrico Chinello<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:windowtext"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">
TRNSYS-users
<a class="moz-txt-link-rfc2396E" href="mailto:trnsys-users-bounces@lists.onebuilding.org"><trnsys-users-bounces@lists.onebuilding.org></a>
<b>On Behalf Of </b>David BRADLEY via TRNSYS-users<br>
<b>Sent:</b> mercredi 7 novembre 2018 17:15<br>
<b>To:</b> TRNSYS users mailing list at OneBuilding.org
<a class="moz-txt-link-rfc2396E" href="mailto:trnsys-users@lists.onebuilding.org"><trnsys-users@lists.onebuilding.org></a><br>
<b>Cc:</b> David BRADLEY <a class="moz-txt-link-rfc2396E" href="mailto:d.bradley@tess-inc.com"><d.bradley@tess-inc.com></a><br>
<b>Subject:</b> Re: [TRNSYS-users] AHU Example with heat
wheel and VRV system<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p>Al-Hyari,<o:p></o:p></p>
<p> It is not really possible to know what might be going wrong
without running the project. What I would suggest is that you
make a new project to which you add only the exhaust and
outdoor air fans. Make sure they are the right size by
adjusting parameter values and run the simulation using an
online plotter to verify that the temperature, humidity and
flow rate leaving the fans is as you planned for it to be.
Next, add the heat wheel into the system. Again, make sure
that the parameters are correctly set so that the heat wheel
is appropriately sized to the application. Again, use the
online plotter to verify that the temperatures, humidities,
and flow rates exiting the wheel make sense. Keep adding one
component at a time and verifying as you go.<o:p></o:p></p>
<p> kind regards,<o:p></o:p></p>
<p> David<o:p></o:p></p>
<p><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On 11/06/2018 05:44, Al-hyari via
TRNSYS-users wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif">Dear Everyone </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif">so i tried by my own to build the
model for an AHU Equipped with a heat wheel and
auxiliary dx coil connected to a VRV System</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif">i want to know the values of
temperature and relative humidity before and after the
heat wheel. but there is some mistake that i can not
figure it out.</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif">please advise me what can i do to
make the correct model to simulate</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif">in the attached files you can find
the trnsys model and the schematic diagram for the AHU</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif">Regards</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Courier New""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Courier New""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Courier New""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Courier New""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Courier New""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Courier New""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Courier New""><o:p> </o:p></span></p>
</div>
</div>
<div id="ydpd08c6b83yahoo_quoted_2118897686">
<div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica
Neue";color:#26282A">On Tuesday, October 30,
2018, 3:30:38 PM GMT+1, Al-hyari via TRNSYS-users
<a href="mailto:trnsys-users@lists.onebuilding.org"
moz-do-not-send="true"><trnsys-users@lists.onebuilding.org></a>
wrote:
<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica
Neue";color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica
Neue";color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<div id="ydpd08c6b83yiv7403687478">
<div>
<div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif;color:#26282A">Dear
Colleagues</span><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif;color:#26282A">It is my
pleasure to join this discussing group
mail. </span><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif;color:#26282A">so my
question is :</span><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif;color:#26282A">I am
working to simulate an AHU equipped with
Heat wheel and an auxiliary dx coil
connected to a VRV system.</span><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif;color:#26282A">I am new on
TrnSys and i don't have much knowledge.</span><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif;color:#26282A">So if any
one could help me by sendeng a similar
example to study on it and make modification
on the block diagram i would be highly
appreciated.</span><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif;color:#26282A">Regards</span><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Bookman Old
Style",serif;color:#26282A">Laith F.
Al-Hyari</span><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p></o:p></span></p>
</div>
<div id="ydpd08c6b83yiv7403687478yqtfd61241">
<div>
<p class="MsoNormal"><span
style="font-family:"Helvetica
Neue";color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Courier
New";color:#26282A"><o:p> </o:p></span></p>
</div>
</div>
</div>
</div>
</div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica
Neue";color:#26282A">_______________________________________________<br>
TRNSYS-users mailing list <o:p></o:p></span></p>
<div id="ydpd08c6b83yqtfd84798">
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica
Neue";color:#26282A"><br>
<a
href="mailto:TRNSYS-users@lists.onebuilding.org"
target="_blank" moz-do-not-send="true">TRNSYS-users@lists.onebuilding.org</a><br>
<a
href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org"
target="_blank" moz-do-not-send="true">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<p class="MsoNormal"><br>
<br>
<br>
<o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>TRNSYS-users mailing list<o:p></o:p></pre>
<pre><a href="mailto:TRNSYS-users@lists.onebuilding.org" moz-do-not-send="true">TRNSYS-users@lists.onebuilding.org</a><o:p></o:p></pre>
<pre><a href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org" moz-do-not-send="true">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a><o:p></o:p></pre>
</blockquote>
<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
<pre>-- <o:p></o:p></pre>
<pre>***************************<o:p></o:p></pre>
<pre>David BRADLEY<o:p></o:p></pre>
<pre>Principal<o:p></o:p></pre>
<pre>Thermal Energy Systems Specialists, LLC<o:p></o:p></pre>
<pre>3 North Pinckney Street - suite 202<o:p></o:p></pre>
<pre>Madison, WI 53703 USA<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>P:+1.608.274.2577<o:p></o:p></pre>
<pre>F:+1.608.278.1475<o:p></o:p></pre>
<pre><a href="mailto:d.bradley@tess-inc.com" moz-do-not-send="true">d.bradley@tess-inc.com</a><o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre><a href="http://www.tess-inc.com" moz-do-not-send="true">http://www.tess-inc.com</a><o:p></o:p></pre>
<pre><a href="http://www.trnsys.com" moz-do-not-send="true">http://www.trnsys.com</a><o:p></o:p></pre>
</div>
</blockquote>
<br>
<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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