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<p class="MsoNormal">Great catch! Same aborted simulation though…<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:8.5pt;font-family:"Arial",sans-serif;color:black"><img width="125" height="54" style="width:1.3in;height:.5666in" id="_x0000_i1029" src="http://www.tbcxinc.com/TBCx_Logo_Email1000ppi.png" alt="TBCx"></span><span style="font-size:8.5pt;font-family:"Arial",sans-serif;color:black"><br>
<br>
<b>Matt Garlick, CxA, CEM, BEMP</b><br>
Mobile: 801-907-5654<br>
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</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>From:</b> Erik Kolderup <erik@kolderupconsulting.com> <br>
<b>Sent:</b> Friday, January 17, 2020 9:43 AM<br>
<b>To:</b> Matthew S. Garlick <msg@tbcxinc.com><br>
<b>Cc:</b> Nicholas Caton <Nicholas.Caton@se.com>; Jeff Hirsch <james.j.hirsch@gmail.com>; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] DOAS and Fan Coils<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">Noticed in your .inp file that you have a CHW design temperature of 14F. Maybe that's the problem? Try something like 44F. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">-Erik<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>Erik Kolderup, PE, LEED AP</b><o:p></o:p></p>
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<p class="MsoNormal"><a href="mailto:erik@kolderupconsulting.com" target="_blank">erik@kolderupconsulting.com</a><span style="color:#999999"> | 415.531.5198 | </span><a href="http://www.kolderupconsulting.com" target="_blank">www.kolderupconsulting.com</a><span style="color:#999999"> </span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Fri, Jan 17, 2020 at 8:21 AM Matthew S. Garlick via Equest-users <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thanks for the responses! Unfortunately adding design days didn’t help. I still get the following errors:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">With just four pipe fan coil system:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">**WARNING**********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> DOAS System: ERV-1 does not serve any</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> any systems (or zones), and will not be simulated.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">**WARNING**********************************************************************
</span></b><b><span style="font-size:9.0pt;font-family:"Courier New";color:black;background:white">(This x50)</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> PredictX parabolic solution failed. Please</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> send this input and weather file to program developers 3015</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Heat-Exchanger: HSouth Perim Zn (T.S40) UA calculation</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> failed to converge.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Heat-Exchanger: HWSW Perim Zn (G.WSW5) UA calculation</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> failed to converge.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Fatal HVAC simulation errors.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">With the DOAS serving the fan coil system (No heat recovery) and delivering OA to conditioned zones:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***NOTE************************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Convergence issues in Design-Day mode 14</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Hours Slow: 8; Hours Failed: 0</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Heat-Exchanger: HWest Perim Zn (M.W10) UA calculation</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> failed to converge.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Heat-Exchanger: HEast Perim Zn (M.E12) UA calculation</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> failed to converge.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Fatal HVAC simulation errors.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">With the DOAS and heat recovery serving the fan coil system:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***NOTE************************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Convergence issues in Design-Day mode 14</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Hours Slow: 7; Hours Failed: 138</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">**WARNING**********************************************************************
</span></b><b><span style="font-size:9.0pt;font-family:"Courier New";color:black;background:white">(this x50)</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> PredictX parabolic solution failed. Please</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> send this input and weather file to program developers 3015</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Heat-Exchanger: HSouth Perim Zn (M.S13) UA calculation</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> failed to converge.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Heat-Exchanger: HWSW Perim Zn (T.WSW41) UA calculation</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> failed to converge.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Heat-Exchanger: HNorth Perim Zn (G.N8) UA calculation</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> failed to converge.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Heat-Exchanger: HSouth Perim Zn (Mb.S22) UA calculation</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> failed to converge.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Fatal HVAC simulation errors.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I tried switching the weather file (This was a custom built file) and got the same errors so I don’t think the error lies there. I’ve attached the INP, PD2 (3.65 build 7175) and
weather file for anyone with the time and desire to look into it. <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thanks again for the help, you guys rock!
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span style="font-size:8.5pt;font-family:"Arial",sans-serif;color:black"><img border="0" width="125" height="54" style="width:1.3in;height:.5666in" id="gmail-m_1172884151207986680_x005f_x0000_i1028" src="http://www.tbcxinc.com/TBCx_Logo_Email1000ppi.png" alt="TBCx"><br>
<br>
<b>Matt Garlick, CxA, CEM, BEMP</b><br>
Mobile: 801-907-5654<br>
<br>
</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>From:</b> Nicholas Caton <<a href="mailto:Nicholas.Caton@se.com" target="_blank">Nicholas.Caton@se.com</a>>
<br>
<b>Sent:</b> Thursday, January 16, 2020 9:19 PM<br>
<b>To:</b> Matthew S. Garlick <<a href="mailto:msg@tbcxinc.com" target="_blank">msg@tbcxinc.com</a>><br>
<b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a>; Jeff Hirsch <<a href="mailto:james.j.hirsch@gmail.com" target="_blank">james.j.hirsch@gmail.com</a>><br>
<b>Subject:</b> RE: DOAS and Fan Coils<o:p></o:p></p>
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</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Matt,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Well-documented!<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">It’s been somewhat established through a couple threads over the past few months that “convergence errors” can sometimes, if not always, be related to difficulties in the system
sizing portion of the simulation, and in those scenarios may be resolved by providing DESIGN-DAY inputs and/or manually specifying coil capacities you are relying on eQuest to auto-size.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">You might check this possibility off the list by navigating to your first tab (Project & Site), deleting any design days you see there in the component tree, then importing the
attached to see if that has any effect.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I believe references to convergence in the errors can also sometimes be a red herring, but in this case I’m not seeing some related telltale language in those screen snips. If
you do encounter something to the effect of “MsgBomb call argument: “ followed by some number of digits that is something you’ll want to document/share as well.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">~Nick<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Arial",sans-serif;color:#3A7A46"><img border="0" width="624" height="8" style="width:6.5in;height:.0833in" id="gmail-m_1172884151207986680Picture_x0020_1" src="cid:image001.jpg@01D5CD1B.13C92CA0" alt="cid:image005.png@01D515A3.47EDD880"></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-family:"Arial",sans-serif;color:#3A7A46">Nick Caton, P.E., BEMP</span></b><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469"> Senior Energy Engineer</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-indent:4.5pt">
<span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469"> Energy and Sustainability Services</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469"> Energy Performance Contracting
</span><o:p></o:p></p>
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</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#57B069">M </span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#57B069">E </span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469">913 . 564 . 6361</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469">785 . 410 . 3317</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><u><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469"><a href="mailto:nicholas.caton@se.com" target="_blank"><span style="font-family:"Calibri",sans-serif;color:#626469">nicholas.caton@se.com</span></a></span></u><o:p></o:p></p>
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<p class="MsoNormal" align="right" style="mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:right">
<span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469">15200 Santa Fe Trail Drive<br>
Suite 204<br>
Lenexa, KS 66219</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#3A7A46"><img border="0" width="722" height="49" style="width:7.525in;height:.5083in" id="gmail-m_1172884151207986680Picture_x0020_2" src="cid:image002.png@01D5CD1B.13C92CA0" alt="cid:image006.png@01D515A3.47EDD880"></span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>From:</b> Equest-users <<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>>
<b>On Behalf Of </b>Matthew S. Garlick via Equest-users<br>
<b>Sent:</b> Thursday, January 16, 2020 6:41 PM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] DOAS and Fan Coils<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Howdy,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I’m trying to simulate a four pipe fan coil system with a DOAS ERV providing outdoor air in DOE 2.3 and getting some errors I haven’t been able to figure out, I’m hoping someone
here knows the answer!<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">The fan coil system runs by itself, connected to a campus CHW and steam loop, though I get the following error in my sim file:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Heat-Exchanger: L1West Perim Zn (G.W1) UA calculation</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> failed to converge.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:8.0pt;font-family:"Courier New";color:black"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">This seems to be a random zone and switches every time I run it. Besides defining OA flow at the zone, there are no other custom inputs at this time on the zone. When I add the
DOAS (without the ERV) to the “OA From” field in the fan coil system, I get an aborted simulation and the following errors:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***NOTE************************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Convergence issues in Design-Day mode 14</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Hours Slow: 3209; Hours Failed: 0</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Heat-Exchanger: HENE Perim Zn (M.ENE16) UA calculation</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> failed to converge.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Heat-Exchanger: HSouth Perim Zn (Mb.S22) UA calculation</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> failed to converge.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Fatal HVAC simulation errors.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:8.0pt;font-family:"Courier New";color:black"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Adding the ERV to the DOAS gets me a new set of errors:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***NOTE************************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Convergence issues in Design-Day mode 14</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Hours Slow: 3384; Hours Failed: 1834</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Heat-Exchanger: HNorth Perim Zn (M.N17) UA calculation</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> failed to converge.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">**WARNING**********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> PredictX parabolic solution failed. Please</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> send this input and weather file to program developers 3015</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Heat-Exchanger: HEast Perim Zn (T.E39) UA calculation</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> failed to converge.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in">
<b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white">***ERROR***********************************************************************</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:8.0pt;font-family:"Courier New";color:black;background:white"> Fatal HVAC simulation errors.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:8.0pt;font-family:"Courier New";color:black"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Same notes and warnings as before but it adds the PredictX warning around 50 times (I edited the above).
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I tried stepping back to DOE 2.2 but of course you can’t define a DOAS in that engine and in 2.2 and 2.3 I’m unable to put an ERV on a fan coil system type.
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">So then, can anyone shine a light on what’s going on?<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial",sans-serif;color:black"><img border="0" width="125" height="55" style="width:1.3in;height:.575in" id="gmail-m_1172884151207986680_x005f_x0000_i1027" src="http://www.tbcxinc.com/TBCx_Logo_Email1000ppi.png" alt="TBCx"><br>
<br>
<b>Matt Garlick, CxA, CEM, BEMP</b><br>
Building Efficiency Engineer | TBCx<br>
<br>
E-mail: <a href="mailto:msg@tbcxinc.com" target="_blank">msg@tbcxinc.com</a><br>
Mobile: 801-907-5654<br>
Direct: 801-401-9492<br>
<br>
324 S. State Street, Suite 400<br>
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