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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Morteza,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Yes, I agree the DTQS should be modeled as Series PIU terminals.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">To your second question, I suggest you DON’T keep everything equal. The central air handler of System 5 has to supply the peak cooling airflow AND the peak heating airflow. In your proposed
design, the packaged RTUs need to supply the peak cooling airflow to the zones, and could be controlled with low minimum flows based on the minimum ventilation rates. Then the Series PIU terminals use recirculated zone air to meet the heating loads. (Change
the ZONE:INDUCED-AIR-SRC to ZONE-RECIRC.) So you might be able to capture energy savings if you enter specific zone design and minimum airflows for each zone/terminal. I suggest reviewing the help file literature for Powered-Induction Terminals and the many
zone airflow keywords including the terminal ZONE-FAN-RATIO, ZONE-FAN-FLOW. The baseline should be modeled with minimum zone flows per Appendix G but the proposed design minimum zone flows (provided by the packaged rooftops) should be different.</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">~Bill<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:black">William Bishop, PE, BEMP, BEAP, CEM, LEED AP<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black">Senior Energy Engineer<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:3.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></b></p>
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(585) 698-1956</span></i></b><b><i><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">
</span></i></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D">F: (585) 325-6005<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><a href="mailto:wbishop@pathfinder-ea.com"><span style="font-size:9.0pt;font-family:"Arial",sans-serif">bbishop@pathfinder-ea.com</span></a></span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><a href="http://www.pathfinder-ea.com/"><span style="font-size:9.0pt;font-family:"Arial",sans-serif">www.pathfinder-ea.com</span></a></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D">134 South Fitzhugh Street<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D">Rochester, NY 14608
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</span><i><span style="font-size:7.0pt;font-family:"Verdana",sans-serif;color:#00B0F0">Ask me why Carbon Fee & Dividend may be right for you.</span></i><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Paul Riemer <Paul.Riemer@dunhameng.com>
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<b>Sent:</b> Wednesday, July 10, 2019 11:13 AM<br>
<b>To:</b> 'Morteza Kasmai' <morteza.kasmai@gmail.com>; Bishop, Bill <bbishop@pathfinder-ea.com>; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> RE: [Equest-users] Fan Powered Terminal vs Std VAV Terminal<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Morteza,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">When series FPTUs are used throughout a system, the central fans typically have lower static pressure because the FPTUs are doing some of the air pressure work.
You may need to change that as well as changing the terminal units. I don’t think any of us can say make a universal statement that FPTUs are more or less efficient than plain VAVs. There are a lot of variables there including climate, fan system power,
hours of operation, set back behavior, type and efficiency of the heating source, etc, etc.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><b><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#5F574F">Paul Riemer, PE, LEED AP BD+C<br>
</span></b><span style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#5F574F">Senior Associate / Mechanical<br>
</span><b><span style="font-size:11.0pt;font-family:"Verdana",sans-serif;color:#C4262E">DUNHAM</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif"> Equest-users [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Morteza Kasmai via Equest-users<br>
<b>Sent:</b> Wednesday, July 10, 2019 9:44 AM<br>
<b>To:</b> Bishop, Bill<br>
<b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Fan Powered Terminal vs Std VAV Terminal<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274E13">Hello Bill,<br>
Thank you so much for reviewing the model. Since I am not familiar with energy performance of different terminal boxes was wondering if my selection was correct. The mechanical drawings include diagram bellow for VAV terminal and a schedule titled “Fan Powered
Terminal unit Schedule” that marks DTQS as the model of terminal boxes. Manufacturer’s (Titus) literature indicates DTQS as a Digital Series Fan Powered Terminal and very energy efficient.</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#274E13"><o:p></o:p></span></p>
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<span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274E13">My first question is if selecting Series PIU is a correct selection for the proposed terminal. If yes, then my second question would be the energy performance of Series PIU terminals
vs Std VAV terminals. Keeping everything equal, when I change terminal types from Std VAV to Series PIU the annual energy costs increase, which indicates Std VAV terminal is more energy efficient than Series PIU terminal. Is this correct?</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#274E13"><o:p></o:p></span></p>
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<span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#274E13"><o:p> </o:p></span></p>
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<span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274E13">I truly appreciate your help,</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#274E13"><o:p></o:p></span></p>
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<span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274E13">Morteza</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#274E13"><o:p></o:p></span></p>
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<p style="margin-bottom:0in;margin-bottom:.0001pt"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#006600;letter-spacing:.15pt">Morteza Kasmaei<br>
Senior Architect</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#006600">LEED AP BD+C, GGP<b> </b></span><o:p></o:p></p>
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<p class="MsoNormal">On Wed, Jul 10, 2019 at 9:52 AM Bishop, Bill <<a href="mailto:bbishop@pathfinder-ea.com">bbishop@pathfinder-ea.com</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">Hi Morteza,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I looked at your model and nothing jumps out as far as obvious problems. I can’t tell if you’ve modeled anything incorrectly without reviewing the design (which I’m not volunteering
to do).<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">My question back to you is – what is it about the proposed design that should save energy compared to the baseline?<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Regards,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">~Bill<o:p></o:p></p>
<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>Morteza Kasmai via Equest-users<br>
<b>Sent:</b> Tuesday, July 9, 2019 5:07 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] Fan Powered Terminal vs Std VAV Terminal<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:10.0pt;font-family:"Arial",sans-serif;color:#274E13">Dear eQUEST experts,</span><o:p></o:p></p>
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<span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274E13">This is a LEED v4 C&S project modeled with eQUEST 3.65 build 7175 DOE 2.3.</span><o:p></o:p></p>
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<span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274E13">System Type for the Baseline Case is System 5 – Packaged VAV with HW boiler and for the Proposed Model is Gas fired RTUs with Digital Series Fan Powered Terminal (DTQS).
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<span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274E13">Comparing the annual energy costs of the two models, when I change terminal type of the propose design system to Series PIU the energy costs of the model increases by 12%, which indicates
the baseline system is more efficient the design system. Is this correct or there is something wrong with the terminal type selection? INP and PD2 files of the model are attached.</span><o:p></o:p></p>
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<span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274E13">Thank you for your help.</span><o:p></o:p></p>
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<span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274E13">Morteza</span><o:p></o:p></p>
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<p style="margin-bottom:0in;margin-bottom:.0001pt"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#006600;letter-spacing:.15pt">Morteza Kasmaei<br>
Senior Architect</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#006600">LEED AP BD+C, GGP</span><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#006600"> </span></b><o:p></o:p></p>
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