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<p class="MsoNormal">Nice find Christina!<o:p></o:p></p>
<p class="MsoNormal">All,<o:p></o:p></p>
<p class="MsoNormal">I compiled the three fan curves at the bottom of Table 50 into the attached input file. You can load them into your eQUEST models using File -> Import File…<o:p></o:p></p>
<p class="MsoNormal">A few comments about use of these curves with Appendix G modeling in eQUEST:<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Static pressure reset control is a prescriptive requirement in 90.1-2016 6.5.3.2.3. Therefore, most proposed designs should include SP reset and supply fans should be modeled using
the “MZVAV Good SP Reset Fan Curve” attached.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">The “Multi Zone VAV with VSD and fixed SP setpoint” curve in Table 50 is the same curve required by Appendix G. Supply fans for Baseline System Types 5 through 8 should be modeled
with this fan curve.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Appendix G3.1.3.15 says the same curve applied to Systems 5 through 8 should be applied to Baseline System 11. However, the PNNL PRM Reference Manual p.3.154 says use the “Single zone
VAV fan” curve which is based on perfect static pressure reset and uses the least energy of all the Table 50 curves.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Up until now, I have always used the same fan curve for both supply and return fans (SYSTEM:FAN-EIR-FPLR and SYSTEM:RETURN-EIR-FPLR). However, the PRM Reference Manual p.3.158 says
use the “Multi zone VAV with static pressure reset curve” for Baseline Systems 5 through 8 and 11. I don’t know if this is an error or if there is logic to using a more efficient fan curve for return fans.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Table 50 also has a column for %Powermin, or minimum fan power as a percent of full load power. The values are 20% for MZVAV with fixed SP setpoint (the standard App.G curve) and 10%
for the two static pressure reset curves. However, Appendix G also requires minimum volume set points of 30% for Baseline Systems 5 through 8 and 50% for System 11 (entered in eQUEST using ZONE:MIN-FLOW-RATIO and which should also be adjusted for minimum OA
if necessary). The combination of MIN-FLOW-RATIO and fan curve will dictate the minimum fan power percentage instead of the %Powermin.<o:p></o:p></li></ul>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">~Bill<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<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>
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<p class="MsoNormal"><b>From:</b> Equest-users <equest-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Christina LaPerle via Equest-users<br>
<b>Sent:</b> Thursday, September 9, 2021 7:52 AM<br>
<b>To:</b> fraij <fraij@yahoo.com><br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Modeling Fan Static Pressure Reset in eQuest<o:p></o:p></p>
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<p class="MsoNormal" style="line-height:0%"><span style="font-size:1.0pt;color:white">Hi Ahmad, I typically model this using the fan curves from the PNNL 90.1 2016 PRM Reference Manual. I provided some screenshots below. Christina Christina LaPerle PE, BEMP,
CEM, CBCP Senior Energ <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black">Warning! This message was sent from outside your organization and we are unable to verify the sender.
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<p class="MsoNormal"><span style="font-size:1.0pt;color:white">sophospsmartbannerend
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<p class="MsoNormal">Hi Ahmad,<o:p></o:p></p>
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<p class="MsoNormal">I typically model this using the fan curves from the PNNL 90.1 2016 PRM Reference Manual. I provided some screenshots below.<o:p></o:p></p>
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<p class="MsoNormal">Christina<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:9.5pt;font-family:"Verdana",sans-serif;color:#666666">Christina LaPerle</span></b><span style="font-size:9.5pt;font-family:"Verdana",sans-serif;color:#666666"> PE, BEMP, CEM, CBCP</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Verdana",sans-serif;color:#666666">Senior Energy Engineer, Associate<br>
________________<br>
</span><img border="0" width="151" height="35" style="width:1.5729in;height:.3645in" id="Picture_x0020_3" src="cid:image003.png@01D7A560.83A12AE0"><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#666666">Phone </span><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#1155CC">860.266.6220</span><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#666666"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#6AA84F">We are always looking for motivated professionals to join our team. See our career options </span><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#666666"><a href="https://us-east-2.protection.sophos.com?d=karpmanconsulting.net&u=aHR0cHM6Ly9rYXJwbWFuY29uc3VsdGluZy5uZXQvYXZhaWxhYmxlLWNhcmVlcnM=&i=NWZjNTI0OTJkYjA1OTYwZGY1NmNjOGVj&t=VFR5cGlkL3J6SG0vcVlURXB1VlM3TG5SNXR2N0I3UElrc0dGekIxbXFNST0=&h=b799c90aa2164e48ae44358c5029ff31" target="_blank">here</a></span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#6AA84F">!</span><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#666666"><br>
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<p class="MsoNormal">On Thu, Sep 9, 2021 at 7:47 AM fraij 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">Hello Guys,<o:p></o:p></p>
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<p class="MsoNormal">What is the best way to model fan static pressure reset in eQuest software?<o:p></o:p></p>
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<p class="MsoNormal">Regards<o:p></o:p></p>
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<p class="MsoNormal">Ahmad<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;color:#575757">Sent from my Galaxy<o:p></o:p></span></p>
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<p class="MsoNormal">_______________________________________________<br>
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