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<p class="MsoFootnoteText"><span style="font-family:"Calibri",sans-serif">When the answer to a Nick question seems simple I do doubt myself…..<o:p></o:p></span></p>
<p class="MsoFootnoteText"><span style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoFootnoteText"><span style="font-family:"Calibri",sans-serif">I assume yall know this but the reason I use EIR FPLR is to change the curve used based on the application. Ie ASHRAE 90.1 fan curve.
<o:p></o:p></span></p>
<p class="MsoFootnoteText"><span style="font-family:"Calibri",sans-serif"> There is an ASHRAE paper out there that defines curves for static reset. .
</span>Jeff Stein and Mark Hydeman’s “Development and Testing of the Characteristic Curve Fan Model, ASHRAE Transactions, January 2004<span style="font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal">I use these in utility studies to justify energy savings<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#006600">Melissa Crowe, LEED AP, BEMP</span></b><b><i><span style="font-size:9.0pt;font-family:"Arial",sans-serif"><o:p></o:p></span></i></b></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">508-647-9200 ext. 1225<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> Nicholas Caton <Nicholas.Caton@se.com> <br>
<b>Sent:</b> Friday, February 28, 2020 9:56 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Quirk I've wondered about - Fan EIR-fPLR<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">eQuest wizards, if specifying a VAV, will generate systems using a library curve and the following 2 lines:
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in">FAN-CONTROL = FAN-EIR-FPLR<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">FAN-EIR_FPLR = “Variable Speed Drive FPLR”<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Looks like this in the interface:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is there a practical reason this approach is taken in lieu of FAN-CONTROL = SPEED? Does one input option perhaps predate the other? Do these approaches result in different effective curves to describe net fan/motor/VSD effects as a function
of flow? Do these approaches perhaps interact differently in the presence of a MIN-FAN-RATIO?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am being lazy here – but if someone has a slow afternoon, some of these open questions would be easy enough to quantify with a dummy model and some custom hourlies =).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">~Nick<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif;color:#3A7A46">Nick Caton, P.E., BEMP</span></b><span style="color:#3A7A46"><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:#626469"> Senior Energy Engineer<o:p></o:p></span></p>
<p class="MsoNormal" style="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>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469">913 . 564 . 6361<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469">785 . 410 . 3317<o:p></o:p></span></p>
<p class="MsoNormal"><u><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469"><a href="mailto:nicholas.caton@se.com"><span style="font-family:"Calibri",sans-serif;color:#626469">nicholas.caton@se.com</span></a></span></u><span style="font-size:9.0pt;color:#1F497D"><o:p></o:p></span></p>
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