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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Morteza!<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="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Recognize there are separate rules/requirements to determine power for system supply/return fans (Pfan), and for terminal unit fans. The rules you
cited regarding minimum flow fraction and 0.35 W/CFM are specific to the fans in the terminal units. Power for the associated supply fan delivering pre-reheat air to those terminal units is determined through the “Pfan” procedures. I advise reviewing the
associated passages in 90.1 appendix G to ensure you understand what others’ spreadsheets are replicating before proceeding. This will help you to utilize such tools correctly and effectively.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">There are two means of specifying fan power in eQuest – you may use one or the other. Coming out of the wizards, by default eQuest will start with
the ESP/fan+motor efficiency inputs. To instead utilize the kW/CFM inputs, navigate to the system fan tab, then right click the inputs for ESP/efficiency on the same screen and press ‘r’ or click “restore default” in the context menu. This will switch the
input method back to kW/CFM and an option to manually define the temperature rise across the fan.<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"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards,<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"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">~Nick<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img width="119" height="37" id="Picture_x0020_1" src="cid:image001.jpg@01CEA89B.EA5D3FA0" alt="cid:489575314@22072009-0ABB"></span><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Stylus BT","sans-serif";color:#2D4D5E">NICK CATON, P.E.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#CC9900">SENIOR ENGINEER<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#CC9900"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">Smith & Boucher Engineers</span><span style="font-size:7.5pt;color:#CC9900"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">25501 west valley parkway, suite 200<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">olathe, ks 66061<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">direct 913.344.0036<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">fax 913.345.0617<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="www.smithboucher.com" title="blocked::www.smithboucher.com"><span style="font-size:10.0pt;color:blue">www.smithboucher.com</span></a></span><u><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:blue">
</span></u><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-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Morteza Kasmai<br>
<b>Sent:</b> Tuesday, September 03, 2013 9:16 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Problem with Fan Power in the Baseline Model System 6<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto"><span style="font-family:"Arial","sans-serif";color:#274E13">Dear Experts,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto"><i><span style="font-family:"Arial","sans-serif";color:#274E13"> </span></i><span style="font-family:"Arial","sans-serif";color:#274E13">I am straggling to input Fan Power in the baseline model (System 6
- Packaged VAV with PFP Boxes) and have the following issues:</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto"><span style="font-family:"Arial","sans-serif";color:#274E13">1- In Table 1.4.6 - General HVAC, there is a note for this type of system that requires</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto"><span style="font-family:"Arial","sans-serif";color:#274E13"> </span><span style="font-family:"Arial","sans-serif"">“All Baseline fans in parallel VAV fan-powered boxes sized for 50% of peak primary airflow
and modeled with 0.35 W/cfm fan power and a minimum flow setpoint of 30% of peak (or minimum ventilation rate) per G3.1.3.14”.<span style="color:#274E13"> </span></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto"><span style="font-family:"Arial","sans-serif";color:#274E13">Supply and return air of the system are equal, 49,202 cfm for each. Based on this cfm, supply fan power and return fan power is 17.22 KW (49,202
* 0.35). This number is different with the figure from ASHRAE 90.1-2007 Baseline Fan Power Calculator (The spreadsheet from 7group). In addition, when I input the supply and return cfm and 17.22 KW for both fans in “Table 1.4.7A - Baseline Air-Side HVAC System
Schedule”, it indicates “Allowed Fan Power” to be 55.4 KW and it will be red out with any other numbers input as system fan power.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto"><span style="font-family:"Arial","sans-serif";color:#274E13"> 2- In eQUEST’s “Fan Power and Control” screen, the input boxes for supply and return design KW/cfm are grayed out (n/) and I cannot input any
data for the fan powers.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto"><span style="font-family:"Arial","sans-serif";color:#274E13">As always, I would truly appreciate your comments,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto"><span style="font-family:"Arial","sans-serif";color:#274E13">Morteza</span><o:p></o:p></p>
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