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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Omar,<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">I wrote the following fan power email previously so it is not specific to your case, but it may be helpful and includes an important caution on defaults. To your
specific question, fan power is calculated per G3.1.2.9. There are static pressure allowances for baseline PSZ if applicable to your case, listed in 6.5.3.1.1. There are a few tools available to help calculate the fan power for Appendix G if you don’t create
your own, such as <a href="http://www.rmi.org/ModelingTools">EMIT from Rocky Mount Institute</a>.<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">There are two ways to enter system fan power – using either SUPPLY-STATIC and SUPPLY-EFF, or using SUPPLY-DELTA-T and SUPPLY-KW/FLOW. These inputs are shown here:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img border="0" width="551" height="365" id="Picture_x0020_1" src="http://ARCHIVER.PATHFINDER-EA.COM:8080/cgi-mod/getstubbedattachment.cgi/image004.jpg?charset=utf-8&cid=image004.jpg%4001CDEA94.E3CF3780&delivery=1357351320&len=35534&md5=6075eb6dd225742240674662c0eec1c0&mid=45c6611a05a825b62347e012aae8664ad408abdbe8db2cb944d695b0c4aa42ef2ade843d"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have found that it generally makes sense to enter SUPPLY-KW/FLOW (in kW/cfm), because it can be easily calculated if you have the fan BHP, and because baseline ASHRAE 90.1-Appendix G system fan power is calculated the same way.<o:p></o:p></p>
<p class="MsoNormal">The eQUEST wizard generates values for static and efficiency. You can see in the screen shot above that I have created and applied a user-defined default value of 0.0003 kW/cfm.
<i>However, I have not “restored default” to the static and efficiency values assigned by the wizard.</i> Since the static and efficiency values are red, these are considered user inputs, which override user-defined defaults. In the example above, my user-defined
default value has not been used, resulting in lower-than-intended fan power. To remove the unwanted values in red above, you can right-click and “restore default”, which in this case will leave an empty box for static and “n/a” for efficiency. The quicker
way to do this for a model with many systems is to do a find-and-replace in the input file and delete all the lines with “SUPPLY-STATIC” and “SUPPLY-EFF”.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This concludes this episode of <b><i>D’oh! How could I miss that?!</i></b><o:p></o:p></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"><o:p> </o:p></span></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
</span></b><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:#006600">|</span></b><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:black"> Pathfinder Engineers & Architects LLP<o:p></o:p></span></b></p>
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<p class="MsoNormal" style="line-height:105%"><b><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black">Senior Energy Engineer<o:p></o:p></span></b></p>
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<p class="MsoNormal" style="line-height:105%"><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#1F497D">134 South Fitzhugh Street</span><span style="font-size:9.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#1F497D">
</span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#1F497D">Rochester, NY 14608<o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:105%"><b><i><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#002060">T: (585) 698-1956</span></i></b><b><i><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#002060">
</span></i></b><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#1F497D">F: (585) 325-6005</span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:105%"><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#1F497D"><a href="mailto:wbishop@pathfinder-ea.com"><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif">bbishop@pathfinder-ea.com</span></a></span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black">
</span><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#1F497D"><a href="http://www.pathfinder-ea.com/"><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif">www.pathfinder-ea.com</span></a><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-top:3.0pt;line-height:105%"><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#1F497D"><img border="0" width="42" height="40" id="Picture_x0020_5" src="cid:image009.png@01D0A295.FDE1B9C0" alt="http://png-5.findicons.com/files/icons/977/rrze/720/globe.png"></span><span style="font-size:7.5pt;line-height:105%;font-family:"Calibri",sans-serif;color:#00B0F0">Carbon
Fee and Dividend - simple, effective, and market-based.</span><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#1F497D"><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"><o:p> </o:p></span></p>
<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"> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Omar ElRawy<br>
<b>Sent:</b> Tuesday, June 09, 2015 5:26 AM<br>
<b>To:</b> equest<br>
<b>Subject:</b> [Equest-users] Indoor fan separation at ARI<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;text-align:justify"><b><span style="font-family:"Arial",sans-serif;color:black">Dear all,</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;text-align:justify"><b><span style="font-family:"Arial",sans-serif;color:black"> I've got the following reply for a psz system in the baseline case during preliminary LEED design submittal:</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;text-align:justify"><o:p> </o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;text-align:justify"><b><span style="font-family:"Arial",sans-serif;color:black">"</span></b><b><span style="font-family:"Arial",sans-serif;color:#38761D">N</span></b><span style="font-family:"Arial",sans-serif;color:#38761D">ote
that section G3.1.2.1 requires that where efficiency ratings, such as EER and COP, include fan energy, the descriptor shall be broken down into its components so that supply fan energy can be modeled separately. Because the efficiency ratings are calculated
at ARI-rated conditions, the fans should also be broken out at ARI-rated conditions. Most simulation software programs have the capability to perform this step automatically. Provide documentation showing that this calculation has been performed by the software
automatically or provide calculations consistent with the ASHRAE 90.1-2007 User’s Manual showing that the calculation has been performed at ARI-rated conditions</span><span style="font-family:"Arial",sans-serif;color:black">."</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;text-align:justify"><o:p> </o:p></p>
<p style="margin:0in;margin-bottom:.0001pt;vertical-align:baseline;outline:0px;background-image:initial;background-repeat:initial">
<span style="font-family:"Arial",sans-serif;color:black">What I did is that I referred to eQuest library, and documented the following paragraph to the reviewer:</span><o:p></o:p></p>
<p style="margin:0in;margin-bottom:.0001pt;vertical-align:baseline;outline:0px;background-image:initial;background-repeat:initial">
<span style="font-family:"Arial",sans-serif;color:black">"</span><span style="font-family:"Arial",sans-serif;color:#783F04">COOLING-EIR:<br>
The Electric Input Ratio (EIR), or 1/(Coefficient of Performance), for the cooling unit at ARI rated conditions..... This EIR is at ARI rated conditions, i.e., without correction for different temperature or part load. Note: If you include fan electric energy
consumption in your value of COOLING-EIR, then you should set SUPPLY-KW/FLOW to zero. Otherwise, the supply fan electrical energy will be double counted........ Imbedding the fan energy into the COOLING-EIR is valid only if the fan is constant volume and INDOOR-FAN-MODE
= INTERMITTENT; i.e. the fan cycles on/off with the compressor. If the fan runs continuously during occupied hours, or the fan is variable volume, then the fan energy cannot be included in the COOLING-EIR (or HEATING-EIR).</span><span style="font-family:"Arial",sans-serif;color:black">"</span><o:p></o:p></p>
<p style="margin:0in;margin-bottom:.0001pt;vertical-align:baseline;outline:0px;background-image:initial;background-repeat:initial">
<span style="font-family:"Arial",sans-serif;color:black">And I did set fan kw/cfm to zero, intermittent, and constant volume, but I've got the SV-A report reporting zero kw power demand, and zero fan (kw) for the system and its zones.</span><o:p></o:p></p>
<p style="margin:0in;margin-bottom:.0001pt;vertical-align:baseline;outline:0px;background-image:initial;background-repeat:initial">
<u><span style="font-family:"Arial",sans-serif;color:black">Then I got an advice stating that:</span></u><o:p></o:p></p>
<p style="margin:0in;margin-bottom:.0001pt;vertical-align:baseline;outline:0px;background-image:initial;background-repeat:initial">
<span style="font-family:"Arial",sans-serif;color:black">"You should do what the reviewer mentions, divide the indoor fan from the efficiency rating at ARI-rated conditions and model it separately; this way you will be able to report the appropriate fan power"</span><o:p></o:p></p>
<p style="margin:0in;margin-bottom:.0001pt;vertical-align:baseline;outline:0px;background-image:initial;background-repeat:initial">
<span style="font-family:"Arial",sans-serif;color:black">My question is:<b> where do I separately input the indoor fan power (kw), and what value should it be?, knowing that this is a baseline case that do not refer to an actual design.</b></span><o:p></o:p></p>
<p style="margin:0in;margin-bottom:.0001pt;vertical-align:baseline;outline:0px;background-image:initial;background-repeat:initial">
<span style="font-family:"Arial",sans-serif;color:black">Thanks,</span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:9.5pt;font-family:"Arial",sans-serif;color:#222222">Omar ElRawy, LEED AP BD+C</span></b><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial",sans-serif;color:#222222">LEED Project Manager<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial",sans-serif;color:#222222">EA Sustainable Building Consultants<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial",sans-serif;color:#222222"><a href="http://www.ea-buildingconsultants.com/" target="_blank">http://www.ea-buildingconsultants.com</a><o:p></o:p></span></p>
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