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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Hi Chris,<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">Doug Maddox worked on DOE2.3. Have you checked out his YouTube video on HVAC sizing?
<a href="https://www.youtube.com/watch?v=-w-nhJgjXZw">Douglas Maddox eQUEST DOE23 HVAC Sizing</a><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:"Arial",sans-serif;color:black;mso-ligatures:standardcontextual">William Bishop</span></b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-ligatures:standardcontextual">, PE,
BEMP, BEAP, CEM, LEED AP<br>
Senior Associate / Sustainability & Energy Engineer of Distinction</span><o:p></o:p></p>
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<p class="MsoNormal"><a href="https://pathfinder-ea.com/"><span style="text-decoration:none"><img border="0" width="188" height="70" style="width:1.9583in;height:.7291in" id="_x0000_i1033" src="https://stationerycentral.com/2024/pathfinder-now-imeg-logo-376x140.png" alt="Pathfinder | now IMEG"></span></a><span style="mso-ligatures:standardcontextual"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-ligatures:standardcontextual">Pathfinder</span></b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-ligatures:standardcontextual"> </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#B9B9B9;mso-ligatures:standardcontextual">|</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-ligatures:standardcontextual"> <b>now
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-ligatures:standardcontextual">134 South Fitzhugh Street </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#B9B9B9;mso-ligatures:standardcontextual">|</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-ligatures:standardcontextual"> Rochester, NY 14608
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-ligatures:standardcontextual">(585) 698-1956 </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#B9B9B9;mso-ligatures:standardcontextual">|</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-ligatures:standardcontextual"> phone<br>
(315) 879-1122 </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#B9B9B9;mso-ligatures:standardcontextual">|</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-ligatures:standardcontextual"> mobile</span><span style="mso-ligatures:standardcontextual"><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;mso-ligatures:standardcontextual"><a href="mailto:William.J.Bishop@imegcorp.com"><span style="color:black;text-decoration:none">William.J.Bishop@imegcorp.com</span></a> </span><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#BE2C37;mso-ligatures:standardcontextual">(Please
note my new email address)</span></b><span style="mso-ligatures:standardcontextual"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#1C4678;mso-ligatures:standardcontextual"><a href="https://pathfinder-ea.com/"><span style="color:#1C4678;text-decoration:none">website</span></a> | <a href="https://dynasend.com/signatures/vcard/William.J.Bishop-at-imegcorp.com.vcf"><span style="color:#1C4678;text-decoration:none">vCard</span></a> | <a href="https://www.google.com/maps/place/Pathfinder+Engineers+%26+Architects+LLP/@43.1504815,-77.6145058,17z/data=!3m1!4b1!4m6!3m5!1s0x89d6b4fe9e48aab1:0x6991ae3d559d5aee!8m2!3d43.1504776!4d-77.6119309!16s%2Fg%2F1tcw955j?hl=en&entry=ttu"><span style="color:#1C4678;text-decoration:none">map</span></a></span></b><span style="mso-ligatures:standardcontextual"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black;mso-ligatures:standardcontextual"><a href="https://www.imegcorp.com/news_events/new-york-based-pathfinder-engineers-joins-imeg/"><span style="color:black">Learn more</span></a> about
our transition to IMEG. </span><span style="mso-ligatures:standardcontextual"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Calibri",sans-serif;color:#8A8A8A;mso-ligatures:standardcontextual">This email may contain confidential and/or private information. If you received this email in error please delete and notify sender.
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<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:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Equest-users <equest-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Chris Hadlock via Equest-users<br>
<b>Sent:</b> Thursday, September 12, 2024 8:50 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] eQuest Sizing Methodology<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="background:#FFFF99"><strong><span style="font-size:10.0pt;font-family:"Aptos",sans-serif;color:#9C6500;background:#FFFF99">External Email:
</span></strong><span style="font-size:10.0pt;color:black;background:#FFFF99">Treat links and attachments with caution.</span><o:p></o:p></p>
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<p class="MsoNormal">To clarify one point - I'm using eQuest 3.65 7175 DOE2.3 in my question below.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Wed, Sep 11, 2024 at 3:06<span style="font-family:"Arial",sans-serif"> </span>PM Chris Hadlock <<a href="mailto:cjhadlock@gmail.com">cjhadlock@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Fellow eQuesters,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'm looking to better understand how eQuest is using my sizing inputs to auto-size the heating & cooling capacities as well as airflows. In my example below (for a MURB in Canada), I'm modeling a PSZ system with DX cooling and HW heating.
I've shown in the images below the (first image) sizing inputs from the Basics tab, the (second image) sizing inputs on the heating tab and (third image) the sizing outputs from the SV-C report. For this example, all of the values have been auto-sized based
on the sizing inputs (and in case it matters, this system has no ventilation load):
<o:p></o:p></p>
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<p class="MsoNormal"> <img border="0" width="244" height="207" style="width:2.5416in;height:2.1562in" id="_x0000_i1027" src="cid:image001.png@01DB04F3.30D39BE0"> <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'm looking to better understand how eQuest takes all of my inputs (and which inputs specifically) and derives cooling capacity, heating capacity and airflow for my system in question.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Looking at the SV-C report and the highlight Cooling values:<o:p></o:p></p>
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<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo1">
How does eQuest derive the 232 cfm value (Design Day Peak airflow)?<o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo1">
How is the 6.97 MBH capacity derived? I'm assuming this is based on load passed onto the system, but there are clearly other system-related inputs that affect this value.<o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo1">
I believe the 331 cfm airflow shown as the Design Capacity Airflow is calculated based on my specified Rated Flow/Capacity value (7.11 MBH / 12 MBH/Ton * 558 cfm/Ton = 331 cfm)<o:p></o:p></li></ul>
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<p class="MsoNormal">Looking at the Heating values in the SV-C:<o:p></o:p></p>
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<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo2">
How is the -8.66 MBH capacity derived? I'm assuming this is based on load passed onto the system, but there are clearly other system-related inputs that affect this value?<o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo2">
I believe the -13.49 MBH is calculated based on 331 cfm and a heating dT of 37.8F (331 * 37.8 * 1.085 = -13575) (I might be a little off with my constant value of 1.085). Does eQuest use the Heat dT specifid on the Basic tab or the HT-COIL-AIR-DT value I specified
on the Heating Coil Cap tab?<o:p></o:p></li></ul>
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<p class="MsoNormal">I would like to better understand how eQuest uses the "Heat Sup/Ret dT" and the "Cool Sup/Ret dT" inputs for these calculations? To further understand these interactions, I've run two scenarios. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Scenario 1: if I reduce the Heat dT to 21F and leave the Cooling dT as 19.8F, I get the following output. Why does changing the Heating dT affect the cooling capacities? And how is the Design Heating Capacity of -15.53 MBH determined?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><img border="0" width="682" height="223" style="width:7.1041in;height:2.3229in" id="Picture_x0020_2" src="cid:image002.png@01DB04F3.30D39BE0"><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Scenario 2: if I reduce the Cool dT to 10F and leave the Heating dT as 37.8F, I get the following output. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><img border="0" width="679" height="216" style="width:7.0729in;height:2.25in" id="Picture_x0020_1" src="cid:image003.png@01DB04F3.30D39BE0"><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Any insights that would help me make sense of the eQuest sizing methodology would be appreciated.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Chris<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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