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<p class="MsoNormal">Thanks SO MUCH to Erik, Bill, Kevin, and Joe for sharing your perspectives!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve nearly worked this out now! Some recap and summary information:<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo4">Recap: PV-A reports a total capacity of
<b><u>13.909 MMBtu/h.</u></b> <o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo4">I do believe now this is exactly as Erik (first) described: It’s
<u>essentially</u> the sum of all of the service hard-input coil capacities<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo4">Adding up all of my specified coil capacities (which I confirmed are reflected perfectly in the SV-A system reports), I total
<b><u>13.808 MMBtu/h</u></b><o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo4">Looking hard for the difference, I identified that at peak conditions, the additional loads captured between the peak “coil” vs peak “net” load per PS-H brings the total up to
<b><u>13.896 MMBtu/h</u></b><o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo4">I am not simulating any additional loop process loads or pipe losses, so I’m not sure what else might be missing to arrive at
<b><u>13.909 MMBtu/h</u></b>, though it does appear pump heat gets me most of the way there.<o:p></o:p></li></ul>
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo4">Regardless, it appears clear that indeed PV-A is reporting non-coincident total cooling capacity owing to how loops (in doe 2.2) default to SECONDARY sizing, which is supposed to simply
sum all connected coils, loop loads, etc.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo4">PS-H and by extension PS-D, by contrast, provide peak
<b><u>Coincident</u></b> load sums. <o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo4">In this particular building (a large 2-story conference center with a ton of glass walls (solar gains) and a hot climate), there is huge difference between the coincident and non-coincident
totals: more than a factor of 2. I’m relieved to assert the peak coincident load in this model, as these results align with real-world operations (where only one chiller of the 3 installed is generally required to handle loads through the hottest days of
the summer season).<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The additional options Bill has highlighted for doe 2.3 are of course a welcome advance! I anticipate we will now through the COINCIDENT/NON-COINCIDENT options be able to get a little more control in how loops are sized up for our simulation.
Should be a pretty great featureset for those leveraging energy simulations to aid in “right sizing” design and plant automation. If the outputs of the model in front of me were available to the designers of 20+ years ago, they might have invested in a plant
of half the size and more constructively spent that elsewhere!<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>
<div>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#3A7A46"><img width="726" height="9" style="width:7.5625in;height:.0937in" id="_x0000_i1032" src="cid:image002.png@01D52298.C53313D0" alt="cid:image005.png@01D515A3.47EDD880"><o:p></o:p></span></p>
<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</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469"> Regional Energy Engineering Manager<o:p></o:p></span></p>
<p class="MsoNormal"><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>
</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469"> Energy Performance Contracting
</span><span style="font-size:9.0pt;color:#1F497D"><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:#57B069">D </span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#57B069">M </span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#57B069">F </span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#57B069">E </span><span style="font-size:9.0pt;color:#1F497D">
<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">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"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469">913 . 564 . 6380<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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<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#626469">15200 Santa Fe Trail Drive<br>
Suite 204<br>
Lenexa, KS 66219<br>
United States</span><span style="font-size:9.0pt;color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-line-height-alt:4.0pt"><span style="color:#3A7A46"><img border="0" width="722" height="49" style="width:7.5208in;height:.5104in" id="Picture_x0020_2" src="cid:image003.png@01D52298.C53313D0" alt="cid:image006.png@01D515A3.47EDD880"><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"><o:p> </o:p></p>
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<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Bishop, Bill <bbishop@pathfinder-ea.com> <br>
<b>Sent:</b> Thursday, June 13, 2019 2:00 PM<br>
<b>To:</b> Erik Kolderup <erik@kolderupconsulting.com>; Nicholas Caton <Nicholas.Caton@se.com><br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> RE: [Equest-users] Interpreting SIM reports - CHW plant improvements<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p><span style="color:red">[External email: Use caution with links and attachments]</span><o:p></o:p></p>
<div class="MsoNormal" align="center" style="text-align:center">
<hr size="2" width="100%" align="center">
</div>
<p> <o:p></o:p></p>
<div>
<p class="MsoNormal">Once you convert to DOE-2.3, you have additional sizing options and other CHW plant improvements. For example:<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3">For SIZING-OPTION, you can choose the COINCIDENT (simultaneous) peak load of all attached coils, or the NON-COINCIDENT total of all peak coil loads. (Or PRIMARY based on the attached
equipment capacities.)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3">The SIZING-WINDOW specifies how design-days are treated.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3">You can specify the design LOOP-FLOW (gpm) if already known.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3">You can specify the RATED-EDB and RATED-EWB for the corresponding coil ZONE:COOLING-CAPACITY.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3">You can specify a STARTUP-COOL-DT that sizes the cooling coil based on the space temperature reduction you have to achieve per hour of operation.<o:p></o:p></li></ul>
<p class="MsoNormal"><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>
<p class="MsoNormal"><b><span style="font-size:3.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></b></p>
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</span><i><span style="font-size:7.0pt;font-family:"Verdana",sans-serif;color:#00B0F0">Ask me why Carbon Fee & Dividend may be right for you.</span></i><span style="color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Equest-users <<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>>
<b>On Behalf Of </b>Erik Kolderup via Equest-users<br>
<b>Sent:</b> Thursday, June 13, 2019 2:08 PM<br>
<b>To:</b> Nicholas Caton <<a href="mailto:Nicholas.Caton@se.com">Nicholas.Caton@se.com</a>><br>
<b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Interpreting SIM reports<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">Hi, Nick. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">I think that the capacity of the cooling loop will be based on the sum of the capacities of cooling coils connected to the loop, assuming the sizing option for the loop is "secondary" rather than "primary".
If you look at the SV-A report and sum up capacity of all the cooling coils, does that get you to 13 MBtu/hr? If you want the loop sized based on chiller size, then the sizing option for the loop should be "primary". <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">-Erik<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>Erik Kolderup, PE, LEED AP</b><o:p></o:p></p>
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<p class="MsoNormal"><a href="mailto:erik@kolderupconsulting.com" target="_blank">erik@kolderupconsulting.com</a><span style="color:#999999"> | 415.531.5198 | </span><a href="https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.kolderupconsulting.com&data=02%7C01%7CNicholas.Caton%40se.com%7C099562f2a25d47f5dbbb08d6f0318c1a%7C6e51e1adc54b4b39b5980ffe9ae68fef%7C0%7C0%7C636960492936672346&sdata=ww6YPp5ddvs6QkXrOtBf0aRdpezDQKlkj6wRd57FSYg%3D&reserved=0" target="_blank">www.kolderupconsulting.com</a><span style="color:#999999"> </span><o:p></o:p></p>
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<p class="MsoNormal">On Thu, Jun 13, 2019 at 11:02 AM Nicholas Caton 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" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi everyone,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Can anyone help me assert or correct my understanding on something? This is from a model built in v3.65, b7175, doe2.2 engine (with intent to upconvert the project to doe2.3 before
I’m done).<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Report PV-A lists the capacity for each heating/cooling loop. Here I’m cropping to just the loops, and highlighting what I’m used to thinking of as the “peak” coincident capacity
requirement for a chilled water loop – 13.909 MMBtu/hr (that’s millions):<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<img border="0" width="925" height="384" style="width:9.6354in;height:4.0in" id="gmail-m_-3304755082402223738Picture_x0020_3" src="cid:image011.jpg@01D52298.C53313D0"><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">The following reports PS-H go into more detail on each item listed in PV-A. Here is the report for the same “Chilled Water Loop,” with a coule more highlights:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<img border="0" width="845" height="898" style="width:8.802in;height:9.3541in" id="gmail-m_-3304755082402223738Picture_x0020_7" src="cid:image012.png@01D52298.C53313D0"><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Immediately, I note that
<b><span style="color:red">13.909 MMBtu/hr</span></b><span style="color:red"> (1,159 tons)
</span>aligns with PV-A, however I do not see that number matching (intuitively) any of the other figures or sums provided on this sheet. The figure
<span style="background:yellow">5,625.126 kBtu/hr (469 tons)</span> aligns with my expectations for peak load on the loop, where nominal capacity of the associated chillers on this loop are in the same ballpark (one is 444 tons and one is 210 tons on paper
& @ design conditions, and I’m told they commonly do not need to engage the smaller chiller during the dead of summer).<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Can anyone help me reconcile the differences between what’s reported as “Cooling Capacity” in PV-A, in relation to the annual peak loads indicated for the same loop in the PS-H
report? <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thanks!<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">~Nick<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Arial",sans-serif;color:#3A7A46"><img border="0" width="726" height="9" style="width:7.5625in;height:.0937in" id="gmail-m_-3304755082402223738Picture_x0020_1" src="cid:image002.png@01D52298.C53313D0" alt="cid:image005.png@01D515A3.47EDD880"></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-family:"Arial",sans-serif;color:#3A7A46">Nick Caton, P.E., BEMP</span></b><o:p></o:p></p>
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