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<p class="MsoNormal">Hey guys,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve run into this exact scenario before – answer was to develop the calibrated eQuest model to quantify savings for all other ECM’s, then export the hourly loop loads, temperatures, and weather data (needed to model OA-resets & tower interactions),
into an 8760 spreadsheet model to wrap up the interactions with the WSE chiller.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Once built to a sufficient level of detail (At minimum: capture any TOU rate structures in play. Ideally if time allows, I would typically want to regress some custom performance curves, at least as detailed as what would be done in eQuest/doe2
if not more so… those regressions are relatively easy through Excel’s built in statistical analysis toolset), you can iteratively determine from your suggested starting point the logic resulting in a sweet spot for an optimal sequence of operations to minimize
energy and/or dollars spent. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sorry, that was a terrible sentence grammatically. Hope it was interpretable!<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"><span style="font-family:"Arial",sans-serif;color:#3A7A46"><img width="726" height="9" style="width:7.5625in;height:.0937in" id="Picture_x0020_1" src="cid:image001.png@01D46FAB.5B16F930"><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:8.0pt;font-family:"Arial",sans-serif;color:#626469"> Senior Energy Engineer</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#626469"> Regional Energy Engineering Manager<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#626469"> Energy and Sustainability Services</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#626469"> Schneider Electric</span><span style="color:#1F497D"><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:#57B069">D </span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#626469">913.564.6361
</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#57B069">M </span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#626469">785.410.3317
</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#57B069">F </span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#626469">913.564.6380</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#57B069">E </span><span style="color:#1F497D"><a href="mailto:nicholas.caton@schneider-electric.com"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#626469">nicholas.caton@schneider-electric.com</span></a><o:p></o:p></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:8.0pt;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="color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Equest-users <equest-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Daric Adair via Equest-users<br>
<b>Sent:</b> Wednesday, October 24, 2018 3:25 PM<br>
<b>To:</b> Chris Hadlock <cjhadlock@gmail.com>; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] sequencing chillers using Equipment Controls<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>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The issue is not with Equipment Controls but with the Water Side economizer ‘chiller’.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I thought the water side economizer was an all or nothing element, so your mention of Equipment Controls gave me hope that someone had found a way around this limitation. But I’m afraid it wouldn’t appear that’s true.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Per the Help files ‘ <a href="mk:@MSITStore:c:\eQUEST%203-65%20Data\Help\DOE22\DOE-2.chm::/Docs/volume2dictionary.htm">
Volume 2: Dictionary</a><span class="d2hbreadcrumbslinkseparator"> > </span><a href="mk:@MSITStore:c:\eQUEST%203-65%20Data\Help\DOE22\DOE-2.chm::/Docs/hvaccomponents.htm">HVAC Components</a><span class="d2hbreadcrumbslinkseparator"> >
</span><a href="mk:@MSITStore:c:\eQUEST%203-65%20Data\Help\DOE22\DOE-2.chm::/Docs/chiller1.htm">CHILLER</a>’ and ‘Chiller Water-Economizer’ :<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in;text-indent:-.25in">
The program assumes a water-side economizer is used in an “all or nothing” mode. If the water-side economizer can handle the entire cooling load, then it will be used. Otherwise, the loop will use its other chillers. A water-side economizer cannot precool the
return flow prior to entering the chillers.<br>
<br>
The “all or nothing” mode precludes the use of an EQUIP-CTRL sequence to coordinate the operation of an economizer chiller with other chillers. If you list a water-side economizer chiller in an EQUIP-CTRL sequence, it will be ignored.<o:p></o:p></p>
<p class="MsoNormal">…<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So, Sad day. Super creative – which is awesome and exciting. But can’t do it. bummer<span style="color:#44546A"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal" style="background:white"><b><span style="font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase">DARIC R ADAIR</span></b><span style="font-size:7.0pt;font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase">
PE, CEM, BEMP </span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#383A35"><br>
Mechanical Engineer, Energy Analyst <br>
<br>
</span><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#008C15;text-transform:uppercase">Henderson Engineers</span></b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#383A35"><br>
<b><span style="text-transform:uppercase">Tel</span></b> (913) 742-5530 <br>
<a href="mailto:daric.adair@hendersonengineers.com"><span style="color:#383A35">daric.adair@hendersonengineers.com</span></a><br>
<br>
</span><b><span style="font-size:7.0pt;font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase">Licensed in</span></b><span style="font-size:7.0pt;font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase"> KS</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#383A35"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>From:</b> Chris Hadlock <<a href="mailto:cjhadlock@gmail.com">cjhadlock@gmail.com</a>>
<br>
<b>Sent:</b> Tuesday, October 23, 2018 4:05 PM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] sequencing chillers using Equipment Controls<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">Hi All,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">I'm using eQuest version 3.65 and am having trouble with sequencing my chillers - I've combed through the archives but haven't found anything that has helped.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">I have 3 chillers in my model, a water-side economizing chiller and two air-cooled scroll chillers. I would like to control them such that my WS economizing chiller
runs up to a certain capacity only (175 Tons = 2.1 MBtu/h). Without any controls, eQuest is ignoring the capacity I have entered, and is meeting my building's entire cooling load. Beyond the 2.1 MBtu/h, I would like my 2 other chillers to run to meet the remaining
load. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">I've created an Equipment Control (and selected it on my CHW loop) that has my WS Econo Chiller as sequence no. 1 with a max load of 2.1 (I believe units of MBtu/h).
Then I have my other chillers as sequence 2/3 and left max loads as "999". I've played around with the "Max Load" values and also the "Loads Through" value and nothing I do changes the outcome. Is anyone able to help me figure out why eQuest is not capping
my WS Econo Chiller at the 2.1 MBtu/h and why it continues to meet the entire cooling load (with a peak approaching 4 MBtu/h)?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">Thank you in advance. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">---<br>
Chris Hadlock, </span><span style="font-size:8.0pt;font-family:"Tahoma",sans-serif;color:black"><a href="https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fm.a.sc%2F&data=02%7C01%7Cnicholas.caton%40schneider-electric.com%7C05000517d0c547b912c508d639eec3c6%7C6e51e1adc54b4b39b5980ffe9ae68fef%7C0%7C0%7C636760094982849898&sdata=O0yodzmEcs33D4X6WFOQqxn6qV43VPyK65cr3fUYoGI%3D&reserved=0" target="_blank">M.A.Sc</a>.,
P.Eng, LEED AP BD+C</span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><br>
Founder & Senior Energy Consultant<br>
<br>
</span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#888888">HADLOCK</span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"> CONSULTING<br>
201 Candlewood Cr<br>
Waterloo, ON N2L5T3<br>
tel: (519) 804-1223<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">cel: (226) 343-5599<br>
<a href="https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.hadlockconsulting.ca%2F&data=02%7C01%7Cnicholas.caton%40schneider-electric.com%7C05000517d0c547b912c508d639eec3c6%7C6e51e1adc54b4b39b5980ffe9ae68fef%7C0%7C0%7C636760094982849898&sdata=98O7QKAFQKODOjd4H27wgsliczPTIOn300BGMw8ruwA%3D&reserved=0" target="_blank">www.hadlockconsulting.ca</a><o:p></o:p></span></p>
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