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<p class="MsoNormal">It’s gonna be a good week!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sequencing chiller based on outdoor temperature.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Behold, a dummy model wherein I’ve entered detailed mode and changed the default names for a pair of chillers to something easy to copy a few times here:<o:p></o:p></li></ol>
<p class="MsoListParagraph"><img width="872" height="461" style="width:9.0833in;height:4.802in" id="Picture_x0020_3" src="cid:image001.png@01D62764.A51DBA10"><o:p></o:p></p>
<ol style="margin-top:0in" start="2" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1"><b>Prompt: I want CH-A to handle the loop for all conditions where the outdoor drybulb temperature is less than or equal to 85F. I want CH-B only to handle the loop at all other
times.<o:p></o:p></b></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Looking downwards in my component tree, while in the water-side HVAC tab, I observe an empty component group entitled “Equipment Control.” Right-click that, and “Create Equipment
Control…”<o:p></o:p></li></ol>
<p class="MsoListParagraph"><img width="914" height="682" style="width:9.5208in;height:7.1041in" id="Picture_x0020_4" src="cid:image005.png@01D62765.047B54E0"><o:p></o:p></p>
<ol style="margin-top:0in" start="4" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">At the prompt, give this Equipment Control a name that reflects your intent in the moment. Choose the Control Type based on the kind of equipment you are trying to control (reference
article pasted here for convenience), and select a Loop to which this applies if prompted as well:<o:p></o:p></li></ol>
<p class="MsoListParagraph"><img width="633" height="260" style="width:6.5937in;height:2.7083in" id="Picture_x0020_18" src="cid:image009.png@01D6276E.4B1743B0"><o:p></o:p></p>
<p class="MsoListParagraph"><img width="830" height="330" style="width:8.6458in;height:3.4375in" id="Picture_x0020_6" src="cid:image007.png@01D62765.9F422260"><o:p></o:p></p>
<ol style="margin-top:0in" start="5" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Navigate to the Load Range 1 tab, select CH-A in the first dropdown, and enter nothing for the capacity (which is interpreted by the program to mean there is no limit on this first
phase of operation. Note that I did not also list CH-B, so this should effectively isolate operation to only CH-A while this EQUIP-CTRL is active.<o:p></o:p></li></ol>
<p class="MsoListParagraph" style="margin-left:1.0in"><img width="737" height="276" style="width:7.677in;height:2.875in" id="Picture_x0020_19" src="cid:image018.png@01D6276B.A6D10B30"><o:p></o:p></p>
<ol style="margin-top:0in" start="6" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">A general aside: For any other real-world sequence with more complex elements like multiple chillers/boilers/etc running at the same time… I can’t write a quick/simple guide for something
that broad, but you’d be well advised to skim the reference materials under <a href="mk:@MSITStore:C:\Users\sesa399002\Documents\eQUEST%203-65-7175%20Data\Help\DOE23\DOE-2.chm::/Docs/volume2dictionary.htm">
Volume 2: Dictionary</a><span class="d2hbreadcrumbslinkseparator"> > </span><a href="mk:@MSITStore:C:\Users\sesa399002\Documents\eQUEST%203-65-7175%20Data\Help\DOE23\DOE-2.chm::/Docs/hvaccomponents.htm">HVAC Components</a><span class="d2hbreadcrumbslinkseparator">
> </span><a href="mk:@MSITStore:C:\Users\sesa399002\Documents\eQUEST%203-65-7175%20Data\Help\DOE23\DOE-2.chm::/Docs/equipctrl1.htm">EQUIP-CTRL</a><span class="d2hbreadcrumbslinkseparator"> … and specifically
</span><a href="mk:@MSITStore:C:\Users\sesa399002\Documents\eQUEST%203-65-7175%20Data\Help\DOE23\DOE-2.chm::/Docs/volume2dictionary.htm">Volume 2: Dictionary</a><span class="d2hbreadcrumbslinkseparator"> >
</span><a href="mk:@MSITStore:C:\Users\sesa399002\Documents\eQUEST%203-65-7175%20Data\Help\DOE23\DOE-2.chm::/Docs/hvaccomponents.htm">HVAC Components</a><span class="d2hbreadcrumbslinkseparator"> >
</span><a href="mk:@MSITStore:C:\Users\sesa399002\Documents\eQUEST%203-65-7175%20Data\Help\DOE23\DOE-2.chm::/Docs/equipctrl1.htm">EQUIP-CTRL</a><span class="d2hbreadcrumbslinkseparator"> >
</span><a href="mk:@MSITStore:C:\Users\sesa399002\Documents\eQUEST%203-65-7175%20Data\Help\DOE23\DOE-2.chm::/Docs/typecooling.htm">TYPE = COOLING</a> for sequencing chillers
<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Now back out of these inputs, right click the freshly created EQUIP-CTRL in the component tree, and copy it. Give it a distinct name and change the CH-A assignment to CH-B:<o:p></o:p></li></ol>
<p class="MsoListParagraph"><img border="0" width="738" height="553" style="width:7.6875in;height:5.7604in" id="Picture_x0020_20" src="cid:image006.png@01D6276B.F82EF820"><o:p></o:p></p>
<ol style="margin-top:0in" start="8" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Now we just need to define under which circumstances we should use either EQUIP-CTRL. Right click the empty component group “Load Management” in the component tree, and the first
prompt will allow you to name and select a load management type. If you select OA Temperature, you’ll be prompted to provide a temperature to correspond with your first sequence. You can more descriptively think of this as “the maximum temperature for the
first range of operation.” Once again, if it’s initially unclear you can always change this stuff up later.<o:p></o:p></li></ol>
<p class="MsoListParagraph"><img border="0" width="463" height="319" style="width:4.8229in;height:3.3229in" id="Picture_x0020_12" src="cid:image012.png@01D62768.CACF17A0"><o:p></o:p></p>
<p class="MsoListParagraph"><img border="0" width="442" height="141" style="width:4.6041in;height:1.4687in" id="Picture_x0020_21" src="cid:image008.png@01D6276B.F82EF820"><o:p></o:p></p>
<ol style="margin-top:0in" start="9" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Click through your management sequence tabs, and select your EQUIP-CTRL intended for each range of temperatures. Once again, there are a lot of input options available to accommodate
a diversity of sequence intents, worthy of review pretty much anytime you are engaging these input dialogs, but for this prompt our lives are pretty simple:<o:p></o:p></li></ol>
<p class="MsoListParagraph"><img border="0" width="746" height="561" style="width:7.7708in;height:5.8437in" id="Picture_x0020_22" src="cid:image015.png@01D6276B.F82EF820"><o:p></o:p></p>
<p class="MsoListParagraph"><img border="0" width="740" height="558" style="width:7.7083in;height:5.8125in" id="Picture_x0020_23" src="cid:image020.png@01D6276B.F82EF820"><o:p></o:p></p>
<ol style="margin-top:0in" start="10" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">We’re almost done! This is probably the most universally important step. Any time you mess with EQUIP-CTRL and LOAD-MANAGEMENT, I’d advise it’s easy enough for anybody to get turned
around with the input options at-hand. Set up a custom hourly report to track the operations of the targeted equipment, to help yourself verify intent and tweak inputs as necessary down the line. I’m skipping through those steps as it’s something I and others
have covered many times before on the lists (see archives if needed). In this case, I’m just going to generate two columns of chiller loading alongside the hourly OADB conditions:<o:p></o:p></li></ol>
<p class="MsoListParagraph"><img border="0" width="804" height="213" style="width:8.375in;height:2.2187in" id="Picture_x0020_17" src="cid:image013.png@01D6276A.6458B4C0"><o:p></o:p></p>
<ol style="margin-top:0in" start="11" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Simulate and export custom hourly report to confirm results/intent. Spend a little time here to make the visual pretty / intuitive as it probably belongs in an imaginary report somewhere…
this is where we earn our keep after all ;-)<o:p></o:p></li></ol>
<p class="MsoListParagraph"><img border="0" width="1582" height="577" style="width:16.4791in;height:6.0104in" id="Picture_x0020_24" src="cid:image010.png@01D6276E.4B1743B0"><o:p></o:p></p>
<p class="MsoListParagraph">In this case I’m using pivot chart/table to quickly slice down to the first week of June, where I can observe weather conditions that should trigger between CH-A and CH-B. Seems satisfactory to me!<o:p></o:p></p>
<p class="MsoListParagraph"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I hope this helps you and others dipping your toes into sequencing with eQuest! This is a relatively deep rabbit hole / skillset, but your prompt felt like an appropriately simple enough sequence to set up an introductory example for
the community… Thanks for asking!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">~Nick<o:p></o:p></p>
<p class="MsoListParagraph"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#3A7A46"><img border="0" width="624" height="8" style="width:6.5in;height:.0833in" id="Picture_x0020_1" src="cid:image011.jpg@01D6276E.4B1743B0"><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<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:4.5pt"><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
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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>
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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"><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>
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<p class="MsoNormal"><b>From:</b> Equest-users <equest-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Arnab Saha via Equest-users<br>
<b>Sent:</b> Sunday, May 10, 2020 1:37 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Chiller sequencing with respect to outdoor temperature<o:p></o:p></p>
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<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>
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<p> <o:p></o:p></p>
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<p class="MsoNormal">Dear equest users, <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 am currently modelling an adiabatic chiller for large commercial complex.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">For this particular design, I need to do load management and chiller sequencing between air cooled and water cooled chiller on basis of outdoor air temperature. <o:p></o:p></p>
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<p class="MsoNormal">Please provide a suitable path for this modelling. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Regards <o:p></o:p></p>
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<p class="MsoNormal">ARNAB SAHA <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><br>
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