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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I retained the case numbers from the default DOE-2 expression for MIN-FLOW-RATIO below. The switch statement is based on symbol values according to the symbol
table for system TYPE. The symbol tables are found in a file called BDLKEY.OUT which, for eQUEST 3-65, is found in Documents -> eQUEST 3-65 Data -> DOE-2.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">A short cut to determining which case numbers to use with switch statements is to enter a user expression for an appropriate keyword. For system TYPE, you could
enter, “#SV(#P("TYPE"))” as a user expression for a zone keyword such as MIN-FLOW/AREA to see which symbol value matches the zone’s system type.<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">~Bill<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>
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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"> Daric Adair [mailto:Daric.Adair@hei-eng.com]
<br>
<b>Sent:</b> Tuesday, October 25, 2016 4:23 PM<br>
<b>To:</b> Bishop, Bill <bbishop@pathfinder-ea.com>; Darryl Kasun <darryl.kasun@gmail.com><br>
<b>Subject:</b> RE: [Equest-users] Airflow Schedule based on Occupancy<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Bill;<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">Can you expand/explain where the “case #” / “case ##” elements come from/are defined (help files, manual?). I can’t seem to place my finger on where they are….thanks!<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>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;text-transform:uppercase"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Black",sans-serif;color:black;text-transform:uppercase">DARIC R. ADAIR</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#1F497D">
</span><span style="font-size:8.0pt;font-family:"Arial Black",sans-serif;color:black;text-transform:uppercase"> PE, C.E.M.</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#1F497D">
<br>
</span><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#566C11">Henderson Engineers, Inc. | </span></b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#566C11">Mechanical Engineer, Energy Analyst</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#1F497D">
<br>
</span><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;font-variant:small-caps;color:black">dir</span></b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black"> 913 742 5530
<b><span style="font-variant:small-caps">tel</span></b> 913 742 5000 <b><span style="font-variant:small-caps">fax</span></b> 913 742 5001
<b><span style="font-variant:small-caps">tx id</span></b> #F-001236 <b><span style="font-variant:small-caps">email</span></b> daric.adair@hei-eng.com</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#1F497D">
<a href="http://www.hei-eng.com/"><b><span style="font-size:8.0pt;color:#566C11">www.hei-eng.com</span></b></a>
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</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">Licensed in KS.</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#1F497D"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><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"> Bishop, Bill via Equest-users [<a href="mailto:equest-users@lists.onebuilding.org">mailto:equest-users@lists.onebuilding.org</a>]
<br>
<b>Sent:</b> Tuesday, October 25, 2016 1:41 PM<br>
<b>To:</b> Darryl Kasun <<a href="mailto:darryl.kasun@gmail.com">darryl.kasun@gmail.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] Airflow Schedule based on Occupancy<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi Darryl,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">First, I would use a user expression for ZONE: MIN-FLOW-RATIO for any zones that you want to control to 6 ACH minimum. Then I would create and apply a ZONE: MIN-FLOW-SCH
with values of 1.0 during occupied hours and -999 for unoccupied hours. The expression below for MIN-FLOW-RATIO should give you 6 ACH . It will give you an error if a value is entered for ASSIGNED-FLOW that is less than 6 ACH.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">~Bill<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">/* This expression for ZONE:MIN-FLOW-RATIO calculates and enters<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> a value based on a desired minimum ACH. */<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">if (#P("MIN-CFM-RATIO") == unused)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> then unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> else switch #SV(#P("TYPE"))<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> case 2 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> case 17 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> case 19 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> case 26 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> case 27 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> case 28 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> case 29 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> default : if (#RV(#L("AIR-CHANGES/HR")) == 0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> .AND. #L("AIR-CHANGES/HR") = 6) then 1 $ 6 ACH<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> else if (#RV(#L("ASSIGNED-FLOW")) == 0) then<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> 6*#LR("SPACE","HEIGHT")*#LR("SPACE","AREA")/60/#L("ASSIGNED-FLOW")<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> else no_default endif<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> endif<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> endswitch<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> endif<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: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;color:blue">bbishop@pathfinder-ea.com</span></a></span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black">
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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"><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 [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Darryl Kasun via Equest-users<br>
<b>Sent:</b> Tuesday, October 25, 2016 1:54 PM<br>
<b>To:</b> equest <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>
<b>Subject:</b> [Equest-users] Airflow Schedule based on Occupancy<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi everyone,<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 have a zone that is served by a VAV system. The controls for the zone state that when the zone is occupied, the VAV box should be fully opened and when unoccupied, the zone supply air be reduced to 6 ACH. There are multiple zones controlled
in this manner.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">To model this I am thinking of creating a min airflow schedule that matches occupancy schedule. The minimum hourly fraction within the min airflow schedule would be equivalent to the airflow fraction of 6 ACH.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">In other words, if there are hourly fractions in the min airflow schedule (which is a copy of the occupancy schedule) that are below the equivalent fraction of 6 ACH, those hours would be changed to the 6 ACH fraction.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hopefully that makes sense to you.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">This method seems fine to me but a bit tedious as it will require developing multiple min airflow schedules.<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 thoughts?<o:p></o:p></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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