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<p class="MsoNormal"><span style="color:#1F497D">Hi Kathryn,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">eQUEST has two types of water economizers:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Chillers of TYPE:WATER-ECONOMIZER<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Airside cooling coil SYSTEM:WS-ECONO accessible in System -> Cooling Tab -> Economizer Tab<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">The system-level water-side economizer is a coil attached to a condenser-water loop. That option is the one that is not currently implemented in DOE-2.3.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">The WATER-ECONOMIZER chiller is usable in DOE-2.3 and has updated capabilities in eQUEST 3.65.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">The error message shown below is common and can apply to any CHW coil – not just water economizers. The error is generated by a combination of system MIN-SUPPLY-T, fan SUPPLY-DELTA-T and FAN-PLACEMENT, and CHW
loop DESIGN-COOL-T.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">~Bill<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<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%"><b><i><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#002060">T: (585) 698-1956</span></i></b><b><i><span style="color:#002060">
</span></i></b><span style="color:#1F497D"> </span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#1F497D">F: (585) 325-6005</span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Kathryn Kerns via Equest-users<br>
<b>Sent:</b> Tuesday, November 14, 2017 7:47 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] How Does the Chiller Water Economizer Work by Itself?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Everyone, I am told that the water economizer function attached to the PVVT and other HVAC systems isn’t supported by eQuest anymore although it does appear to work and produce reasonable answers. Is this correct? If so is there some other
way of introducing a water economizer to a zone for cooling purposes? I have attached a *.inp file with a water tower, condenser loop, water economizer chiller, chw loop attached to a SZRH system in an interior zone with a 10 w/sqft process load and an 80
F cooling setpoint. It is computer server room. I want this cooling system to cool the interior space as much as possible but I can’t figure out to get the loops to even run, let alone cool. The error message that shows up is:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img border="0" width="605" height="224" id="Picture_x0020_1" src="cid:image012.jpg@01D37506.CA89FA10"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If there is no regular chiller, only the water economizer, does anybody know what condenser, chilled water loop and water economizer parameters you have to set to get this to work? Surely the model should run and cool the zone somewhat?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And can someone tell me why the water economizer function is not supported? It seems to work.
<o:p></o:p></p>
<p class="MsoNormal">I would really like to hear from the folks who supports the eQuest software because I find all this very confusing.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black">Kathryn Kerns</span></b><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif;color:#1F497D">Systems Specialist</span></b><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Times New Roman",serif;font-variant:small-caps;color:teal">BCE</span></b><b><span style="font-size:10.0pt;font-family:"Times New Roman",serif;font-variant:small-caps;color:teal">
</span></b><b><span style="font-size:12.0pt;font-family:"Times New Roman",serif;font-variant:small-caps;color:teal">Engineers, Inc.<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Times New Roman",serif;color:black">| Ph: 253.922.0446 | Fx: 253.922.0896 |</span></b><span style="font-size:7.0pt;font-family:"Times New Roman",serif;color:black">
<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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