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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Varkie,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">I took a look at your model. I think the reason you are getting zero flow in your condenser loop is that you only have one chiller (the water side economizer).
When its not satisfying the whole load, it goes off, and there's no chiller to create loop demand (hence zero flow). If you add a chiller to the loop the error should go away.
<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" style="text-autospace:none"><b><span style="font-size:9.0pt;
font-family:"Arial","sans-serif";color:gray">Vikram Sami</span></b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray">, LEED AP<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;
font-family:"Arial","sans-serif";color:gray">Sustainable Design Analyst<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;
font-family:"Arial","sans-serif";color:gray">1382 Peachtree St. NE, Atlanta, GA 30309<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;
font-family:"Arial","sans-serif";color:gray">t: 404-443-7462 f:
</span><span lang="ES" style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray">404.892.5823 </span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray"> e: vikram.sami@perkinswill.com
</span><span style="font-size:11.0pt;font-family:
"Calibri","sans-serif";color:#1F497D"><a href="http://www.perkinswill.com/"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray;text-decoration:
none">www.perkinswill.com</span></a></span><span style="font-size:9.0pt;
font-family:"Arial","sans-serif";color:gray"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:3.0pt;text-autospace:none"><b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray">Perkins+Will.</span></b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray">
</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#ADD425">Ideas + buildings that honor the broader goals of society</span><span style="font-size:
9.0pt;font-family:"Arial","sans-serif";color:green"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Sethi, Amarpreet<br>
<b>Sent:</b> Monday, June 28, 2010 6:22 PM<br>
<b>To:</b> Varkie C Thomas<br>
<b>Cc:</b> equest-users@lists.onebuilding.org; Jonathan Smith<br>
<b>Subject:</b> Re: [Equest-users] Waterside Economizer<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:10.0pt;font-family:"Arial","sans-serif";
color:blue">Varkie,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue">You need the water economizer –<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue">"water economizer" = CHILLER
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"> TYPE = WATER-ECONOMIZER<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"> CHW-LOOP = "Chilled Water Loop"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"> CHW-PUMP = "WE pump"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"> CW-LOOP = "Condenser Water Loop" ..<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue">And a pump attached to the water economizer –<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue">"WE pump" = PUMP
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"> CAP-CTRL = VAR-SPEED-PUMP<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"> ..<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue">Along with the chilled water loop and a condenser water loop.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue">I think the problem you are facing may be due to the 42deg temperature input.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue">Hope this helps.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue">Amarpreet<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Varkie C Thomas [mailto:thomasv@iit.edu]
<br>
<b>Sent:</b> Monday, June 28, 2010 10:08 AM<br>
<b>To:</b> Varkie C Thomas<br>
<b>Cc:</b> Jonathan Smith; Sethi, Amarpreet; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Waterside Economizer<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif"">I am having a hard time getting
</span><span style="font-family:"Arial Unicode MS","sans-serif"">�</span><span style="font-family:"Calibri","sans-serif"">Chiller Type = Waterside Economizer</span><span style="font-family:"Arial Unicode MS","sans-serif"">�</span><span style="font-family:"Calibri","sans-serif"">
to work in eQ. I received 2 messages recommending this as the solution. I have 2 more saying that they have not been able to model WSE in eQ. Please let me know if it is not supposed to work.
<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif"">Unlike DOE2.1E this is the only minimum input required in eQ. In this project during WSE operation we require a Clg-Twr leaving temp (Plate & Frame HX entering temp) of 42F so that the CHW
temp leaving the HX is 44F or 46F. The eQ default is 85F. Even with this default and
</span><span style="font-family:"Arial Unicode MS","sans-serif"">�</span><span style="font-family:"Calibri","sans-serif"">Chiller Type = Waterside Economizer</span><span style="font-family:"Arial Unicode MS","sans-serif"">�</span><span style="font-family:"Calibri","sans-serif"">
I get the error message </span><span style="font-family:"Arial Unicode MS","sans-serif"">�</span><span style="font-family:"Calibri","sans-serif"">Condenser Water Loop has Zero Design Flow</span><span style="font-family:"Arial Unicode MS","sans-serif"">�</span><span style="font-family:"Calibri","sans-serif"">.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif"">Unlike DOE2.1E there is no way of attaching a schedule for WSE operation. I have attached eQ input-output
</span><span style="font-family:"Arial Unicode MS","sans-serif"">�</span><span style="font-family:"Calibri","sans-serif"">Without-WSE-1</span><span style="font-family:"Arial Unicode MS","sans-serif"">�</span><span style="font-family:"Calibri","sans-serif"">
and </span><span style="font-family:
"Arial Unicode MS","sans-serif"">�</span><span style="font-family:"Calibri","sans-serif"">With-WSE-2</span><span style="font-family:"Arial Unicode MS","sans-serif"">�</span><span style="font-family:"Calibri","sans-serif"">;
DOE2.1E definitions of WSE commands and keywords; a sample DOE2.1E plant section input showing WSE; a schematic of Plate & Frame HX; and my eQ input for WSE and the resulting error message. The attached project is dummy to test eQ for WSE.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif"">Has anyone modeled WSE with eQ? WSE works with DOE2.1E commands and keywords. Does Waterside Economizer work with EnergyPlus (this project is also going to be modeled with E+ using Design-Builder
interface for building and systems), TRACE or HAP</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif"">Varkie</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <span style="font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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