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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I do have a question about that - point # 1 - A water-side
economizer cannot precool the return flow prior to entering the chillers. <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'>I might be showing my ignorance here, but - isn't that what the
cooling tower does? So if you have a CHW loop with two chillers attached - a
normal (lets say centrifugal) chiller and a water side economizer. When the
water side economizer cannot satisfy all the load, it would switch completely
to the centrifugal. However - wouldn't the cooling tower still be used as a
heat rejection to " precool the return flow prior to entering the chillers"?
In which case is point 1 not really a shortcoming?<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>
<div>
<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"'> Howe, Timothy
[mailto:Timothy.Howe@stantec.com] <br>
<b>Sent:</b> Monday, June 28, 2010 2:49 PM<br>
<b>To:</b> Sami, Vikram; Varkie C Thomas<br>
<b>Cc:</b> Sethi, Amarpreet; equest-users@lists.onebuilding.org; Jonathan Smith<br>
<b>Subject:</b> RE: [Equest-users] Waterside Economizer<o:p></o:p></span></p>
</div>
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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'>The only problem is this:<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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color:blue'><o:p> </o:p></span></p>
<div>
<div>
<p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:black'>Timothy Howe, MS, LEED® AP</span></b><span style='font-size:9.0pt;
font-family:"Arial","sans-serif";color:black'><br>
Mechanical Engineer<br>
Stantec<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:gray'>2060 Brighton-Henrietta Town Line Road<br>
Rochester NY 14623-2792<br>
Ph: (585) 413-5347<br>
Fx: (585) 272-1814<br>
Cell: (585) 330-8681<o:p></o:p></span></p>
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color:blue'><a href="http://www.stantec.com"><b><span style='color:#993333;
text-decoration:none'>stantec</span></b><span style='color:#003F6E;text-decoration:
none'>.com</span></a> <o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
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<p class=MsoNormal><span style='font-size:13.5pt;font-family:Webdings;
color:#008040'>ü</span><span style='color:blue'> </span><span
style='font-size:10.0pt;font-family:"Arial Narrow","sans-serif";color:#008040'>Please
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<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>Sami, Vikram<br>
<b>Sent:</b> Monday, June 28, 2010 2:44 PM<br>
<b>To:</b> Varkie C Thomas<br>
<b>Cc:</b> Sethi, Amarpreet; equest-users@lists.onebuilding.org; Jonathan Smith<br>
<b>Subject:</b> Re: [Equest-users] Waterside Economizer<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<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'>Which version of eQUEST are you using? If it's a new version
then you should be able to model it as a chiller. See attached documentation -
pg 68 (73 of the PDF)<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>
<div>
<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";
color:#1F497D'><o:p> </o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<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>Varkie
C Thomas<br>
<b>Sent:</b> Monday, June 28, 2010 1:08 PM<br>
<b>To:</b> Varkie C Thomas<br>
<b>Cc:</b> Sethi, Amarpreet; equest-users@lists.onebuilding.org; Jonathan Smith<br>
<b>Subject:</b> Re: [Equest-users] Waterside Economizer<o:p></o:p></span></p>
</div>
</div>
<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>
<p class=MsoNormal><br>
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