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<title>eQuest Workaround for Water Economizers</title>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Tom, <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>In the equest/DOE new features manual,
there’s a section on “water economizer chillers”<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Basically, to run a cooling tower in water
economizer mode, you have to define a (virtual) water economizer chiller and
attach a cooling tower & condenser water loop to it. You’ll
need to set up the water econ chiller, water econ condenser loop, and water
econ cooling tower as *<b><span style='font-weight:bold'>completely</span></b>*
separate entities from any other chillers & cooling towers that you run and
have them attached to the primary chilled water loop in parallel with the other
chillers.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>You also may need to use schedules, equipment
controls, and load management of the chillers and circulation loops depending
on your exact plant configuration.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>For the water econ info, look under help/DOE2
help/Volume 6: New Features/Chiller Water Economizer<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hope this helps,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Steven<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 color=navy face="Bookman Old Style"><span
style='font-size:12.0pt;font-family:"Bookman Old Style";color:navy'>Steven
Savich, LEED AP</span></font><font color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Bookman Old Style"><span
style='font-size:10.0pt;font-family:"Bookman Old Style";color:navy'>Systems
West Engineers</span></font><font color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><st1:Street w:st="on"><st1:address w:st="on"><font size=2
color=navy face="Bookman Old Style"><span style='font-size:10.0pt;font-family:
"Bookman Old Style";color:navy'>411 High Street</span></font></st1:address></st1:Street><font
color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><st1:place w:st="on"><st1:City w:st="on"><font size=2
color=navy face="Bookman Old Style"><span style='font-size:10.0pt;font-family:
"Bookman Old Style";color:navy'>Eugene</span></font></st1:City><font size=2
color=navy face="Bookman Old Style"><span style='font-size:10.0pt;font-family:
"Bookman Old Style";color:navy'>, <st1:State w:st="on">OR</st1:State> <st1:PostalCode
w:st="on">97401-2427</st1:PostalCode></span></font></st1:place><font
color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Bookman Old Style"><span
style='font-size:10.0pt;font-family:"Bookman Old Style";color:navy'>(541)
342-7210</span></font><font color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Bookman Old Style"><span
style='font-size:10.0pt;font-family:"Bookman Old Style";color:navy'>(541)
342-7220 (fax)</span></font><o:p></o:p></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Tom O'Brien
[mailto:Tom@NorthernArchitects.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, September 18, 2009
7:56 AM<br>
<b><span style='font-weight:bold'>To:</span></b>
ssavich@systemswestengineers.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> eQuest Workaround for
Water Economizers</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=2 face="Optima LT"><span style='font-size:10.0pt;
font-family:"Optima LT"'>Steve -</span></font><o:p></o:p></p>
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font-family:"Optima LT"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face="Optima LT"><span style='font-size:10.0pt;
font-family:"Optima LT"'>I read your eQuest post today today regarding your
campus chilled water system / local cooling tower question. I'm afraid I
don't have a suggestion as I've not progressed that far with eQuest.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face="Optima LT"><span style='font-size:10.0pt;
font-family:"Optima LT"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face="Optima LT"><span style='font-size:10.0pt;
font-family:"Optima LT"'>However, you noted that "I’m familiar with
the equest workaround for water economizers". We've been stumped by
this in trying to set up a cooling tower / chiller combination that lets the
cooling tower act as a precooler for the air-cooled chillers and/or as the
cooling source when the building needs cooling in the winter months (our winter
months are plenty cold enough to handle the relatively low cooling needs we
have with a cooling tower without running the chillers). eQuest doesn't
seem to have a way to allow us to connect both the chillers and the cooling tower
to the chilled water piping. The typical eQuest cooling tower seems to
want to connect to the condenser water off the chillers and assumes the
chillers are water-cooled.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face="Optima LT"><span style='font-size:10.0pt;
font-family:"Optima LT"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face="Optima LT"><span style='font-size:10.0pt;
font-family:"Optima LT"'>Can you point me in the right direction to find the
find the workaround you mentioned?</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face="Optima LT"><span style='font-size:10.0pt;
font-family:"Optima LT"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face="Optima LT"><span style='font-size:10.0pt;
font-family:"Optima LT"'>Many Thanks.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face="Optima LT"><span style='font-size:10.0pt;
font-family:"Optima LT"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face="Optima LT"><span style='font-size:10.0pt;
font-family:"Optima LT"'>Tom</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
</span></font><font face="Optima LT"><span style='font-family:"Optima LT"'>Tom
O'Brien<br>
Northern Architects, Inc.<br>
<st1:Street w:st="on"><st1:address w:st="on">207 King Street Suite 3</st1:address></st1:Street><br>
<st1:place w:st="on"><st1:City w:st="on">Burlington</st1:City>, <st1:State
w:st="on">VT</st1:State> <st1:PostalCode w:st="on">05401</st1:PostalCode></st1:place><br>
T: 802-658-1953<br>
F: 802-658-2975<br>
E: Tom@NorthernArchitects.com</span></font><o:p></o:p></p>
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