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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>How about changing the system type to VAV and adding the waterside
economizer coil? For instance, if the system type is supposed to be fan coils,
you could set the minimum fan speed to 1.00, minimum air fraction to 1.00, set
your minimal static pressure on the fan- maybe 0.25” or so, zero out the pressure
drop across the “economizer coil”, and zero out additional heat
gain from the fan due to the “economizer coil”.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Does anyone have experience with this methodology producing reliable
results compared to the methodology suggested in previous posts? Any feedback
is appreciated.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><b><font size=2 color="#777777" face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:#777777;font-weight:bold'>James
D. Waechter, P.E., LEED A.P.</span></font></b><o:p></o:p></p>
<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:black;font-weight:bold'>Beaudin
Ganze Consulting Engineers<o:p></o:p></span></font></b></p>
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size=1 color=gray><span style='font-size:9.0pt;color:gray'>Commissioning<o:p></o:p></span></font></p>
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face=Tahoma><span style='font-size:10.0pt;line-height:120%;font-family:Tahoma;
color:#5F5F5F'>303.278.3820 x 5246</span></font><o:p></o:p></p>
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bold;font-style:italic'><a href="http://www.bgce.com/"><font color=green><span
style='color:green'>Celebrating 10 Years of LEED CERTIFIED Design</span></font></a></span></font></u></i></b><b><i><font
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the environment before printing</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'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Fred Porter<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, July 28, 2008 3:53
PM<br>
<b><span style='font-weight:bold'>To:</span></b> Steve Mignogna; Brian Fountain<br>
<b><span style='font-weight:bold'>Cc:</span></b>
equest-users@lists.onebuilding.org; Marcus Eliason<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users]
waterside economizer in eQuest</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'>No, that's not required. If the WSE-"Chiller" is
listed with the chillers on a loop, DOE-2 will use it when conditions allow.
"Conditions" include CHW temperature, so reset up of CHW if possible
maximizes the modeled use of the WSE. <br>
<br>
>>> Brian Fountain <bfountain@greensim.com> 7/28/2008 2:12 PM
>>><br>
Further to this -- you will likely need to set up your equipment <br>
controls to specify the water economizer chiller type leading in the <br>
winter (below a certain OA) and the regular chillers leading above a <br>
certain OA -- or based on a schedule.<br>
<br>
Steve Mignogna wrote:<br>
> You can set up a separate chiller of type "water
economizer". This <br>
> will attach to your CHW and CW Loops and will bypass the chiller and <br>
> circulate through your cooling tower when the outside air conditions <br>
> are acceptable for free cooling.<br>
><br>
><br>
><br>
> On Fri, Jul 25, 2008 at 11:13 AM, Marcus Eliason <meliason@essexco.com <br>
> <mailto:meliason@essexco.com>> wrote:<br>
><br>
><br>
> Hello,<br>
><br>
> Can someone please explain the proper way to model
a waterside<br>
> economizer in<br>
> eQuest? I have found the option for a
cooling tower with HX, but<br>
> this does<br>
> not seem to yield any results.<br>
><br>
> Thank you,<br>
><br>
> Marcus Eliason<br>
> Essex Engineering Corporation<br>
> 404.365.9482<br>
> meliason@essexco.com
<mailto:meliason@essexco.com><br>
><br>
><br>
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><br>
><br>
><br>
><br>
> -- <br>
> Steve Mignogna<br>
> Atelier Ten<br>
> ------------------------------------------------------------------------<br>
><br>
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