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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I seem to remember running into this before myself. I would
check the default curves for the DX vs. evaporative cooling. I think eQUEST
assumes a much worse partial-load performance for the evaporative curve. <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 style='margin-top:1.0pt'><b><span style='font-size:10.0pt;
font-family:"Verdana","sans-serif";color:#632423'>Nathan Miller, PE, LEED<sup>®</sup>AP<o:p></o:p></span></b></p>
<p class=MsoNormal><i><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";
color:black'>Senior Energy Engineer/Mechanical Engineer<o:p></o:p></span></i></p>
<p class=MsoNormal><i><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";
color:black'><o:p> </o:p></span></i></p>
<p class=MsoNormal style='line-height:115%'><b><span style='font-size:8.0pt;
line-height:115%;font-family:"Verdana","sans-serif";color:#632423'>D</span></b><span
style='font-size:8.0pt;line-height:115%;font-family:"Verdana","sans-serif";
color:#BFAB7F'> </span><span style='font-size:8.0pt;line-height:115%;
font-family:"Verdana","sans-serif";color:black'>206-788-4577</span><span
style='font-size:8.0pt;line-height:115%;font-family:"Verdana","sans-serif";
color:#BFAB7F'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><a href="http://www.rushingco.com/"><b><i><span
style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:#632423'>www.rushingco.com</span></i></b></a><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><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>Guoguang
Le<br>
<b>Sent:</b> Tuesday, September 14, 2010 5:41 PM<br>
<b>To:</b> Carol Gardner<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Question on eQuest Modeling DX Cooling, with
Bug?<o:p></o:p></span></p>
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<p class=MsoNormal><br>
Carol, I attched files for your review. If it is true, then eQuest has some
bugs.<o:p></o:p></p>
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<p class=MsoNormal>Thanks for your time.<o:p></o:p></p>
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<p class=MsoNormal>Best regards,<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal>James<br>
--- On <b>Mon, 9/13/10, Guoguang Le <i><jamesle_tx@yahoo.com></i></b>
wrote:<o:p></o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><br>
From: Guoguang Le <jamesle_tx@yahoo.com><br>
Subject: Re: [Equest-users] Question on eQuest Modeling DX Cooling, with Bug?<br>
To: "Carol Gardner" <cmg750@gmail.com><br>
Cc: equest-users@lists.onebuilding.org<br>
Date: Monday, September 13, 2010, 7:35 PM<o:p></o:p></p>
<div id=yiv245825581>
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<p class=MsoNormal>Hi Carol,<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<div>
<p class=MsoNormal>I have attached two inp files, one for Air cooled
condenser model with EER 9.9 and another one for Evap Cooled condenser with
EER 11.<o:p></o:p></p>
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<div>
<p class=MsoNormal> <o:p></o:p></p>
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<div>
<p class=MsoNormal>I created these files with eQuest Wizard mode. If
you move forward to detailed mode, you will find "Cooling Electric
Input Ratio" is 0.2911 btu/btu in EER 9.9 model and 0.2580 btu/btu in
EER 11 model. <o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<div>
<p class=MsoNormal>If you run simulation, the result for EER 9.9 air cooled
model is $242,752 and for evap Cooled model is $243,127. (I did not change
the data on "Cooling Electric Input Ratio".)<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal>If I change the data in the field of "Cooling
Electric Input Ratio" as 0.3444 for EER 9.9 air cooled model and
0.3100 for EER 11 evap cooled model. The result is $245,342 for EER 11 Evap
cooled model and $244,726 for EER 9.9 Air Cooled model.<o:p></o:p></p>
</div>
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<p class=MsoNormal> <o:p></o:p></p>
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<div>
<p class=MsoNormal>The conclusion is EER 11 evap cooled model is worse than
EER 9.9 air cooled model.<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal>Can you help figure it out?<o:p></o:p></p>
</div>
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<p class=MsoNormal>Best regards,<o:p></o:p></p>
</div>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal>James<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal>I believe that there are many Guru in the web. Thanks
for your time!<o:p></o:p></p>
</div>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><br>
--- On <b>Sun, 9/12/10, Carol Gardner <i><cmg750@gmail.com></i></b>
wrote:<o:p></o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><br>
From: Carol Gardner <cmg750@gmail.com><br>
Subject: Re: [Equest-users] Question on eQuest Modeling DX Cooling, with
Bug?<br>
To: "Guoguang Le" <jamesle_tx@yahoo.com><br>
Cc: equest-users@lists.onebuilding.org<br>
Date: Sunday, September 12, 2010, 9:11 PM<o:p></o:p></p>
<div id=yiv245825581yiv2112753993>
<p class=MsoNormal style='margin-bottom:12.0pt'>Not likely. Send a copy of
your .inp and .pd2 files for help.<br>
<br>
Carol<o:p></o:p></p>
<div>
<p class=MsoNormal>On Sun, Sep 12, 2010 at 6:10 PM, Guoguang Le <<a
href="http://us.mc501.mail.yahoo.com/mc/compose?to=jamesle_tx@yahoo.com"
target="_blank">jamesle_tx@yahoo.com</a>> wrote:<o:p></o:p></p>
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To all,<o:p></o:p></p>
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<p class=MsoNormal>I have two energy models on DX cooling for a same
building, one is with air cooled and another with evaporation cooling.
The EER is 9.9 for air cooled condenser and 11 for evaporation
cooled condenser. The final result I got is that it is the low cost
to run air cooled condenser DX with EER 9.9 than evaporation cooled
condenser DX with EER 11. I am wondering whether eQuest has bug or not.
Anyone could figure it out?<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Best regards,<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>James<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
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<div>
<p class=MsoNormal><br>
--- On <b>Sun, 9/12/10, <a
href="http://us.mc501.mail.yahoo.com/mc/compose?to=equest-users-request@lists.onebuilding.org"
target="_blank">equest-users-request@lists.onebuilding.org</a> <i><<a
href="http://us.mc501.mail.yahoo.com/mc/compose?to=equest-users-request@lists.onebuilding.org"
target="_blank">equest-users-request@lists.onebuilding.org</a>></i></b>
wrote:<o:p></o:p></p>
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From: <a
href="http://us.mc501.mail.yahoo.com/mc/compose?to=equest-users-request@lists.onebuilding.org"
target="_blank">equest-users-request@lists.onebuilding.org</a> <<a
href="http://us.mc501.mail.yahoo.com/mc/compose?to=equest-users-request@lists.onebuilding.org"
target="_blank">equest-users-request@lists.onebuilding.org</a>><br>
Subject: Equest-users Digest, Vol 30, Issue 19<br>
To: <a
href="http://us.mc501.mail.yahoo.com/mc/compose?to=equest-users@lists.onebuilding.org"
target="_blank">equest-users@lists.onebuilding.org</a><br>
Date: Sunday, September 12, 2010, 2:03 PM<o:p></o:p></p>
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When replying, please edit your Subject line so it is more specific<br>
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<p class=MsoNormal>Today's Topics:<br>
<br>
1. Re: eQUEST 3.64 - Modeling Procedures Quick
Reference Guide<br>
(Chris Jones)<br>
2. Re: eQUEST 3.64 - Modeling Procedures Quick
Reference Guide<br>
(Brian Fountain)<o:p></o:p></p>
</div>
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<p class=MsoNormal><br>
<br clear=all>
<br>
-- <br>
Carol Gardner PE<o:p></o:p></p>
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