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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Angel,<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'>You <i>could</i> specify a chiller with a constant COP (EIR in
eQuest), but chillers don't operate that way. eQuest uses 3 curves to adjust
chiller performance with varying operating conditions:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>1. Chiller performance varies with changing condenser
conditions (dry bulb temp for air-cooled, condenser water temp for
water-cooled)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>2. Part load conditions (i.e. chiller efficiency is different
at 50% load than full load)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>3. The total capacity of the chiller varies with condenser
conditions as well<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'>The program comes with sets of curves for each of these, and
they are selected by default based on what you select for the chiller type.
Figure out (if you don't already know) the kW/ton of your chiller at ARI
conditions, and enter it into the appropriate screen in the wizard. Enter the
correct chiller type and let eQuest do the rest. If you have more specific chiller
performance data, you can create your own curves, but I have a feeling you
don't need to be that precise.<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:"Arial","sans-serif";
color:#1F497D'>Greg Collins</span></b><span style='color:#1F497D'><br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>GLUMAC | (949) 833-8190<o:p></o:p></span></p>
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<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"'> Angel pastor
[mailto:angel_p_f@yahoo.es] <br>
<b>Sent:</b> Wednesday, September 22, 2010 2:49 AM<br>
<b>To:</b> equest<br>
<b>Subject:</b> [Equest-users] chiller for LEED Base line building<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><span style='font-family:"Verdana","sans-serif"'>Hi e-quest
users:<br>
<br>
i have to model a chiller water condenser for my LEED Base line building, but a
have two questions i hope anyone can solve.<br>
1.- could this chiller be a constant COP (no curve)? or it must to associate
curves.<br>
2.- if the answer is the second case, which curves must be asociates with?<br>
<br>
thank you in advace<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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