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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The short answer would be no and no. I’m not aware
of any curve tools or libraries and in my experience if you want to use a
custom chiller curve you’ll have to build it yourself, with close work
with the manufacturer. To create custom chiller curves you need to have
data for the capacity and efficiency as a function of condenser water supply
and chilled water supply temperatures as well as the kW power draw as a function
of part load and LIFT conditions (Condenser Water Supply Temp – CHW Supply
Temp).<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'>This is all in regards to a variable-speed centrifugal water
cooled chiller, I’m not sure how different this would be for an air-cooled
chiller as I haven’t tried to use custom data for one yet.<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’ve attached a PDF of a sample of the data I had to
collect from the manufacturer in order to create a set of custom chiller curves.
Essentially I had to specify the conditions that I wanted efficiency and capacity
numbers for and then the manufacturer was able to use his selection program to
determine the numbers for me.<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'>Hope this helps,<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><span style='font-size:11.0pt;font-family:"Franklin Gothic Demi","sans-serif";
color:navy'>Robby Oylear,</span><span style='font-size:11.0pt;font-family:"Franklin Gothic Demi","sans-serif";
color:#004080'> </span><span style='font-size:11.0pt;font-family:"Franklin Gothic Demi","sans-serif";
color:navy'>LEED</span><span style='font-size:8.0pt;font-family:"Franklin Gothic Demi","sans-serif";
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color:#004080'><o:p></o:p></span></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:navy'>Mechanical Engineer<o:p></o:p></span></i></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:navy'>direct: 206.788.4571<o:p></o:p></span></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:navy'>cell: 206.354.2721<o:p></o:p></span></i></p>
<p class=MsoNormal><u><span style='font-size:7.5pt;font-family:"Arial","sans-serif";
color:blue'>www.</span></u><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#1F497D'><a href="http://www.rushingco.com/"
title="blocked::http://www.rushingco.com/"><span style='font-size:7.5pt'>rushingco.com</span></a></span><span
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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"'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Vikram
Sami<br>
<b>Sent:</b> Monday, December 08, 2008 7:35 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Chiller curves<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p><span style='font-family:"Calibri","sans-serif"'>Hi,</span><o:p></o:p></p>
<p><span style='font-family:"Calibri","sans-serif"'>Is there a chiller curve
tool/library out there for specific chillers in eQUEST? Also</span> <span
style='font-family:"Calibri","sans-serif"'>– can you create a curve with</span>
<span style='font-family:"Calibri","sans-serif"'>just the kW/ton and the NPLV?
What are the inputs I need to create a custom chiller curve?</span><o:p></o:p></p>
<p><b><span style='font-family:"Garamond","serif";color:black'>Vikram Sami,</span></b>
<span style='font-family:"Garamond","serif";color:black'>LEED AP</span><br>
<span style='font-family:"Garamond","serif";color:black'>Direct Phone
404-253-1466 | Direct Fax 404-253-1366</span> <o:p></o:p></p>
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