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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'>Taylor Engineering has a great reference article on how to
regress chiller performance curves.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'><a
href="http://www.taylor-engineering.com/downloads/articles/ASHRAE%20Symposium%20AC-02-9-1%20Electric%20Chiller%20Model-Hydeman.pdf">http://www.taylor-engineering.com/downloads/articles/ASHRAE%20Symposium%20AC-02-9-1%20Electric%20Chiller%20Model-Hydeman.pdf</a><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'>For EnergyPlus, make sure you are using SI units (degrees C)
for the temperatures or the curves will not have the correct coefficients.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'>In order to regress the two biquadratic curves you will need
more than one full load performance point (at different, variable leaving water
and entering condenser water/ambient temperatures).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'>You can create a macro or use the Data Analysis Add-In Regression
function in Excel to perform the actual curve regressions from a compiled
number of data points.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'>EnergyPlus also comes with a database of chiller performance
including all three chiller performance curves for various manufacturers which
you may find useful. (Typical location is C:\EnergyPlusV6-0-0\DataSets\Chillers.idf)<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><strong><b><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>Elyse Malherek</span></font></b></strong><font
color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
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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'>763.553.5379 (Office)</span></font><font
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
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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'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>??<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, October 25, 2011
4:43 AM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">bldg-sim@lists.onebuilding.org</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] Chiller
Performance Curve</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face=SimSun><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 face=΢ÈíÑźÚ><span style='font-size:10.0pt;
font-family:\5FAE\8F6F\96C5\9ED1'>Dear all<span lang=ZH-CN>£»</span> <br>
</span></font><font size=2><span style='font-size:10.0pt'> </span></font><font
size=2 face=΢ÈíÑźÚ><span style='font-size:10.0pt;font-family:\5FAE\8F6F\96C5\9ED1'><br>
</span></font><font size=2 face=Arial><span style='font-size:10.0pt;font-family:
Arial'>Could you share with me about how to creat the chiller performance
curve?</span></font><font size=2 face=΢ÈíÑźÚ><span style='font-size:10.0pt;
font-family:\5FAE\8F6F\96C5\9ED1'><br>
</span></font><font size=2 face=Arial><span style='font-size:10.0pt;font-family:
Arial'>I received the part load performance data for the constant flow
centrifugal chiller from client as in the following table: </span></font><font
size=2 face=΢ÈíÑźÚ><span style='font-size:10.0pt;font-family:\5FAE\8F6F\96C5\9ED1'><o:p></o:p></span></font></p>
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=1088
style='width:816.0pt;border-collapse:collapse' u1:str>
<COLGROUP><COL style="WIDTH: 60pt" width=80><COL style="WIDTH: 86pt; mso-width-source: userset; mso-width-alt: 3242" span=2 width=114><COL style="WIDTH: 72pt; mso-width-source: userset; mso-width-alt: 2730" span=4 width=96><COL style="WIDTH: 71pt; mso-width-source: userset; mso-width-alt: 2673" width=94><COL style="WIDTH: 83pt; mso-width-source: userset; mso-width-alt: 3157" width=111><COL style="WIDTH: 71pt; mso-width-source: userset; mso-width-alt: 2673" span=2 width=94>
<tr height=21 style='height:15.75pt'>
<td width=80 rowspan=2 style='width:60.0pt;border:solid windowtext 1.0pt;
border-bottom:solid black 1.0pt;padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><font size=3 face=SimSun><span lang=ZH-CN
style='font-size:12.0pt'>¡¡</span><o:p></o:p></font></p>
</td>
<td width=115 height=21 style='width:86.0pt;border:none;border-top:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>Capacity</span></font><o:p></o:p></p>
</td>
<td width=211 colspan=2 height=21 style='width:158.0pt;border:solid windowtext 1.0pt;
border-right:solid black 1.0pt;padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>Evaporator</span></font><o:p></o:p></p>
</td>
<td width=192 colspan=2 height=21 style='width:2.0in;border-top:solid windowtext 1.0pt;
border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid black 1.0pt;
padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>Condensor</span></font><o:p></o:p></p>
</td>
<td width=96 height=21 bgcolor=silver style='width:1.0in;border-top:solid windowtext 1.0pt;
border-left:none;border-bottom:none;border-right:solid windowtext 1.0pt;
background:silver;padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>condensor-</span></font><o:p></o:p></p>
</td>
<td width=95 height=21 style='width:71.0pt;border-top:solid windowtext 1.0pt;
border-left:none;border-bottom:none;border-right:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>Primary POwer</span></font><o:p></o:p></p>
</td>
<td width=111 height=21 style='width:83.0pt;border:none;border-top:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=Calibri><span
style='font-size:10.0pt;font-family:Calibri'>Efficiency</span></font></b></strong><o:p></o:p></p>
</td>
<td width=95 height=21 style='width:71.0pt;border:none;border-top:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=SimSun><span lang=ZH-CN
style='font-size:10.0pt;font-family:SimSun'>¡¡</span></font></b></strong><o:p></o:p></p>
</td>
<td width=95 height=21 style='width:71.0pt;border-top:solid windowtext 1.0pt;
border-left:none;border-bottom:none;border-right:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=SimSun><span lang=ZH-CN
style='font-size:10.0pt;font-family:SimSun'>¡¡</span></font></b></strong><o:p></o:p></p>
</td>
</tr>
<tr height=21 style='height:15.75pt'>
<td height=21 style='border:none;border-bottom:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><font size=2 face=SimSun><span lang=ZH-CN
style='font-size:10.0pt'>¡¡</span></font><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:solid windowtext 1.0pt;
border-bottom:solid windowtext 1.0pt;border-right:none;padding:0in 0in 0in 0in;
height:15.75pt'>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>Leaving Temp</span></font><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:solid windowtext 1.0pt;
border-bottom:solid windowtext 1.0pt;border-right:none;padding:0in 0in 0in 0in;
height:15.75pt'>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>Entering Temp</span></font><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:solid windowtext 1.0pt;
border-bottom:solid windowtext 1.0pt;border-right:none;padding:0in 0in 0in 0in;
height:15.75pt'>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>Leaving Temp</span></font><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:solid windowtext 1.0pt;
border-bottom:solid windowtext 1.0pt;border-right:none;padding:0in 0in 0in 0in;
height:15.75pt'>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>Entering Temp</span></font><o:p></o:p></p>
</td>
<td height=21 bgcolor=silver style='border:solid windowtext 1.0pt;border-top:
none;background:silver;padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>evaporator</span></font><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;
border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><font size=2 face=SimSun><span lang=ZH-CN
style='font-size:10.0pt'>¡¡</span></font><o:p></o:p></p>
</td>
<td height=21 style='border:none;border-bottom:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=SimSun><span lang=ZH-CN
style='font-size:10.0pt;font-family:SimSun'>¡¡</span></font></b></strong><o:p></o:p></p>
</td>
<td height=21 style='border:none;border-bottom:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=SimSun><span lang=ZH-CN
style='font-size:10.0pt;font-family:SimSun'>¡¡</span></font></b></strong><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;
border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=SimSun><span lang=ZH-CN
style='font-size:10.0pt;font-family:SimSun'>¡¡</span></font></b></strong><o:p></o:p></p>
</td>
</tr>
<tr height=21 style='height:15.75pt'>
<td height=21 bgcolor="#CCFFCC" style='border:solid windowtext 1.0pt;
border-top:none;background:#CCFFCC;padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=Calibri><span
style='font-size:10.0pt;font-family:Calibri'>% Load</span></font></b></strong><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;
border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=Calibri><span
style='font-size:10.0pt;font-family:Calibri'>USRT</span></font></b></strong><o:p></o:p></p>
</td>
<td height=21 style='border:none;border-bottom:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=Calibri><span
style='font-size:10.0pt;font-family:Calibri'>Fahrenheit</span></font></b></strong><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:solid windowtext 1.0pt;
border-bottom:solid windowtext 1.0pt;border-right:none;padding:0in 0in 0in 0in;
height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=Calibri><span
style='font-size:10.0pt;font-family:Calibri'>Fahrenheit</span></font></b></strong><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:solid windowtext 1.0pt;
border-bottom:solid windowtext 1.0pt;border-right:none;padding:0in 0in 0in 0in;
height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=Calibri><span
style='font-size:10.0pt;font-family:Calibri'>Fahrenheit</span></font></b></strong><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:solid windowtext 1.0pt;
border-bottom:solid windowtext 1.0pt;border-right:none;padding:0in 0in 0in 0in;
height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=Calibri><span
style='font-size:10.0pt;font-family:Calibri'>Fahrenheit</span></font></b></strong><o:p></o:p></p>
</td>
<td height=21 bgcolor=silver style='border:solid windowtext 1.0pt;border-top:
none;background:silver;padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=Calibri><span
style='font-size:10.0pt;font-family:Calibri'>dT</span></font></b></strong><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;
border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=Calibri><span
style='font-size:10.0pt;font-family:Calibri'>kW</span></font></b></strong><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;
border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=Calibri><span
style='font-size:10.0pt;font-family:Calibri'>Efficiency</span></font></b></strong><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;
border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=Calibri><span
style='font-size:10.0pt;font-family:Calibri'>COP</span></font></b></strong><o:p></o:p></p>
</td>
<td height=21 bgcolor="#CCFFCC" style='border-top:none;border-left:none;
border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
background:#CCFFCC;padding:0in 0in 0in 0in;height:15.75pt'>
<p class=MsoNormal><strong><b><font size=2 face=Calibri><span
style='font-size:10.0pt;font-family:Calibri'>EIR</span></font></b></strong><o:p></o:p></p>
</td>
</tr>
<tr height=20 style='height:15.0pt'>
<td height=20 bgcolor="#CCFFCC" style='border:none;border-left:solid windowtext 1.0pt;
background:#CCFFCC;padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>100</span></font><o:p></o:p></p>
</td>
<td height=20 style='padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>600</span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-left:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>39.2</span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-left:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>48.2</span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-left:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>95</span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-left:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>86</span></font><o:p></o:p></p>
</td>
<td height=20 bgcolor=silver style='border:solid windowtext 1.0pt;border-top:
none;background:silver;padding:0in 0in 0in 0in;height:15.0pt' u1:num="46.8"
u1:fmla="=F4-C4">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>46.80 </span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-right:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>376</span></font><o:p></o:p></p>
</td>
<td height=20 style='padding:0in 0in 0in 0in;height:15.0pt'
u1:num="0.62666666666666671" u1:fmla="=H4/B4">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>0.627 </span></font><o:p></o:p></p>
</td>
<td height=20 style='padding:0in 0in 0in 0in;height:15.0pt'
u1:num="5.6119148936170209" u1:fmla="=B4/H4*3.5168">
<p class=MsoNormal><strong><b><font size=2 face=Calibri><span
style='font-size:10.0pt;font-family:Calibri'>5.612 </span></font></b></strong><o:p></o:p></p>
</td>
<td height=20 bgcolor="#CCFFCC" style='border:none;border-right:solid windowtext 1.0pt;
background:#CCFFCC;padding:0in 0in 0in 0in;height:15.0pt'
u1:num="0.17819229602669096" u1:fmla="=1/J4">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>0.178 </span></font><o:p></o:p></p>
</td>
</tr>
<tr height=20 style='height:15.0pt'>
<td height=20 bgcolor="#CCFFCC" style='border:none;border-left:solid windowtext 1.0pt;
background:#CCFFCC;padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>75</span></font><o:p></o:p></p>
</td>
<td height=20 style='padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>450</span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-left:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>39.2</span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-left:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>45.95</span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-left:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num="82.111999999999995">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>82.112</span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-left:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num="75.506">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>75.506</span></font><o:p></o:p></p>
</td>
<td height=20 bgcolor=silver style='border:solid windowtext 1.0pt;border-top:
none;background:silver;padding:0in 0in 0in 0in;height:15.0pt'
u1:num="36.305999999999997" u1:fmla="=F5-C5">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>36.31 </span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-right:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>246.6</span></font><o:p></o:p></p>
</td>
<td height=20 style='padding:0in 0in 0in 0in;height:15.0pt'
u1:num="0.54800000000000004" u1:fmla="=H5/B5">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>0.548 </span></font><o:p></o:p></p>
</td>
<td height=20 style='padding:0in 0in 0in 0in;height:15.0pt'
u1:num="6.417518248175182" u1:fmla="=B5/H5*3.5168">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>6.418 </span></font><o:p></o:p></p>
</td>
<td height=20 bgcolor="#CCFFCC" style='border:none;border-right:solid windowtext 1.0pt;
background:#CCFFCC;padding:0in 0in 0in 0in;height:15.0pt'
u1:num="0.15582347588717016" u1:fmla="=1/J5">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>0.156 </span></font><o:p></o:p></p>
</td>
</tr>
<tr height=20 style='height:15.0pt'>
<td height=20 bgcolor="#CCFFCC" style='border:none;border-left:solid windowtext 1.0pt;
background:#CCFFCC;padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>50</span></font><o:p></o:p></p>
</td>
<td height=20 style='padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>300</span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-left:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>39.2</span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-left:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>43.7</span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-left:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num="69.385999999999996">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>69.386</span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-left:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num="64.994">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>64.994</span></font><o:p></o:p></p>
</td>
<td height=20 bgcolor=silver style='border:solid windowtext 1.0pt;border-top:
none;background:silver;padding:0in 0in 0in 0in;height:15.0pt'
u1:num="25.793999999999997" u1:fmla="=F6-C6">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>25.79 </span></font><o:p></o:p></p>
</td>
<td height=20 style='border:none;border-right:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.0pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>158</span></font><o:p></o:p></p>
</td>
<td height=20 style='padding:0in 0in 0in 0in;height:15.0pt'
u1:num="0.52666666666666662" u1:fmla="=H6/B6">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>0.527 </span></font><o:p></o:p></p>
</td>
<td height=20 style='padding:0in 0in 0in 0in;height:15.0pt'
u1:num="6.6774683544303794" u1:fmla="=B6/H6*3.5168">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>6.677 </span></font><o:p></o:p></p>
</td>
<td height=20 bgcolor="#CCFFCC" style='border:none;border-right:solid windowtext 1.0pt;
background:#CCFFCC;padding:0in 0in 0in 0in;height:15.0pt'
u1:num="0.14975735517136793" u1:fmla="=1/J6">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>0.150 </span></font><o:p></o:p></p>
</td>
</tr>
<tr height=21 style='height:15.75pt'>
<td height=21 bgcolor="#CCFFCC" style='border-top:none;border-left:solid windowtext 1.0pt;
border-bottom:solid windowtext 1.0pt;border-right:none;background:#CCFFCC;
padding:0in 0in 0in 0in;height:15.75pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>25</span></font><o:p></o:p></p>
</td>
<td height=21 style='border:none;border-bottom:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.75pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>150</span></font><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:solid windowtext 1.0pt;
border-bottom:solid windowtext 1.0pt;border-right:none;padding:0in 0in 0in 0in;
height:15.75pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>39.2</span></font><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:solid windowtext 1.0pt;
border-bottom:solid windowtext 1.0pt;border-right:none;padding:0in 0in 0in 0in;
height:15.75pt' u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>41.45</span></font><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:solid windowtext 1.0pt;
border-bottom:solid windowtext 1.0pt;border-right:none;padding:0in 0in 0in 0in;
height:15.75pt' u1:num="67.298000000000002">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>67.298</span></font><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:solid windowtext 1.0pt;
border-bottom:solid windowtext 1.0pt;border-right:none;padding:0in 0in 0in 0in;
height:15.75pt' u1:num="64.994">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>64.994</span></font><o:p></o:p></p>
</td>
<td height=21 bgcolor=silver style='border:solid windowtext 1.0pt;border-top:
none;background:silver;padding:0in 0in 0in 0in;height:15.75pt'
u1:num="25.793999999999997" u1:fmla="=F7-C7">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>25.79 </span></font><o:p></o:p></p>
</td>
<td height=21 style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;
border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.75pt'
u1:num>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>101.8</span></font><o:p></o:p></p>
</td>
<td height=21 style='border:none;border-bottom:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.75pt' u1:num="0.67866666666666664"
u1:fmla="=H7/B7">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>0.679 </span></font><o:p></o:p></p>
</td>
<td height=21 style='border:none;border-bottom:solid windowtext 1.0pt;
padding:0in 0in 0in 0in;height:15.75pt' u1:num="5.181925343811395"
u1:fmla="=B7/H7*3.5168">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>5.182 </span></font><o:p></o:p></p>
</td>
<td height=21 bgcolor="#CCFFCC" style='border-top:none;border-left:none;
border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
background:#CCFFCC;padding:0in 0in 0in 0in;height:15.75pt'
u1:num="0.1929784652714589" u1:fmla="=1/J7">
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:10.0pt;
font-family:Calibri'>0.193 </span></font><o:p></o:p></p>
</td>
</tr>
</table>
<p class=MsoNormal><font size=2 face=΢ÈíÑźÚ><span style='font-size:10.0pt;
font-family:\5FAE\8F6F\96C5\9ED1'><br>
</span></font><font size=2><span style='font-size:10.0pt'> </span></font><font
size=2 face=΢ÈíÑźÚ><span style='font-size:10.0pt;font-family:\5FAE\8F6F\96C5\9ED1'><br>
</span></font><font size=2 face=Arial><span style='font-size:10.0pt;font-family:
Arial'>I searched on the internet and gained that there are three performance
curves for chiller, EIR_FPLR, EIR_FT and CAP _FT</span></font><font size=2
face=΢ÈíÑźÚ><span style='font-size:10.0pt;font-family:\5FAE\8F6F\96C5\9ED1'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt;
font-family:Calibri'>EIR_FPLR= a1+ b1 X PLR + c1 X PLR^2 <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt;
font-family:Calibri'>CAP_FT=a2 + b2 X t evap +c2 X t evap ^2 + d2 X tcond + e2
X tcond^2 + f2 X t evap X tcond <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt;
font-family:Calibri'>EIR_FT = a3 + b3 X t evap +c3 X t evap ^2 + d3 X
tcond + e3 X tcond^2 + f3 X t evap X tcond</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face=SimSun><span style='font-size:12.0pt'> </span></font><font
size=2 face=Calibri><span style='font-size:11.0pt;font-family:Calibri'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt;
font-family:Calibri'>So I created these three performance curve using
Bi-Quadratic curve type with Leaving Evaporator, Entering Condensor Temp ,
capacity , load and EIR as needed in the aboved equation.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=SimSun><span style='font-size:12.0pt'> </span></font><font
size=2 face=Calibri><span style='font-size:11.0pt;font-family:Calibri'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt;
font-family:Calibri'>I'm not sure whether it is correct, could you give me some
suggestions?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=SimSun><span style='font-size:12.0pt'> </span></font><font
size=2 face=Calibri><span style='font-size:11.0pt;font-family:Calibri'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt;
font-family:Calibri'>Any help will be appreiciated !<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=SimSun><span style='font-size:12.0pt'> </span></font><font
size=2 face=Calibri><span style='font-size:11.0pt;font-family:Calibri'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt;
font-family:Calibri'>Eleanor Shen <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=SimSun><span style='font-size:12.0pt'> </span></font><font
size=2 face=Calibri><span style='font-size:11.0pt;font-family:Calibri'><o:p></o:p></span></font></p>
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