<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:10pt">Vikram:<br><br>When defining a screw compressor in eQuest, I see three curves required.<br><br>1. EIR f(CHWT & ECT) which is the energy input ratio as a function of the evaporator leaving water temperature and the condenser water entering temperature. This is called lift. eQuest calls this DT.<br><br>2.Cap f(CHWT & ECT) which is the capacity as a function of lift.<br><br>3.EIR f(PLR & DT) which is the energy input ratio as a function of the part load ratio and the DT or chiller lift. <br><br>Creating a performance curve using the temperature difference between the condenser water entering and leaving temperature is incorrect. I think you realize this because your chiller energy went up 30%.<br><br>If you are modeling a constant chilled water supply
temperature you can plug that in as Independent 1 and use the condenser entering water temperature as Independent 2. If your chilled water temperature will be reset based on terminal load or outside air temperature, then you would need to get the chiller modeled by the manufacturer.<br><br>Paul Diglio<br><div><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 10pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> "Sami, Vikram" <Vikram.Sami@perkinswill.com><br><b><span style="font-weight: bold;">To:</span></b> "equest-users@lists.onebuilding.org" <equest-users@lists.onebuilding.org><br><b><span style="font-weight: bold;">Sent:</span></b> Wed, March 9, 2011 6:54:13 PM<br><b><span style="font-weight: bold;">Subject:</span></b> [Equest-users] Chiller curve ball<br></font><br>
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<p class="MsoNormal">Ok – so I’m probably doing this all wrong. </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I am trying to model a York scroll chiller in EQUEST. The
table below illustrates the Part Load rating Data</p>
<p class="MsoNormal"> </p>
<table class="MsoNormalTable" style="width: 384pt; border-collapse: collapse;" border="0" cellpadding="0" cellspacing="0" width="512">
<tbody><tr style="height: 40.5pt;">
<td style="width: 47.35pt; border: 1pt solid windowtext; padding: 0in 5.4pt; height: 40.5pt;" width="63">
<p class="MsoNormal" style="text-align: center;" align="center"><a rel="nofollow"><b><span style="font-size: 10pt; color: black;">Load % </span></b></a><b> </b><b></b></p>
</td>
<td style="width: 47.75pt; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 40.5pt;" width="64">
<p class="MsoNormal" style="text-align: center;" align="center"><b> </b><b><span style="font-size: 10pt; color: black;">Capacity (Tons) </span></b><b> </b></p>
</td>
<td style="width: 47.5pt; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 40.5pt;" width="63">
<p class="MsoNormal" style="text-align: center;" align="center"><b> </b><b><span style="font-size: 10pt; color: black;">Cond. EWT (°F) </span></b><b> </b></p>
</td>
<td style="width: 47.5pt; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 40.5pt;" width="63">
<p class="MsoNormal" style="text-align: center;" align="center"><b> </b><b><span style="font-size: 10pt; color: black;">Cond. LWT (°F) </span></b><b> </b></p>
</td>
<td style="width: 51.2pt; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 40.5pt;" width="68">
<p class="MsoNormal" style="text-align: center;" align="center"><b> </b><b><span style="font-size: 10pt; color: black;">Compressor kW </span></b><b> </b></p>
</td>
<td style="width: 47.4pt; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 40.5pt;" width="63">
<p class="MsoNormal" style="text-align: center;" align="center"><b>EER</b></p>
</td>
<td style="width: 47.4pt; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 40.5pt;" width="63">
<p class="MsoNormal" style="text-align: center;" align="center"><b>COP</b></p>
</td>
<td style="width: 47.9pt; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 40.5pt;" width="64">
<p class="MsoNormal" style="text-align: center;" align="center"><b>EIR</b></p>
</td>
</tr>
<tr style="height: 15pt;">
<td style="width: 47.35pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">100</p>
</td>
<td style="width: 47.75pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="64" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">135.8</p>
</td>
<td style="width: 47.5pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">85</p>
</td>
<td style="width: 47.5pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">95</p>
</td>
<td style="width: 51.2pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="68" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">104.1</p>
</td>
<td style="width: 47.4pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">15.6</p>
</td>
<td style="width: 47.4pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right"><span style="color: black;">4.6</span></p>
</td>
<td style="width: 47.9pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="64" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right"><span style="color: black;">0.217391</span></p>
</td>
</tr>
<tr style="height: 15pt;">
<td style="width: 47.35pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">83.3</p>
</td>
<td style="width: 47.75pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="64" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">116.8</p>
</td>
<td style="width: 47.5pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">79.4</p>
</td>
<td style="width: 47.5pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">87.9</p>
</td>
<td style="width: 51.2pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="68" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">81</p>
</td>
<td style="width: 47.4pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">17.3</p>
</td>
<td style="width: 47.4pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right"><span style="color: black;">5.1</span></p>
</td>
<td style="width: 47.9pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="64" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right"><span style="color: black;">0.196078</span></p>
</td>
</tr>
<tr style="height: 15pt;">
<td style="width: 47.35pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">66.7</p>
</td>
<td style="width: 47.75pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="64" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">96.9</p>
</td>
<td style="width: 47.5pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">73.5</p>
</td>
<td style="width: 47.5pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">80.4</p>
</td>
<td style="width: 51.2pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="68" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">60.1</p>
</td>
<td style="width: 47.4pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">19.3</p>
</td>
<td style="width: 47.4pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right"><span style="color: black;">5.7</span></p>
</td>
<td style="width: 47.9pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="64" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right"><span style="color: black;">0.175439</span></p>
</td>
</tr>
<tr style="height: 15pt;">
<td style="width: 47.35pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">50</p>
</td>
<td style="width: 47.75pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="64" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">73.5</p>
</td>
<td style="width: 47.5pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">66.7</p>
</td>
<td style="width: 47.5pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">71.8</p>
</td>
<td style="width: 51.2pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="68" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">41.7</p>
</td>
<td style="width: 47.4pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">21.2</p>
</td>
<td style="width: 47.4pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right"><span style="color: black;">6.2</span></p>
</td>
<td style="width: 47.9pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="64" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right"><span style="color: black;">0.16129</span></p>
</td>
</tr>
<tr style="height: 15pt;">
<td style="width: 47.35pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">33.3</p>
</td>
<td style="width: 47.75pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="64" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">48.2</p>
</td>
<td style="width: 47.5pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">65</p>
</td>
<td style="width: 47.5pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">68.4</p>
</td>
<td style="width: 51.2pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="68" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">26.6</p>
</td>
<td style="width: 47.4pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">21.7</p>
</td>
<td style="width: 47.4pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right"><span style="color: black;">6.4</span></p>
</td>
<td style="width: 47.9pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="64" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right"><span style="color: black;">0.15625</span></p>
</td>
</tr>
<tr style="height: 15pt;">
<td style="width: 47.35pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">16.7</p>
</td>
<td style="width: 47.75pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="64" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">23.6</p>
</td>
<td style="width: 47.5pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">65</p>
</td>
<td style="width: 47.5pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">66.6</p>
</td>
<td style="width: 51.2pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="68" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">13.1</p>
</td>
<td style="width: 47.4pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right">21.7</p>
</td>
<td style="width: 47.4pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="63" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right"><span style="color: black;">6.4</span></p>
</td>
<td style="width: 47.9pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0in 5.4pt; height: 15pt;" valign="bottom" width="64" nowrap="nowrap">
<p class="MsoNormal" style="text-align: right;" align="right"><span style="color: black;">0.15625</span></p>
</td>
</tr>
</tbody></table>
<p class="MsoNormal"> </p>
<p class="MsoNormal">eQUEST doesn’t seem to have a scroll chiller option –
I assume screw is the closest thing to it. </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">As far as I can tell – you need to define 3 performance
curves:</p>
<p class="MsoListParagraph" style=""><span style="">1.<span style="font: 7pt "Times New Roman";">
</span></span>A curve that defines the EIR based on the condenser
water temp</p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">"York
- Temp vs EIR" = CURVE-FIT </span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
TYPE = BI-QUADRATIC-T</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
INPUT-TYPE = DATA</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
INDEPENDENT-1 = ( 85, 79.4, 73.5, 66.7, 65, 65 )</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
INDEPENDENT-2 = ( 95, 87.9, 80.4, 71.8, 68.4, 66 )</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
DEPENDENT = ( 0.217391, 0.196, 0.175, 0.161, 0.156, 0.156 )</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);"> ..</span></p>
<p class="MsoListParagraph" style=""><span style="">2.<span style="font: 7pt "Times New Roman";">
</span></span>A curve that defines the part load based on the condenser
water temp</p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">"York
Temp vs Part Load" = CURVE-FIT </span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
TYPE = BI-QUADRATIC-T</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
INPUT-TYPE = DATA</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
INDEPENDENT-1 = ( 85, 79.4, 73.5, 66.7, 65, 65 )</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
INDEPENDENT-2 = ( 95, 87.9, 80.4, 71.8, 68.4, 66 )</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
DEPENDENT = ( 1, 0.833, 0.667, 0.5, 0.333, 0.167 )</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);"> ..</span></p>
<p class="MsoListParagraph" style=""><span style="">3.<span style="font: 7pt "Times New Roman";">
</span></span>A curve that defines the EIR based on the part load.</p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">"York
Part Load vs EIR" = CURVE-FIT </span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
TYPE = QUADRATIC</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
INPUT-TYPE = DATA</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
INDEPENDENT = ( 1, 0.833, 0.667, 0.5, 0.333, 0.167 )</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);">
DEPENDENT = ( 0.217, 0.196, 0.175, 0.161, 0.156, 0.156 )</span></p>
<p class="MsoNormal" style="margin-left: 1in;"><span style="color: rgb(192, 0, 0);"> ..</span></p>
<p class="MsoNormal" style="margin-left: 1in;"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">When I apply these curves to my chiller, my cooling energy
goes up by 30%. Seems like a lot. Is this reasonable or am I doing
something wrong with my curve selection?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Muchas Gracias in advance</p>
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