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<div style="font-family: times new roman,new york,times,serif; font-size: 10pt;">Pasha:<br><br>I question you comment that scroll compressors are way less efficient than screw compressors. Can you explain what constitutes way less?<br><br>I looked up two air cooled Carrier chillers, both sized 140 tons. <br><br>The screw machine (30XA) has a full load EER of 10.6. The scroll (30RB) has a full load EER of 9.7.<br><br>The screw machine has an IPLV EER of 14.3 and a COP of 4.2. The scroll has a IPLV EER of 13.6 and a COP of 4.0.<br><br>Yes, the screw is slightly more efficient, but I can't see a 10-15% increase in energy usage especially since the IPLV EERs are so close.<br><br>Can you give an example of the EERs you have used for screws v. scrolls?<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> Pasha Korber-Gonzalez <pasha.pkconsulting@gmail.com><br><b><span style="font-weight: bold;">To:</span></b> Paul Diglio <paul.diglio@sbcglobal.net><br><b><span style="font-weight: bold;">Cc:</span></b> "Sami, Vikram" <Vikram.Sami@perkinswill.com>; "equest-users@lists.onebuilding.org" <equest-users@lists.onebuilding.org><br><b><span style="font-weight: bold;">Sent:</span></b> Thu, March 10, 2011 12:10:09 PM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [Equest-users] Chiller curve ball<br></font><br>
<div>Aside from the curve input data--wouldn't you expect to see at least a noticeable increase in chiller energy as Scroll chillers are WAY LESS Efficient than Screw chillers anwyay?</div>
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<div>Vik--if you are staring with a screw chiller profile and then are adjusting to represent scroll compressor systems I think you would expect to see some increase in chiller energy for your scroll compressors---and you probably have multiple scroll compressors where typically the screw chiller profiles are representing a single compressor unloading performance versus multiple compressors unloading on one machine...</div>
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<div>I agree that maybe 30% increase is out of whack, but my experience tells me that a 10-15% increase in compressor energy would not be out of line for scroll compressors and chillers versus screw chiller performance capabilities.</div>
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<div>I'm sorry I can't offer any help with the input of the curve data, my experience with custom curves is less than ideal (or successful). I have found that my attempts at using custom chiller curves yields too much questionability (& confusion on my end) and less than confident energy results with each manipulation of the eQuest equipment performance curves and variables.</div>
<div> </div>
<div>Pasha<br><br></div>
<div class="gmail_quote">On Wed, Mar 9, 2011 at 6:19 PM, Paul Diglio <span dir="ltr"><<a rel="nofollow" ymailto="mailto:paul.diglio@sbcglobal.net" target="_blank" href="mailto:paul.diglio@sbcglobal.net">paul.diglio@sbcglobal.net</a>></span> wrote:<br>
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<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>
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<b><span style="font-weight: bold;">From:</span></b> "Sami, Vikram" <<a rel="nofollow" ymailto="mailto:Vikram.Sami@perkinswill.com" target="_blank" href="mailto:Vikram.Sami@perkinswill.com">Vikram.Sami@perkinswill.com</a>><br><b><span style="font-weight: bold;">To:</span></b> "<a rel="nofollow" ymailto="mailto:equest-users@lists.onebuilding.org" target="_blank" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>" <<a rel="nofollow" ymailto="mailto:equest-users@lists.onebuilding.org" target="_blank" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>
<b><span style="font-weight: bold;">Sent:</span></b> Wed, March 9, 2011 6:54:13 PM
<div class="im"><br><b><span style="font-weight: bold;">Subject:</span></b> [Equest-users] Chiller curve ball<br></div></font>
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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 style="width: 384pt; border-collapse: collapse;" border="0" cellpadding="0" cellspacing="0" width="512">
<tbody>
<tr style="min-height: 40.5pt;">
<td style="border: 1pt solid windowtext; padding: 0in 5.4pt; min-height: 40.5pt; width: 47.35pt;" width="63">
<p style="text-align: center;" class="MsoNormal" align="center"><a rel="nofollow"><b><span style="color: black; font-size: 10pt;">Load % </span></b></a><b> </b><b></b></p></td>
<td style="border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext; padding: 0in 5.4pt; min-height: 40.5pt; width: 47.75pt;" width="64">
<p style="text-align: center;" class="MsoNormal" align="center"><b> </b><b><span style="color: black; font-size: 10pt;">Capacity (Tons) </span></b><b> </b></p></td>
<td style="border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext; padding: 0in 5.4pt; min-height: 40.5pt; width: 47.5pt;" width="63">
<p style="text-align: center;" class="MsoNormal" align="center"><b> </b><b><span style="color: black; font-size: 10pt;">Cond. EWT (°F) </span></b><b> </b></p></td>
<td style="border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext; padding: 0in 5.4pt; min-height: 40.5pt; width: 47.5pt;" width="63">
<p style="text-align: center;" class="MsoNormal" align="center"><b> </b><b><span style="color: black; font-size: 10pt;">Cond. LWT (°F) </span></b><b> </b></p></td>
<td style="border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext; padding: 0in 5.4pt; min-height: 40.5pt; width: 51.2pt;" width="68">
<p style="text-align: center;" class="MsoNormal" align="center"><b> </b><b><span style="color: black; font-size: 10pt;">Compressor kW </span></b><b> </b></p></td>
<td style="border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext; padding: 0in 5.4pt; min-height: 40.5pt; width: 47.4pt;" width="63">
<p style="text-align: center;" class="MsoNormal" align="center"><b>EER</b></p></td>
<td style="border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext; padding: 0in 5.4pt; min-height: 40.5pt; width: 47.4pt;" width="63">
<p style="text-align: center;" class="MsoNormal" align="center"><b>COP</b></p></td>
<td style="border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext; padding: 0in 5.4pt; min-height: 40.5pt; width: 47.9pt;" width="64">
<p style="text-align: center;" class="MsoNormal" align="center"><b>EIR</b></p></td></tr>
<tr style="min-height: 15pt;">
<td style="border-width: medium 1pt 1pt; border-style: none solid solid; padding: 0in 5.4pt; min-height: 15pt; width: 47.35pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">100</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.75pt;" valign="bottom" width="64" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">135.8</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.5pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">85</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.5pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">95</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 51.2pt;" valign="bottom" width="68" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">104.1</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.4pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">15.6</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.4pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right"><span style="color: black;">4.6</span></p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.9pt;" valign="bottom" width="64" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right"><span style="color: black;">0.217391</span></p></td></tr>
<tr style="min-height: 15pt;">
<td style="border-width: medium 1pt 1pt; border-style: none solid solid; padding: 0in 5.4pt; min-height: 15pt; width: 47.35pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">83.3</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.75pt;" valign="bottom" width="64" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">116.8</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.5pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">79.4</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.5pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">87.9</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 51.2pt;" valign="bottom" width="68" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">81</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.4pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">17.3</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.4pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right"><span style="color: black;">5.1</span></p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.9pt;" valign="bottom" width="64" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right"><span style="color: black;">0.196078</span></p></td></tr>
<tr style="min-height: 15pt;">
<td style="border-width: medium 1pt 1pt; border-style: none solid solid; padding: 0in 5.4pt; min-height: 15pt; width: 47.35pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">66.7</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.75pt;" valign="bottom" width="64" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">96.9</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.5pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">73.5</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.5pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">80.4</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 51.2pt;" valign="bottom" width="68" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">60.1</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.4pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">19.3</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.4pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right"><span style="color: black;">5.7</span></p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.9pt;" valign="bottom" width="64" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right"><span style="color: black;">0.175439</span></p></td></tr>
<tr style="min-height: 15pt;">
<td style="border-width: medium 1pt 1pt; border-style: none solid solid; padding: 0in 5.4pt; min-height: 15pt; width: 47.35pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">50</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.75pt;" valign="bottom" width="64" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">73.5</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.5pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">66.7</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.5pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">71.8</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 51.2pt;" valign="bottom" width="68" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">41.7</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.4pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">21.2</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.4pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right"><span style="color: black;">6.2</span></p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.9pt;" valign="bottom" width="64" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right"><span style="color: black;">0.16129</span></p></td></tr>
<tr style="min-height: 15pt;">
<td style="border-width: medium 1pt 1pt; border-style: none solid solid; padding: 0in 5.4pt; min-height: 15pt; width: 47.35pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">33.3</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.75pt;" valign="bottom" width="64" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">48.2</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.5pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">65</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.5pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">68.4</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 51.2pt;" valign="bottom" width="68" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">26.6</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.4pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">21.7</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.4pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right"><span style="color: black;">6.4</span></p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.9pt;" valign="bottom" width="64" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right"><span style="color: black;">0.15625</span></p></td></tr>
<tr style="min-height: 15pt;">
<td style="border-width: medium 1pt 1pt; border-style: none solid solid; padding: 0in 5.4pt; min-height: 15pt; width: 47.35pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">16.7</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.75pt;" valign="bottom" width="64" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">23.6</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.5pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">65</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.5pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">66.6</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 51.2pt;" valign="bottom" width="68" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right">13.1</p></td>
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<p style="text-align: right;" class="MsoNormal" align="right">21.7</p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.4pt;" valign="bottom" width="63" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" align="right"><span style="color: black;">6.4</span></p></td>
<td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; padding: 0in 5.4pt; min-height: 15pt; width: 47.9pt;" valign="bottom" width="64" nowrap="nowrap">
<p style="text-align: right;" class="MsoNormal" 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><span>1.<span style=""> </span></span>A curve that defines the EIR based on the condenser water temp</p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);">"York - Temp vs EIR" = CURVE-FIT </span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> TYPE = BI-QUADRATIC-T</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> INPUT-TYPE = DATA</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> INDEPENDENT-1 = ( 85, 79.4, 73.5, 66.7, 65, 65 )</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> INDEPENDENT-2 = ( 95, 87.9, 80.4, 71.8, 68.4, 66 )</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> DEPENDENT = ( 0.217391, 0.196, 0.175, 0.161, 0.156, 0.156 )</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> ..</span></p>
<p><span>2.<span style=""> </span></span>A curve that defines the part load based on the condenser water temp</p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);">"York Temp vs Part Load" = CURVE-FIT </span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> TYPE = BI-QUADRATIC-T</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> INPUT-TYPE = DATA</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> INDEPENDENT-1 = ( 85, 79.4, 73.5, 66.7, 65, 65 )</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> INDEPENDENT-2 = ( 95, 87.9, 80.4, 71.8, 68.4, 66 )</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> DEPENDENT = ( 1, 0.833, 0.667, 0.5, 0.333, 0.167 )</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> ..</span></p>
<p><span>3.<span style=""> </span></span>A curve that defines the EIR based on the part load.</p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);">"York Part Load vs EIR" = CURVE-FIT </span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> TYPE = QUADRATIC</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> INPUT-TYPE = DATA</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> INDEPENDENT = ( 1, 0.833, 0.667, 0.5, 0.333, 0.167 )</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> DEPENDENT = ( 0.217, 0.196, 0.175, 0.161, 0.156, 0.156 )</span></p>
<p style="margin-left: 1in;" class="MsoNormal"><span style="color: rgb(192, 0, 0);"> ..</span></p>
<p style="margin-left: 1in;" class="MsoNormal"> </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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