<div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial">Hi, James,<div>I found that email! It really helps me out!</div><div>Thanks!</div><div>Esmi<br><br><br><br><br><div></div><div id="divNeteaseMailCard"></div><br>At 2013-04-22 21:13:29,"James Hess" <JHess@tmecorp.com> wrote:<br> <blockquote id="isReplyContent" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">FYI, email I sent on 4/7/13 at 10:12 PM CST shows how to verify COP is constant.<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">Thanks!<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;mso-fareast-language:EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Calibri","sans-serif";color:#339966;mso-fareast-language:EN-US"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#339966;mso-fareast-language:EN-US">JAH<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Calibri","sans-serif";color:#339966;mso-fareast-language:EN-US"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><i><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#339966;mso-fareast-language:EN-US">James A. Hess, PE, CEM, BEMP</span></i></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><br>
Energy Engineer<br>
TME, Inc.<br>
Little Rock, AR<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Mobile: (501) 351-4667<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"><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""> <a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Esmireta<br>
<b>Sent:</b> Sunday, April 21, 2013 11:55 PM<br>
<b>To:</b> Nick Caton<br>
<b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>; Erik Kolderup<br>
<b>Subject:</b> Re: [Equest-users] How to set the COP of a chiller as constant in eQuest?<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Dear Nick,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Thanks for your patient instruction!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">I now know how to set the COP of a chiller. But I also have two quesions:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">1 where to find the meaning of these parameters of the curve? Are them in the DOE help?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">2 How to verify that the COP is set as constant from the simulation output file of eQuest?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Thanks!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Esmi<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black"><br>
<br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black"><br>
At 2013-04-18 08:34:50,"Nick Caton" <<a href="mailto:ncaton@smithboucher.com">ncaton@smithboucher.com</a>> wrote:<br>
<br>
<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">Absolutely, and thanks for correcting me guys!
</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">All: Apologies for just throwing the concept out there without thinking it through totally. Here¡¯s
a fresh shot at the procedure with a more complete explanation, to make amends and reinforce the lesson for myself. I¡¯m wide open for corrections if I¡¯ve missed something =):</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">The typical function for determining a chiller¡¯s hourly energy consumption is:</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;color:black;letter-spacing:-.25pt">Elec<sub>hour</sub> = Cap<sub>hour</sub> * EIR * EIRf(t1,t2) * EIRf(PLR,dT) / 3413 Btu/Kw</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;color:black;letter-spacing:-.25pt"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">Erik¡¯s direction, setting only the ¡®b¡¯ coefficient to 1.0 and the rest to zero, turns
</span><span style="font-size:11.0pt;color:#002060;letter-spacing:-.25pt">EIRf(PLR,dT)
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">into a linear curve that will very simply return the PLR. This reduces the formula to:</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;color:black;letter-spacing:-.25pt">Elec<sub>hour</sub> = Cap<sub>hour</sub> * EIR * EIRf(t1,t2) * PLR / 3413 Btu/kW</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;color:black;letter-spacing:-.25pt"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060;letter-spacing:-.25pt">Following my original direction for coefficients, setting only ¡®a¡¯ to 1.0 and
the rest to zero, will turn EIRf(t1,t2) into a curve that will always return 1.0. This reduces the formula to:</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;color:black;letter-spacing:-.25pt">Elec<sub>hour</sub> = Cap<sub>hour</sub> * EIR * 1.0 * PLR / 3413 Btu/kW</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;color:black;letter-spacing:-.25pt"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">By their respective definitions in this context (see DOE2 entry below), (</span><span style="font-size:11.0pt;color:#002060;letter-spacing:-.25pt">Cap<sub>hour</sub>
* PLR)</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> equals the Hourly Load, in Btuh. The formula is therefore reduced to:</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;color:black;letter-spacing:-.25pt">Elec<sub>hour</sub> =
<span lang="ZH-CN">¡°</span>The Hourly Load (Btuh)<span lang="ZH-CN">¡±</span> * EIR * / 3413 Btu/kW</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">So now we are finally utilizing the input EIR every hour, as intended! Interesting to note, one
need not even touch the CAPf(t1,t2) curve as its effects are canceled out along the way.</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">~Nick</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">PS: ¡If all this is looking foreign, here¡¯s the DOE2 help entry I¡¯m starting from:</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"><img border="0" width="698" height="779" id="Picture_x0020_2" src="cid:5c5dd55$1$13e3c61d74c$Coremail$e2fye2$163.com"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img border="0" width="119" height="37" id="Picture_x0020_1" src="cid:145fa69$2$13e3c61d74d$Coremail$e2fye2$163.com" alt="cid:489575314@22072009-0ABB"></span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E"> </span></b><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-family:"Stylus BT","sans-serif";color:#2D4D5E">NICK CATON, P.E.</span></b><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#CC9900">SENIOR ENGINEER</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#CC9900"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">Smith & Boucher Engineers</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">25501 west valley parkway, suite 200</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">olathe, ks 66061</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">direct 913.344.0036</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">fax 913.345.0617</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="www.smithboucher.com" title="blocked::www.smithboucher.com"><span style="font-size:10.0pt">www.smithboucher.com</span></a></span><u><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:blue">
</span></u><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
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<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><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"">
<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Joe Huang<br>
<b>Sent:</b> Wednesday, April 17, 2013 6:56 PM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] How to set the COP of a chiller as constant in eQuest?</span><span style="color:black"><o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span style="color:black">Erik,<br>
<br>
You're right. It should be a straight diagonal line from 0,0 to 1,1. <br>
<br>
Joe<o:p></o:p></span></p>
<pre><span style="color:black">Joe Huang<o:p></o:p></span></pre>
<pre><span style="color:black">White Box Technologies, Inc.<o:p></o:p></span></pre>
<pre><span style="color:black">346 Rheem Blvd., Suite 108D<o:p></o:p></span></pre>
<pre><span style="color:black">Moraga CA 94556<o:p></o:p></span></pre>
<pre><span style="color:black"><a href="mailto:yjhuang@whiteboxtechnologies.com">yjhuang@whiteboxtechnologies.com</a><o:p></o:p></span></pre>
<pre><span style="color:black"><a href="http://www.whiteboxtechnologies.com">www.whiteboxtechnologies.com</a><o:p></o:p></span></pre>
<pre><span style="color:black">(o) (925)388-0265<o:p></o:p></span></pre>
<pre><span style="color:black">(c) (510)928-2683<o:p></o:p></span></pre>
<pre><span style="color:black">"building energy simulations at your fingertips"<o:p></o:p></span></pre>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"><br>
On 4/17/2013 3:43 PM, Erik Kolderup wrote: <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">Nick,<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">One point of correction regarding curves to provide constant COP... I'm pretty sure you do not want the EIR-FPLR curve to be constant 1.0. The value of
that curve is actually (normalized EIR)*(part load ratio). So if you want constant EIR, then the curve should just equal PLR. That's a straight line between (0,0) and (1,1). So the "a" coefficient should be zero and the "b" coefficient should be 1.0. All other
coefficients for that curve should be zero. <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">-Erik<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"><br clear="all">
<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="color:black">Erik Kolderup, PE, LEED AP</span></b><span style="color:black">
<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"><a href="mailto:erik@kolderupconsulting.com" target="_blank">erik@kolderupconsulting.com</a></span><span style="color:#999999"> |
<a href="tel:415.531.5198" target="_blank">415.531.5198</a> | </span><span style="color:black"><a href="http://www.kolderupconsulting.com" target="_blank">www.kolderupconsulting.com</a></span><span style="color:#999999"> </span><span style="color:black"><o:p></o:p></span></p>
</div>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span style="color:black"> <o:p></o:p></span></p>
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<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">---------- Forwarded message ----------<br>
From: Nick Caton <<a href="mailto:ncaton@smithboucher.com" target="_blank">ncaton@smithboucher.com</a>><br>
To: Joe Huang <<a href="mailto:yjhuang@whiteboxtechnologies.com" target="_blank">yjhuang@whiteboxtechnologies.com</a>>, Esmireta <<a href="mailto:e2fye2@163.com" target="_blank">e2fye2@163.com</a>><br>
Cc: "<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a>" <<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a>><br>
Date: Wed, 17 Apr 2013 19:40:31 +0000<br>
Subject: Re: [Equest-users] How to set the COP of a chiller as constant in eQuest?<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">After identifying the curves in play per Joe¡¯s suggestion, you could achieve a constant COP, independent
of part load or other variables, by making a set of custom curves (of appropriate/acceptable type) using coefficient inputs.
</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Example from the library:</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">CentH2O-EIR-fPLR&dT looks like this from the library before modification. This curve works alongside
others to determine how to modify the input EIR for a chiller:</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"><img border="0" width="645" height="349" id="_x0000_i1027" src="cid:356aa616$3$13e3c61d758$Coremail$e2fye2$163.com"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">What we want is for this and all the other curves to return a value of 1.0, whatever the hourly variables
throw at it. Simply enter all coefficients preceding a variable (b,c,d,e,f) to 0. Set the coefficient for the curve¡¯s constant (a) at 1.0:</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"><img border="0" width="641" height="339" id="_x0000_i1028" src="cid:6cbe09bf$4$13e3c61d759$Coremail$e2fye2$163.com"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Doing the same for all associated curves (again, read up in the help/documentation for your particular
equipment to be sure), at all hours the chiller in question will operate at the specified EIR without variance.</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">~Nick</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img border="0" width="119" height="37" id="_x0000_i1029" src="cid:145fa69$2$13e3c61d74d$Coremail$e2fye2$163.com" alt="cid:489575314@22072009-0ABB"></span><span style="color:black"><o:p></o:p></span></p>
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