<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
@font-face
{font-family:"Wingdings 2";
panose-1:5 2 1 2 1 5 7 7 7 7;}
@font-face
{font-family:"Century Gothic";
panose-1:2 11 5 2 2 2 2 2 2 4;}
@font-face
{font-family:"Stylus BT";
panose-1:2 14 4 2 2 2 6 2 3 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";
color:black;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0in;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";
color:black;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";
color:black;}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:Consolas;
color:black;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";
color:black;}
span.EmailStyle21
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.EmailStyle22
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body bgcolor="white" lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Another point that might help some folks who are trying to model constant chiller COPs:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I needed to use the existing district plant method for a local utility rebate recently, and by inspecting the PS-H report for my “chiller,” which represented
the plant, I found that I was not getting constant EIRs after creating my own curves, etc. It was also not a constant error, getting worse in the cooler months and closer to my expected value in the summer.<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">The fix was to remove any peripherals or vampire loads from the chiller power in the chiller properties dialog. I modeled the plant as a single, air-cooled
chiller, set my calculated EIR, applied the flat curves (as noted by others below), allowed the “Min Ratio” to go down to 0.01, set “Elec to Condenser” to zero (assuming that is already calculated in my overall EIR), and set “Start-up Time” and “Standby Time”
to zero, since in reality the water is available when the building needs it and we’re not firing up a chiller just for me.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Seemed obvious after the fact, but drove me crazy for a little while.<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>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:navy">Thanks,
</span><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:18.0pt;font-family:"Arial","sans-serif";color:navy"> Wesley</span><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:"Century Gothic","sans-serif";color:navy">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><a href="http://www.esdaz.com/"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#76923C;text-decoration:none"><img border="0" width="151" height="151" id="_x0000_i1030" src="cid:image006.jpg@01CE3F5D.EF6A69C0" alt="ESD 25 LOGO BLACK"></span></a><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#76923C"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Century Gothic","sans-serif";color:#76923C">Celebrating 25 Years<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Century Gothic","sans-serif";color:#2C8ECE">Mech</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="http://www.esdaz.com/"><span style="font-family:"Century Gothic","sans-serif";color:#2C8ECE;text-decoration:none">anical
Engineers + Electrical Engineers + Sustainable Design</span></a></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#2C8ECE"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:navy"> </span><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:#404040">Wesley Care, EIT </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#7F7F7F">|</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:navy"> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#404040">Mechanical Project
Engineer</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:navy">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#7F7F7F">|</span><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#76923C">
</span></b><span style="font-size:11.0pt;font-family:Wingdings;color:navy"><a href="mailto:wesley.care@esdaz.com" title="mailto:wesley.care@esdaz.com"><span style="color:#607430;text-decoration:none">*</span><span style="font-family:"Calibri","sans-serif";color:navy;text-decoration:none">
</span></a></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#404040"> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#404040"><a href="mailto:wesley.care@esdaz.com"><span style="color:#404040">wesley.care@esdaz.com</span></a></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#5D7430">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#7F7F7F">|</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#C00000">
</span><span style="font-size:11.0pt;font-family:Wingdings;color:#5D7430">(</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#5D7430">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#404040">480.481.4973</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#76923C">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#7F7F7F">|</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#76923C">
</span><span style="font-size:11.0pt;font-family:"Wingdings 2";color:#607430">6</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#5D7430">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#404040">480.481.4903</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> Nick Caton [mailto:ncaton@smithboucher.com]
<br>
<b>Sent:</b> Monday, April 22, 2013 9:41 AM<br>
<b>To:</b> Joe Huang; Esmireta<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<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>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This is something I haven’t ever fully resolved for myself actually… eQuest contains a set of DOE-2.2 manual volumes, found under the eQuest “Help” menu.
<o:p></o:p></span></p>
<p class="MsoNormal"><img border="0" width="298" height="253" id="Picture_x0020_5" src="cid:image007.png@01CE3F5D.EF6A69C0"><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"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I believe the first 4 volumes are the “core” DOE2.2 volumes, and the other volumes have been appended over time as eQuest/DOE2 have developed in more recent
years. <i><u>I’m not clear on</u></i> whether these in sum are any more or less “complete” than past or present manuals for the underlying DOE2 simulation engine itself. I am pretty sure some parts of this are compiled by & for eQuest specifically (Volume
5: Compliance Analysis in particular jumps to mind).<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">More specifically to Esmireta’s follow up query, you can find the entry I cited on Chiller Energy Consumption, and explore the associated inputs further, in
a few ways:<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">First, navigate to “DOE-2 Help” from the Help context menu.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img border="0" width="431" height="245" id="Picture_x0020_3" src="cid:image008.png@01CE3F5D.EF6A69C0"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">From here, you can navigate to the previously appended chiller energy consumption entry. Here’s a better citation for those who aren’t seeing images in my
emails: Volume 2 > HVAC Components > CHILLER > Chiller Energy Consumption. You can also read up on all the associated BDL inputs by highlighting the branch elements following in the tree view:<o:p></o:p></span></p>
<p class="MsoNormal"><img border="0" width="1002" height="910" id="Picture_x0020_2" src="cid:image009.png@01CE3F5D.EF6A69C0"><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"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Second, while working in eQuest and particularly after the wizards, you can also right-click most input fields to pull up a context-sensitive index of sorts
to lead you to appropriate entries in the DOE2 manuals – this is the primary way I access & navigate the supporting documentation in practice:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img border="0" width="1044" height="569" id="Picture_x0020_4" src="cid:image010.png@01CE3F5D.EF6A69C0"><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">Regards,<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">~Nick<o:p></o:p></span></p>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><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:image011.jpg@01CE3F5D.EF6A69C0" alt="cid:489575314@22072009-0ABB"></span><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Stylus BT","sans-serif";color:#2D4D5E">NICK CATON, P.E.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#CC9900">SENIOR ENGINEER<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#CC9900"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">Smith & Boucher Engineers</span><span style="font-size:7.5pt;color:#CC9900"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">25501 west valley parkway, suite 200<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">olathe, ks 66061<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">direct 913.344.0036<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">fax 913.345.0617<o:p></o:p></span></p>
<p class="MsoNormal"><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="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a> [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Joe Huang<br>
<b>Sent:</b> Monday, April 22, 2013 10:40 AM<br>
<b>To:</b> Esmireta<br>
<b>Cc:</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?<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">I was referring to the DOE-2 Supplement, Version 2.1E, produced by LBNL in 1993 (LBL-34947). I have not looked at the help function of eQUEST, so I can't tell how detailed is it.<br>
<br>
Joe<o:p></o:p></p>
<pre>Joe Huang<o:p></o:p></pre>
<pre>White Box Technologies, Inc.<o:p></o:p></pre>
<pre>346 Rheem Blvd., Suite 108D<o:p></o:p></pre>
<pre>Moraga CA 94556<o:p></o:p></pre>
<pre><a href="mailto:yjhuang@whiteboxtechnologies.com">yjhuang@whiteboxtechnologies.com</a><o:p></o:p></pre>
<pre><a href="http://www.whiteboxtechnologies.com">www.whiteboxtechnologies.com</a><o:p></o:p></pre>
<pre>(o) (925)388-0265<o:p></o:p></pre>
<pre>(c) (510)928-2683<o:p></o:p></pre>
<pre>"building energy simulations at your fingertips"<o:p></o:p></pre>
<p class="MsoNormal"><br>
On 4/21/2013 9:49 PM, Esmireta wrote: <o:p></o:p></p>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Hi Joe,
<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Thanks for your reply!<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Is the DOE-2.2 manual the DOE help in the eQuest?<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Esmi<br>
<br>
<br>
<br>
<br>
<br>
At 2013-04-18 03:17:00,"Joe Huang" <a href="mailto:yjhuang@whiteboxtechnologies.com"><yjhuang@whiteboxtechnologies.com></a> wrote:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Do you not have a copy of a DOE-2.2 or DOE-2.1E manual? That would make it hard to understand how DOE-2 works.<br>
DOE-2 has many performance curves, depending on the type of equipment. The EIR-FT curves are either bi-linear or bi-quadratic functions of the entering wetbulb and outdoor drybulb temperature. The EIR-FPLR curves can be linear, quadratic, or cubic functions
of the Part Load Ratio (PLR). <br>
<br>
By the way,what I said yesterday was in reference to packaged SYSTEMS. If your model contains a PLANT model with a Chiller, then<br>
the keywords for the chiller performance curves change somewhat.<br>
<br>
Joe<o:p></o:p></span></p>
<pre>Joe Huang<o:p></o:p></pre>
<pre>White Box Technologies, Inc.<o:p></o:p></pre>
<pre>346 Rheem Blvd., Suite 108D<o:p></o:p></pre>
<pre>Moraga CA 94556<o:p></o:p></pre>
<pre><a href="mailto:yjhuang@whiteboxtechnologies.com">yjhuang@whiteboxtechnologies.com</a><o:p></o:p></pre>
<pre><a href="http://www.whiteboxtechnologies.com">www.whiteboxtechnologies.com</a><o:p></o:p></pre>
<pre>(o) (925)388-0265<o:p></o:p></pre>
<pre>(c) (510)928-2683<o:p></o:p></pre>
<pre>"building energy simulations at your fingertips"<o:p></o:p></pre>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif""><br>
On 4/16/2013 11:09 PM, Esmireta wrote: <o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Hi Joe,
<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">In the simulation of a district cooling system, the guidance requires a virtual plant with a constant average efficiency.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">In the DOE curves, how can I know the meaning of the equation and the coefficients in it? It seems there is no useful information in the DOE help.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Thanks!<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Esmi<br>
<br>
<br>
<br>
<br>
<br>
At 2013-04-17 10:35:35,"Joe Huang" <a href="mailto:yjhuang@whiteboxtechnologies.com"><yjhuang@whiteboxtechnologies.com></a> wrote:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">DOE-2 modifies the COOL-EIR using several curves COOL-EIR-FT as a function of outdoor conditions and COOL-EIR-FPLR as a function of the Part Load
Ratio. I suppose you could set those to be constant. Another way would be to just take the Cooling Load from the SS-D report and divide that by your constant COP. But my question would be, why do you want to do that ?<br>
<br>
Joe<o:p></o:p></span></p>
<pre>Joe Huang<o:p></o:p></pre>
<pre>White Box Technologies, Inc.<o:p></o:p></pre>
<pre>346 Rheem Blvd., Suite 108D<o:p></o:p></pre>
<pre>Moraga CA 94556<o:p></o:p></pre>
<pre><a href="mailto:yjhuang@whiteboxtechnologies.com">yjhuang@whiteboxtechnologies.com</a><o:p></o:p></pre>
<pre><a href="http://www.whiteboxtechnologies.com">www.whiteboxtechnologies.com</a><o:p></o:p></pre>
<pre>(o) (925)388-0265<o:p></o:p></pre>
<pre>(c) (510)928-2683<o:p></o:p></pre>
<pre>"building energy simulations at your fingertips"<o:p></o:p></pre>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif""><br>
On 4/16/2013 6:55 PM, Esmireta wrote: <o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Dear all,
<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">I wonder how to set the COP of a chiller as constant? after I set the chiller type, the electric input ratio type is determined, which means the self-made constant curve cannot
be input.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Thanks!<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Esmi<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.5pt;font-family:"Arial","sans-serif""><br>
<br>
<o:p></o:p></span></p>
<pre><o:p> </o:p></pre>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>Equest-users mailing list<o:p></o:p></pre>
<pre><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><o:p></o:p></pre>
<pre>To unsubscribe from this mailing list send a blank message to <a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><o:p></o:p></pre>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.5pt;font-family:"Arial","sans-serif""><br>
<br>
<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
<br>
<o:p></o:p></p>
</div>
</body>
</html>