<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=utf-8">
<meta name="Generator" content="Microsoft Word 15 (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:Helvetica;
panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"Franklin Gothic Medium";
panose-1:2 11 6 3 2 1 2 2 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman",serif;}
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;}
span.EmailStyle17
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:#1F497D;}
span.EmailStyle18
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.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 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">Kusum,<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 entry for “Chiller Energy Consumption” in the DOE-2 help files is a good place to start. It explains how hourly chiller energy is determined.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The three curves that determine hourly chiller energy are EIR-FT, EIR-FPLR and CAPACITY-FT. I believe the data in your attachment could help you create a custom
curve for any one of these inputs, given the other two. I would create a custom EIR-FT curve based on the default eQUEST curves for EIR-FPLR and CAPACITY-FT for an air-cooled chiller, but you could create a custom EIR-FPLR curve using default curves for the
other two as well.<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 independent variables (knowns) that you have based on your manufacturer’s data are CHW-T, DBT, (or t1, t2 per the help menu description), Load, rated Capacity
and EIR. (More correctly, you have <i>design capacity</i> at 105F since the eQUEST
<i>rated capacity</i> is based on 95F outdoor drybulb.)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The dependent variables are hourly capacity as a function of temperature Cap<sub>hour</sub>, and PLR which is a function of load and Cap<sub>hour</sub>.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The manufacturer’s data column for “Capacity” is mislabeled. It is actually load, as seen by multiplying the “Percent Loading” column by the design capacity.
Actual chiller capacity should <i>increase</i> slightly with decreasing ambient temperature. So the table doesn’t actually show you the part load ratio PLR, which is the load divided by the hourly capacity.<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">~Bill<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"><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:black">William Bishop, PE, BEMP, BEAP, CEM, LEED AP
</span></b><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:#006600">|</span></b><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:black"> Pathfinder Engineers & Architects LLP<o:p></o:p></span></b></p>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="658" style="width:394.8pt;border-collapse:collapse">
<tbody>
<tr style="height:13.45pt">
<td width="431" style="width:258.45pt;padding:0in 5.4pt 0in 5.4pt;height:13.45pt">
<p class="MsoNormal" style="line-height:105%"><b><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black">Senior Energy Engineer<o:p></o:p></span></b></p>
</td>
<td width="227" rowspan="6" style="width:136.35pt;padding:0in 5.4pt 0in 5.4pt;height:13.45pt">
<p class="MsoNormal" style="line-height:105%"><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black"><img width="70" height="47" id="Picture_x0020_4" src="cid:image002.jpg@01D10A7E.94C599B0">
<img width="57" height="49" id="Picture_x0020_2" src="cid:image004.jpg@01D10A7E.94C599B0"><o:p></o:p></span></p>
</td>
</tr>
<tr style="height:4.55pt">
<td width="431" valign="top" style="width:258.45pt;padding:0in 5.4pt 0in 5.4pt;height:4.55pt">
<p class="MsoNormal" style="line-height:105%"><span style="font-size:5.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
</td>
</tr>
<tr style="height:9.8pt">
<td width="431" nowrap="" valign="bottom" style="width:258.45pt;padding:0in 5.4pt 0in 5.4pt;height:9.8pt">
<p class="MsoNormal" style="line-height:105%"><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#1F497D">134 South Fitzhugh Street</span><span style="font-size:9.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#1F497D">
</span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#1F497D">Rochester, NY 14608<o:p></o:p></span></p>
</td>
</tr>
<tr style="height:12.4pt">
<td width="431" valign="top" style="width:258.45pt;padding:0in 5.4pt 0in 5.4pt;height:12.4pt">
<p class="MsoNormal" style="line-height:105%"><b><i><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#002060">T: (585) 698-1956</span></i></b><b><i><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#002060">
</span></i></b><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#1F497D">F: (585) 325-6005</span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
</td>
</tr>
<tr style="height:9.8pt">
<td width="431" valign="top" style="width:258.45pt;padding:0in 5.4pt 0in 5.4pt;height:9.8pt">
<p class="MsoNormal" style="line-height:105%"><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#1F497D"><a href="mailto:wbishop@pathfinder-ea.com"><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif">bbishop@pathfinder-ea.com</span></a></span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black">
</span><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#1F497D"><a href="http://www.pathfinder-ea.com/"><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif">www.pathfinder-ea.com</span></a><o:p></o:p></span></p>
</td>
</tr>
<tr style="height:24.6pt">
<td width="431" valign="top" style="width:258.45pt;padding:0in 5.4pt 0in 5.4pt;height:24.6pt">
<p class="MsoNormal" style="margin-top:3.0pt;line-height:105%"><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#1F497D"><img border="0" width="42" height="40" id="Picture_x0020_5" src="cid:image006.png@01D10A7E.94C599B0" alt="http://png-5.findicons.com/files/icons/977/rrze/720/globe.png"></span><span style="font-size:7.5pt;line-height:105%;font-family:"Calibri",sans-serif;color:#00B0F0">Carbon
Fee and Dividend - simple, effective, and market-based.</span><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
</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 #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>John Aulbach<br>
<b>Sent:</b> Monday, October 19, 2015 12:26 PM<br>
<b>To:</b> Kusum Sekhalia <skusum3@gmail.com>; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Air-cooled Chiller EIRFPLR curve in eQUEST<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-family:"Verdana",sans-serif;color:black">Hi Kusem:<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
</div>
<div id="yui_3_16_0_1_1445271547965_4542">
<p class="MsoNormal" style="background:white"><span style="font-family:"Verdana",sans-serif;color:black">I don't have too much time, but if you are holding a 44 DegF CHW temp and varying the outdoor temp (essentially your condenser), aren't you simply changing
the capacity of the chiller based on outdoor temp. I believe you need to leaving the outdoor temp at a fixed temp, then apply your part load and the equivalent kW. <o:p></o:p></span></p>
</div>
<div id="yui_3_16_0_1_1445271547965_4542">
<p class="MsoNormal" style="background:white"><span style="font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
</div>
<div id="yui_3_16_0_1_1445271547965_4542">
<p class="MsoNormal" style="background:white"><span style="font-family:"Verdana",sans-serif;color:black">eQuest will vary the chiller peak based on outdoor loadwith onwe of the other chiller curves (guys, help me).<o:p></o:p></span></p>
</div>
<div id="yui_3_16_0_1_1445271547965_4542">
<p class="MsoNormal" style="background:white"><span style="font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
</div>
<div id="yui_3_16_0_1_1445271547965_4542">
<p class="MsoNormal" style="background:white"><span style="font-family:"Verdana",sans-serif;color:black">John Aulbach<o:p></o:p></span></p>
</div>
<p class="MsoNormal" style="background:white"><span style="font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
</div>
<div>
<div>
<div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">On Monday, October 19, 2015 9:05 AM, Kusum Sekhalia <<a href="mailto:skusum3@gmail.com">skusum3@gmail.com</a>> wrote:</span><span style="font-family:"Helvetica",sans-serif;color:black"><o:p></o:p></span></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Helvetica",sans-serif;color:black"><o:p> </o:p></span></p>
<div>
<div id="yiv1233392623">
<div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Hi all,<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">I am trying to create an air-cooled chiller EIRFPLR curve but am getting errors. I am not able to figure out what am I doing wrong? I have attached the
part load data from the manufacturer. Can someone help me or provide me some information which shows step by step on how to create the curve. I am using the Design guidelines HVAC simulation pdf to create the curve but not successful so far. Please help.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Thank you in advance.
<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Kusum Shekhlia<o:p></o:p></span></p>
</div>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Helvetica",sans-serif;color:black"><br>
_______________________________________________<br>
Equest-users mailing list<br>
<a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><br>
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><br>
<br>
<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>