<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:x="urn:schemas-microsoft-com:office:excel" 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 15 (filtered medium)">
<style><!--
/* Font Definitions */
@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;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-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;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
p.Normal, li.Normal, div.Normal
{mso-style-name:"\[Normal\]";
margin:0in;
margin-bottom:.0001pt;
text-autospace:none;
font-size:12.0pt;
font-family:"Arial",sans-serif;}
span.EmailStyle19
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;
font-family:"Calibri",sans-serif;}
@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">When a curve output exceeds the limits (min/max output, OUTPUT-MIN and OUTPUT-MAX keywords), eQUEST throws a CAUTION message in the SIM file, something like this:<o:p></o:p></p>
<p class="Normal"><span style="font-size:8.0pt;font-family:"Courier New"">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="Normal"><span style="font-size:8.0pt;font-family:"Courier New""> In curve: Variable Speed Drive FPLR the dependent value<o:p></o:p></span></p>
<p class="Normal"><span style="font-size:8.0pt;font-family:"Courier New""> is exceeding the limits.<o:p></o:p></span></p>
<p class="Normal"><span style="font-size:8.0pt;font-family:"Courier New""> Value/Min/Max/First time: 1.004 0.100 1.000 7/21/ 8<o:p></o:p></span></p>
<p class="Normal"><span style="font-size:8.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="Normal"><span style="font-size:8.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal">I’m curious, what happens when the input type for a performance curve is “Raw Data Points” and during the course of the simulation one of the independent variables is outside the range of the raw data points? For example, here’s a curve
from the library (BDLLIB.DAT) that’s defined via data points:<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">$LIBRARY-ENTRY SmFricW3VSD-EIR-fPLR&dT CURVE-FIT Sml Fric 3App -044d2 35<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">$ 70/140 ton, 3F approach evap & cond; R134a extended 460V 10F superheat -044d2 36<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">$ EIR = 0.182, 0.64 kW/ton, COP 5.5 -044d2 37<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> TYPE = BI-QUADRATIC-RATIO&DT INPUT-TYPE = DATA -044d2 38<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> IN-RATIO = ( 1.00, 0.75, 0.50, 0.25, $ PLR -044d2 39<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> 1.00, 0.75, 0.50, 0.25, -044d2 40<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> 1.00, 0.75, 0.50, 0.25, -044d2 41<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> 1.00, 0.75, 0.50, 0.28 ) -044d2 42<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> IN-DT = ( 41.0, 41.0, 41.0, 41.0, $ ECT-CHW DT -044d2 43<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> 31.0, 31.0, 31.0, 31.0, -044d2 44<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> 26.0, 26.0, 26.0, 26.0, -044d2 45<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> 46.0, 46.0, 46.0, 46.0 ) -044d2 46<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> OUTPUT = ( 1.00, 0.70, 0.46, 0.27, $ EIR ratio -044d2 47<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> 1.00, 0.66, 0.39, 0.22, -044d2 48<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> 1.00, 0.65, 0.38, 0.19, -044d2 49<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> 1.00, 0.72, 0.50, 0.32 ) .. -044d2 50<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In the data points, the minimum PLR boundary for the curve is 0.25 – what happens if during the simulation the PLR is 0.20? Does eQUEST use the curve output regardless (and is a CAUTION generated), or is the output at the minimum independent
variable used?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#005E68">Phil Jordan</span></b><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>