<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"Arial Unicode MS";
panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
{font-family:"\@Arial Unicode MS";
panose-1:2 11 6 4 2 2 2 2 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
span.E-MailFormatvorlage17
{mso-style-type:personal-compose;
font-family:Arial;
color:windowtext;}
p.Default, li.Default, div.Default
{margin:0cm;
margin-bottom:.0001pt;
text-autospace:none;
font-size:12.0pt;
font-family:Arial;
color:black;}
@page Section1
{size:595.3pt 841.9pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=DE link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hello everyone,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=2 color=black face=Arial><span lang=EN-GB
style='font-size:10.0pt'>I want to create an external file for type 53. According
to the manual I have to calculate “</span></font><font size=1><span
lang=EN-GB style='font-size:9.0pt'>the ratio of the temperature difference
between the condenser water outlet and the evaporator water outlet relative to
a specified design temperature difference”. I calculated these ratios
based on manufacturers data at the following chiller conditions:<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>- decreasing chilled water mass flow rate (representing
part load)<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>- constant cooling water inlet temperature and therefore
decreasing outlet temperature<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>- constant chilled water outlet temperature<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'><o:p> </o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>My file then looks like this:<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'><o:p> </o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>0.00 0.78 0<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>0.05 0.79 0.08<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>0.10 0.81 0.17<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>0.15 0.82 0.25<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>0.25 0.84 0.42<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>0.30 0.85 0.46<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>0.40 0.87 0.49<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>0.50 0.89 0.55<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>0.60 0.91 0.60<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>0.70 0.93 0.66<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>0.80 0.95 0.74<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>0.90 0.98 0.85<o:p></o:p></span></font></p>
<p class=Default style='mso-margin-top-alt:5.0pt;margin-right:0cm;margin-bottom:
5.0pt;margin-left:0cm'><font size=1 color=black face=Arial><span lang=EN-GB
style='font-size:9.0pt'>1.00 1.00 1<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>When I run the simulation I get an error at the time
step the chiller is supposed to turn on:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>“The chiller is operating outside of the range
defined by the performance curve fit.”<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>The question is now: Is the form of the file
incorrect? (which I don’t think) Or did I calculate the ratios wrongly?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Thank you in advance<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Martin<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Bei Fragen bitten wir um Ihren Rückruf.<br>
<br>
<br>
Mit freundlichen Grüßen<br>
<br>
BLS Energieplan GmbH<br>
i. A. Martin Thur<br>
</span></font><font size=1 color=gray face=Arial><span style='font-size:7.5pt;
font-family:Arial;color:gray'><br>
Elsenstraße 106<br>
D-12435 Berlin<br>
Tel.: +49 30 53 32 81-0<br>
Fax: +49 30 53 32 81-40<br>
____________________________________________________<br>
BLS Energieplan GmbH<br>
Sitz der Gesellschaft: Berlin<br>
Geschäftsführer: Christoph Lange, Wolfgang Sturm<br>
Registergericht: Amtsgericht Berlin-Charlottenburg, HRB-Nr. 32021 </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
</body>
</html>