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Erwan,<br>
Type655 does consider the effect of ambient temperature; it is one
of the two variables in the performance data file (the other
variable is the desired chilled water outlet temperature). What you
might be seeing, however, is that the routine that reads the
performance data is able to interpolate performance within the range
of data given but it cannot extrapolate beyond the range. If the
highest ambient temperature in the data file is 30C and all of the
ambient temperatures during the simulation are above 30C then you
will always get the capacity and COP that correspond to to the
performance at 30C. <br>
<br>
If that does not correct the problem, please send me the *.tpf
file and the chiller data files that you are using and I will see if
I can determine the cause of the problem.<br>
Kind regards,<br>
David<br>
<br>
<br>
On 8/24/2011 06:45, LIBIOT, Erwan wrote:
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<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);" lang="EN-US">Dears all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);" lang="EN-US">I'm using the type 655 "chilled
water flow rate" from TESS library. First, I noticed an
inversion between CAPACITY ratio and COP ratio in the
external file (containing the chiller performance data). <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);" lang="EN-US">Secondly, here my problem; this type
do not consider the ambient temperature in the chiller
capacity and COP calculations. In fact, this model always
choose CAP and COP ratio values corresponding to the highest
ambient temperature for a chilled water temperature. So,
have you got an idea about how can I figure out this issue?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">Thanks you<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><br>
Erwan Libiot<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<div style="border-right: medium none; border-width: 1pt medium
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<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family: "Tahoma","sans-serif";">De :</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";"> Matt Duffy
[<a class="moz-txt-link-freetext" href="mailto:duffy@tess-inc.com">mailto:duffy@tess-inc.com</a>] <br>
<b>Envoyé :</b> mardi 2 août 2011 14:49<br>
<b>À :</b> luis Carlos vela garcia;
<a class="moz-txt-link-abbreviated" href="mailto:trnsys-users@cae.wisc.edu">trnsys-users@cae.wisc.edu</a><br>
<b>Objet :</b> Re: [TRNSYS-users] problem type 655
(chilled water flow rate)<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom: 12pt;">Dear Luis
Carlos Vela,<br>
<br>
That is fixed for TESS Libraries version 17.01 (you may see
the version of the TESS Libraries that you have by viewing the
names of their external DLL's in the ".\UserLib\ReleaseDLLs"
directory or by looking at the 'Readme.html' file in the
".\Tess Models" directory). Thus, please make sure that you
are using that version.<br>
<br>
Best regards,<br>
<br>
Matt Duffy<br>
<br>
<o:p></o:p></p>
<div>
<p class="MsoNormal" style="margin-bottom: 12pt;"><strong>-----
Original Message -----</strong><br>
<strong>From:</strong> "luis Carlos vela garcia"
<a class="moz-txt-link-rfc2396E" href="mailto:lcarlosvg@hotmail.es"><lcarlosvg@hotmail.es></a> <br>
<strong>Sent:</strong> Fri, July 29, 2011 16:24<br>
<strong>Subject:</strong> [TRNSYS-users] problem type 655
(chilled water flow rate)<o:p></o:p></p>
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<p class="MsoNormal"><br>
<span class="ecxhps"><span lang="EN">good
day.</span></span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span class="ecxhps"><span
lang="EN">My name is Luis Carlos Vela
colmbiano am a college student and
Francisco José de Caldas District, has
the license lacual TRNSYS V17. I am
currently developing my graduation
project and I have questions,</span></span><span
lang="EN"><br>
<span class="ecxhps"> </span><br>
<span class="ecxhps"> </span><br>
<span class="ecxhps"> </span><br>
<span class="ecxhps"> TranSys attached
image</span></span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span class="ecxhps"><span
lang="EN">when I choose the type chiller
655 and I will enter the input data see
the following problem.</span></span><span
lang="EN"><br>
<span class="ecxhps">Water chiller units
are degrees Celsius flexible rate, so my
question is what units should I enter in
this box as Celsius tablets are not
units! of flow.</span></span><o:p></o:p></p>
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<pre>_______________________________________________<o:p></o:p></pre>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
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