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Marcus,<br>
:-) I put your subtle hint into our request for enhancements...
thanks. Part of the problem is that there isn't much standardization of
data formats for absorption chillers like there is for heat pumps and
"regular" chillers. So what manufacturers present can vary a lot from
one to the next. Also, a lot of the manufacturers now seem to be
tending towards having in-house software tools that can generate a few
performance points but it is hard to convince the manufacturer's
representatives to either let anyone else use those tools or to
generate the number of points needed to make a map. In anycase, thanks
for the suggestion.<br>
david<br>
<br>
Jones Marcus 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">Nicolàs, from personal experience and the number of
related
posts to this list, I think anyone who uses this type encounters the
same
difficulty and confusion! Personally, under time pressure, I used two
approaches.
The first is to create a very poor approximation by simply using the
data file
provided or creating a simpler data file with constant performance over
a wide
range of data. The data file format itself isn’t that complicated (two
four-variable
functions). The second approach that I am currently trying is to model
the generator,
absorber, and cond/evap coils with the auxiliary heater/cooler types
(Type 92, 6).
It would be extremely useful to have an a wider range of data files, a
simpler
chiller model, or at least a walkthrough of creating a data file, at
least to
get something in the right order of magnitude as a first approximation
. Hint
hint @ developers! <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">Sorry I can’t help more, <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">Marcus<o:p></o:p></span></p>
<p class="MsoNormal"><span
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lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: navy;"
lang="EN-GB">MARCUS JONES, MSc</span></b><span
style="color: rgb(31, 73, 125);" lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial","sans-serif"; color: rgb(120, 131, 134);"
lang="EN-GB">Energy Department</span><span
style="color: rgb(31, 73, 125);" lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial","sans-serif"; color: rgb(120, 131, 134);"
lang="EN-GB">Sustainable Building Technologies </span><span
style="color: rgb(31, 73, 125);" lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 9pt; font-family: "Arial","sans-serif"; color: navy;"
lang="EN-GB"> </span><span style="color: rgb(31, 73, 125);"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span
style="font-family: "Arial","sans-serif"; color: rgb(120, 131, 134);"
lang="EN-US">AIT Austrian Institute of Technology </span></b><span
style="color: rgb(31, 73, 125);" lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial","sans-serif"; color: rgb(120, 131, 134);">Österreichisches
Forschungs- und Prüfzentrum Arsenal Ges.m.b.H. </span><span
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<p class="MsoNormal"><span
style="font-family: "Arial","sans-serif"; color: rgb(120, 131, 134);"
lang="IT">Giefinggasse 2 | 1210 Vienna | Austria </span><span
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<p class="MsoNormal"><span
style="font-family: "Arial","sans-serif"; color: rgb(120, 131, 134);"
lang="IT">T +43(0) 50 550-6387 | M +43(0) 664 210 24 15 | F +43(0)
50550-6598</span><span style="color: rgb(31, 73, 125);" lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif";"
lang="EN-US">From:</span></b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif";"
lang="EN-US"> Nicolàs Rey [<a class="moz-txt-link-freetext" href="mailto:reynicolas84@gmail.com">mailto:reynicolas84@gmail.com</a>]
<br>
<b>Sent:</b> March 4, 2010 7:36 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:trnsys-users@cae.wisc.edu">trnsys-users@cae.wisc.edu</a><br>
<b>Subject:</b> [TRNSYS-users] Type 107 - Data File problem<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">Dear TRNsys users, </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">I have a problem
with type 107, the absorption chiller. In the Data
file folder of TRNsys installation there is only one data file which
can be
used with this type. The problem is that I need to utilize the hot
water with a
temperature in a different range, and not only between 108.89 and
116.11 °C ,
the range of the data available. </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">Should I use data
available on the internet? And if so, What’s
the procedure to use them? I checked in the Mathematical reference but
it is
not so clear. </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">If someone of you
could give me some help, I would be really
grateful , because I need to use this file for my master thesis ( upon
solar
cooling) and I don’t have so much time!</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">Best regards,</span><o:p></o:p></p>
<p class="MsoNormal" style=""><o:p> </o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">Nicolàs Rey</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">Student in
Mechanical Engineering,</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">Cagliari, 09125 Italy</span><o:p></o:p></p>
</div>
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