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<span style="color: black;"><span style="color: black; line-height:
115%; font-family: "Calibri","sans-serif";
font-size: 11pt;" lang="EN">Zhuo Li,<br>
Without seeing your project files, it is not possible to
determine the cause of the unrealistically high temperatures. I
would recommend that you send your project files to your
distributor's technical support hotline for assistance. <br>
<br>
The warnings that you are receiving may well be related to the
high temperatures. Performance maps in TRNSYS usually contain
data for a range of inlet conditions. For example the samp_c.dat
file contains performance data for chillers whose return chilled
water temperatures are between 4.4C and 10C. If the water
returning to the chiller is above 10C then the performance data
returned from the map may not be valid. If the problem happens
only a few times during the simulation then it can usually be
ignored. If the situation arises often then either the system
configuration or the data file need to be changed so that valid
performance data is returned.<br>
<br>
kind regards,<br>
David<br>
<br>
</span></span><br>
<div class="moz-cite-prefix">On 09/14/2015 01:00, Zhuo Li wrote:<br>
</div>
<blockquote
cite="mid:CY1PR0701MB20091CF201BD7F2C0E7B0BE5DB5D0@CY1PR0701MB2009.namprd07.prod.outlook.com"
type="cite">
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<p><span style="color: black;">Dear Trnsys users,</span></p>
<p><span style="color: black;"></span> </p>
<p><span style="color: black;">I am using type 56 to model an
air conditioning system for a three-story building.
</span><span style="color: black;" lang="EN">In my program,
each floor has an air handling unit and the external air
relative humidity ratio</span><span style="color: black;">,</span><span
style="color: black;" lang="EN"> mass flow rate, and
temperature are obtained as ventilation inputs to building
model from Type 607</span><span style="color: black;">,
which is connected to cooling coils (type 508).<span>
</span>The temperatures of thermal zones of 1st floor are
within acceptable range, whereas temperatures of thermal
zones of 2nd and 3rd floor are going infinitely high. How
can I solve this problem?</span></p>
<p><span style="color: black;"></span> </p>
<span style="color: black;">
<p><span style="color: black;">In addition, I encountered
problems with chiller and ducts.
</span><span style="color: black;" lang="EN">The warning
messages are written below:</span></p>
<p class="MsoNormal" style="background: white; margin: 0in 0in
0pt; line-height: normal;">
<span style="color: black;" lang="EN"></span> </p>
<p class="MsoNormal" style="background: white; margin: 0in 0in
0pt; line-height: normal;">
<span style="color: black;">1) The file\Trnsys 17\Tess
Models\SampleCatalogData\AirCooledChiller\Samp_C.dat was
called with a first independent variable value below the
range supplied in the data file. Data is interpolated
within the data file range but is not extrapolated beyond<span>
</span>the range. Performance of the equipment modeled by
this unit may be incorrect.</span></p>
<p class="MsoNormal" style="background: white; margin: 0in 0in
0pt; line-height: normal;">
<span style="color: black;" lang="EN">2) The referenced
UNIT\ (Type 607)\ has called the PSYCHROMETRICS routine
with a humidity ratio above the saturation humidity ratio
for the given dry bulb temperature. The air was assumed
saturated at the given dry bulb temperature and the
humidity ratio set for this condition.</span><span
style="color: black;"></span></p>
<p class="MsoNormal" style="background: white; margin: 0in 0in
10pt; line-height: normal;">
<span style="color: black;">For the chiller, parameter of
rated capacity was changed and other parameters remained
as default values.</span></p>
<p class="MsoNormal" style="background: white; margin: 0in 0in
10pt; line-height: normal;">
<span style="color: black;"></span><span style="color:
black;" lang="EN">Thanks in advance for your help.</span></p>
<p class="MsoNormal" style="background: white; margin: 0in 0in
10pt; line-height: normal;">
<span style="color: black;" lang="EN">B</span><span
style="color: black;" lang="EN">est regards,</span><span
style="color: black; font-size: 14pt;"></span></p>
<p><span style="color: black; line-height: 115%; font-family:
"Calibri","sans-serif"; font-size:
11pt;" lang="EN">Zhuo Li</span></p>
</span>
<p><span style="color: black;"></span> </p>
</div>
<br>
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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>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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