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Amani,<br>
It should be possible to use the PID controller to obtain the
outlet temperature that you want but without having your project, it
isn't possible to know what is incorrect. This is the kind of
question you should address to your distributor.<br>
<br>
As a side note, if you have access to the TESS HVAC library, there
are a number of heat exchanger models in that library that are set
up to allow control based on outlet temperature of either the hot or
the cold side.<br>
Kind regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 6/28/2013 04:41, Amani ZRIBA wrote:<br>
</div>
<blockquote cite="mid:DUB113-W75026B361B05FC9F89CF79F3760@phx.gbl"
type="cite">
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<div dir="ltr"><font style="background-color: rgb(255, 255, 255);"
size="4" face="Times New Roman">Dear TRNSYS users, </font>
<div><font style="background-color: rgb(255, 255, 255);"
size="4" face="Times New Roman"><br>
</font>
<div><font style="background-color: rgb(255, 255, 255);"
size="4" face="Times New Roman">In my model ( a solar wood
dryer) , i have a diverter connected to a heat exchanger
water/air.</font></div>
<div><font style="background-color: rgb(255, 255, 255);"
size="4" face="Times New Roman"><br>
</font>
<div><font style="background-color: rgb(255, 255, 255);"
size="4" face="Times New Roman">I want to control the
flowrate at outlet 1 of the diverter to maintain the
heat exchanger cold-side temperature at a desired value.
I tried with the PID controller but the problem lies in
the components connections.</font></div>
</div>
<div><font style="background-color: rgb(255, 255, 255);"
size="4" face="Times New Roman"><br>
</font></div>
<div>
<p class="ecxMsoNormal" style="line-height: 22px;
margin-bottom: 1.35em;"><span style="line-height: 21px;
background-color: rgb(255, 255, 255);"><font size="4"
face="Times New Roman">Please help me through this
problem.</font></span></p>
<p class="ecxMsoNormal" style="margin-bottom: 1.35em;"><font
size="4" face="Times New Roman"><span
style="line-height: 21px; background-color: rgb(255,
255, 255);"> </span></font></p>
<p class="ecxMsoNormal" style="margin-bottom: 1.35em;"><font
size="4" face="Times New Roman"><span
style="line-height: 21px; background-color: rgb(255,
255, 255);">Best regards.</span></font></p>
</div>
</div>
</div>
<br>
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</blockquote>
<br>
<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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