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<p>Toni,</p>
<p> Type83 will compute the derivative of an input that you give it.
Send your storage temperature to Type83 and watch the derivative;
if it gets too small then you can increase the compressor speed.
There is also a PID controller (Type23) whose gain constants you
can tune to get your compressor to respond to the changing tank
temperature.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 11/29/2022 08:55, Toni Calabrese via
TRNSYS-users wrote:<br>
</div>
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<p class="MsoNormal"><span style="font-size:10.0pt" lang="EN-US">Dear
Trnsys users,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt" lang="EN-US">within
a project we need to control the compressor speed of a heat
pump for the heating of a thermal storage. The basic idea
would be to adapt the compressor speed (from 0 to 100%)
based on a gradient temperature (Tt2 – Tt1) in the storage.
If the temperature of the storage is increasing too slowly,
compressor speed needs to be increased and if the
temperature is increasing too fast, compressor speed needs
to be decreased. Which is the easiest way to implement this
in Trnsys? Which Types could we use?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt" lang="EN-US">Thanks
a lot and have a nice evening<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt" lang="EN-US"><o:p> </o:p></span></p>
<div class="MsoNormal" style="text-align:center" align="center"><span
style="font-size:10.0pt;color:#1F497D;mso-fareast-language:DE-CH">
<hr width="100%" size="2" align="center">
</span></div>
<p class="MsoNormal" style="margin-top:4.0pt"><b><span
style="font-size:10.0pt;color:#1F497D;mso-fareast-language:DE-CH">Toni
Calabrese</span></b><span
style="font-size:10.0pt;color:#1F497D;mso-fareast-language:DE-CH">,
MSc.</span><span
style="font-size:10.0pt;color:#1F497D;mso-fareast-language:DE-CH"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:#1F497D;mso-fareast-language:DE-CH">Wissenschaftlicher
Projektleiter<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:#1F497D;mso-fareast-language:DE-CH"><a
href="mailto:toni.calabrese@spf.ch" moz-do-not-send="true"><span
style="color:#0065A3">toni.calabrese@spf.ch</span></a> |</span><span
style="font-size:10.0pt;color:#8C195F;mso-fareast-language:DE-CH">
</span><span
style="font-size:10.0pt;color:#1F497D;mso-fareast-language:DE-CH"><a
href="mailto:toni.calabrese@ost.ch" moz-do-not-send="true"><span
style="color:#0065A3">toni.calabrese@ost.ch</span></a></span><span
style="font-size:10.0pt;color:#8C195F;mso-fareast-language:DE-CH"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Calibri",sans-serif;color:#8C195F;mso-fareast-language:DE-CH"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:#1F497D;mso-fareast-language:DE-CH">T
+41 58 257 4827<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:#1F497D;mso-fareast-language:DE-CH"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:#002060;mso-fareast-language:DE-CH">SPF
Institut für Solartechnik<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:#002060;mso-fareast-language:DE-CH">OST
– Ostschweizer Fachhochschule<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:#002060;mso-fareast-language:DE-CH">Oberseestr.
10 | CH-8640 Rapperswil | Switzerland |
</span><span style="color:red;mso-fareast-language:DE-CH"><a
href="http://www.spf.ch/" moz-do-not-send="true"><span
style="font-size:10.0pt;color:red;text-decoration:none">www.spf.ch</span></a></span><span
style="font-size:10.0pt;color:#002060;mso-fareast-language:DE-CH"> |
</span><span style="color:red;mso-fareast-language:DE-CH"><a
href="http://www.ost.ch/" moz-do-not-send="true"><span
style="font-size:10.0pt;color:red;text-decoration:none">www.ost.ch</span></a></span><span
style="mso-fareast-language:DE-CH"><o:p></o:p></span></p>
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</span></div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<br>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy System Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
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