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<p>There are a number of components available as add-ons to TRNSYS.
<br>
</p>
<p>Type204 is a freely available model provided as-is and without
any technical support in the TRNLib archive
(<a class="moz-txt-link-freetext" href="http://sel.me.wisc.edu/trnsys/trnlib/library16.htm#thermalstorage">http://sel.me.wisc.edu/trnsys/trnlib/library16.htm#thermalstorage</a>)</p>
<p>Type1270 is a commercially available PCM model from TESS that
assumes the PCM is sandwiched as a layer in a room's wall
constructions.
(<a class="moz-txt-link-freetext" href="http://trnsys.com/tess-libraries/individual-components.php">http://trnsys.com/tess-libraries/individual-components.php</a>)</p>
<p>Type399 is a commercially available PCM model from Transsolar
(<a class="moz-txt-link-freetext" href="http://trnsys.de/docs/komponenten/komponenten_ts_en.htm">http://trnsys.de/docs/komponenten/komponenten_ts_en.htm</a>)</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 05/04/2017 09:05, via TRNSYS-users
wrote:<br>
</div>
<blockquote
cite="mid:1523103047.3874771.1493906747466.JavaMail.zimbra@laposte.net"
type="cite">
<div style="font-family: times new roman, new york, times, serif;
font-size: 14pt; color: #000000">
<div>Dear Jeff Thornton</div>
<div>I would like to ask you if there is a type in TRNSYS wich
simulate an MCP (material phase change) model</div>
<div>thank you</div>
<div><br>
</div>
<div><span name="x"></span>Kaouther Ben Nasr<br>
Docteur Ingénieur\\Génie Énergétique<br>
Maître assistant à l'ENAU <br>
Chercheur au CRTEn\\Technopôle Borj Cédria<br>
mobile: +216 53 48 44 38<span name="x"></span><br>
</div>
<div><br>
</div>
<hr id="zwchr">
<div
style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"
data-mce-style="color: #000; font-weight: normal; font-style:
normal; text-decoration: none; font-family:
Helvetica,Arial,sans-serif; font-size: 12pt;"><b>De: </b>"Jeff
Thornton via TRNSYS-users"
<a class="moz-txt-link-rfc2396E" href="mailto:trnsys-users@lists.onebuilding.org"><trnsys-users@lists.onebuilding.org></a><br>
<b>À: </b>"Amirreza Heidary"
<a class="moz-txt-link-rfc2396E" href="mailto:amirrezaheidarysbu@gmail.com"><amirrezaheidarysbu@gmail.com></a>, "TRNSYS users mailing
list at OneBuilding.org"
<a class="moz-txt-link-rfc2396E" href="mailto:trnsys-users@lists.onebuilding.org"><trnsys-users@lists.onebuilding.org></a><br>
<b>Envoyé: </b>Samedi 29 Avril 2017 16:52:42<br>
<b>Objet: </b>Re: [TRNSYS-users] problem with differential
controller<br>
<div><br>
</div>
<div>Amirreza,</div>
<div id="AppleMailSignature"><br>
</div>
<div id="AppleMailSignature">Real solar collectors do the same
thing under certain circumstances. From a first glance I
would say your dead bands are too tight - typically we see
10/2 not 5/2. It's also possible that your collector pump
flow rate is too high. With collectors connected in series
you typically have a pump flow rate the same as if you had
only one collector. Collectors are designed for a given
maximum flow rate for pressure drop reasons. For example,
assume we had a collector that wanted 450 kg/h of flow and
we had 6 in series. We would run the pump at 450 (each
collector gets the 450 that way). You wouldn't run your
pump at 2700 (450 x 6) or the pressure drop would be
ridiculously high. If you have that high of a flow rate
you'll get exactly what you are seeing in your project.
With no flow the collector temperature is above the
deadband but when the pump turns on the high flow rate
causes the outlet temperature to drop below the lower
deadband. The controller can't find a solution since both
are correct and will oscillate between on and off.</div>
<div id="AppleMailSignature"><br>
</div>
<div id="AppleMailSignature">Jeff</div>
<div id="AppleMailSignature">TESS Inc<br>
<div><br>
</div>
Sent from my iPhone</div>
<div><br>
On Apr 29, 2017, at 2:36 AM, Amirreza Heidary via
TRNSYS-users <<a moz-do-not-send="true"
href="mailto:trnsys-users@lists.onebuilding.org"
target="_blank"
data-mce-href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a>>
wrote:<br>
<div><br>
</div>
</div>
<blockquote>
<div>
<div dir="ltr"><img moz-do-not-send="true"
class="mailtrack-img" style="float:right;" alt=""
src="https://mailtrack.io/trace/mail/0a28719c14bd30ad7c353f53cc4b911f030d1d23.png?u=1249159"
data-mce-style="float: right;" height="0" width="0">Dear
All
<div>I'm using a 5 collectors in series with a
differential controller to turn on the pump when the
difference of collector outlet and inlet temperatures
is more than 5 and turn it off when it is less than
2.But the signal and collector output temperatures are
fluctuating too much, also the signal is not
compatible with temperature <a moz-do-not-send="true"
href="http://variations.as" target="_blank"
data-mce-href="http://variations.as">variations.as</a>
you can see in the following diagram, the signal is 1
when the outlet temperature is at maximum ! </div>
<div>(red line is collector outlet temperature and
orange line is the controller signal)</div>
<div><img src="cid:part4.8D19BC63.C085ACF2@tess-inc.com"
alt="Inline image 1"
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<div><span>_______________________________________________</span><br>
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<pre wrap="">_______________________________________________
TRNSYS-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:TRNSYS-users@lists.onebuilding.org">TRNSYS-users@lists.onebuilding.org</a>
<a class="moz-txt-link-freetext" href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a>
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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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