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<p>Andrea,</p>
<p> The Type534 documentation goes into some detail about the energy
balance that the tank performs. It can be found in:</p>
<p><br>
</p>
<p>..\TrnsysXX\Tess
Models\Documentation\11-StorageTankLibraryMathematicalReference.pdf</p>
<p><br>
</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 01/22/2019 06:44, Andrea Diaz
Guasgua via TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:fc875926cd4f4b5cb76fcd302155a60d@student.tudelft.nl">
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dir="ltr">
<p>Dear group,</p>
<p><br>
</p>
<p>I am trying to understand the energy balance from the
following scheme. A boiler(Type 751) sends its temperature and
flow to port 1 of a storage tank (Type 534 with two nodes and
ports). I left port 2 disconnected with its temperature set to
a constant value equal to the boiler's output temperature and
flow equal to zero. </p>
<p><br>
</p>
<p>From my understanding I am injecting energy from the boiler
into the tank only. So I computed the tank stored energy as
Store_Energy_Tank = Volume_Tank*SpecificHeatCapacity*density,
and then integrated over 1 hour period so I can get the rate.
I thought this calculation should be approximately to the
output from the tank called "Tank Energy Storage Rate
[KJ/hr]", but apparently is not. Also, I checked some examples
from TRNSYS library and this value is negative. </p>
<p><br>
</p>
<p>My questions are how can I compute the stored energy in a
tank and what do the signs means?</p>
<p><br>
</p>
<p>I would appreciate your help,</p>
<p><br>
</p>
<p>Regards,</p>
<p>Andrea </p>
</div>
<br>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
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>
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