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<p>Vitor,</p>
<p> Everything that the heat pump model needs is input either in
an external data file or as a parameter to the model. The
example/default data file is from an actual heat pump so the very
simplest thing to do is to change the capacity and power
consumption parameters in the Type927 proforma and leave the
default data file alone. If you have a specific heat pump
(manufacturer, model#, etc.) that you want to use then you'll need
to go to the manufacturer's website and get the heat pump's
performance data. These will be tables that give the heat pump's
capacity and COP as a function of entering water temperature, air
flow rate, etc. You will need to take the manufacturer's data
tables and put them into the format that Type927 requires. You
will also need to "normalize" the data. That means that once you
put it in the Type927 format you will divide each capacity value
by the heat pump capacity at rated inlet conditions and each power
consumption value by the power consumption at the rated inlet
conditions. Essentially the Type927 data file contains a set of
multipliers on the rated capacity and power consumption (which are
taken as parameters in the Type927 proforma) and which allow the
model to account for how the heat pump performs when the inlet
conditions are not at the rated condition.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<p> <br>
</p>
<div class="moz-cite-prefix">On 07/07/2019 10:28, Vitor Leite via
TRNSYS-users wrote:<br>
</div>
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Hello everyone, </div>
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<br>
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<div style="font-family: Calibri, Helvetica, sans-serif;
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I have TRNSYS18 and as I am getting closer to complete my first
model utilizing the program, I have a few questions that could
not be answered utilizing search engines on the internet.</div>
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<br>
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The model is basically a GSHP utilizing type 927 (water-water
HP), type 534-NoHX (storage tank) and type 557a (GHEX) + pumps,
etc ,etc... </div>
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<br>
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My questions are:</div>
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<br>
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1- How can I create the Heat Pump performance data? I already
read both Tess and TRNSYS documentation files but they do not
explain properly what are the steps necessary to create the
performance data file. If what I understand is correct, I just
need to change the source and load entering temperatures at the
file and the maximum rated capacity and power INSIDE trnsys? or
all those must be changed within the data file? I can't find the
rated capacity and power inside the data file.</div>
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<br>
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<div style="font-family: Calibri, Helvetica, sans-serif;
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2- I received the file for DHW demand in kWh. What is the best
way to evaluate my system and match its size accordingly?</div>
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</div>
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<br>
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Thank you everyone,</div>
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<br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif;
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Vitor</div>
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<br>
</div>
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<br>
</div>
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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 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>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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