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<p>Luís,</p>
<p> I would definitely suggest putting in a storage tank. One thing
you can do is to have the heat pumps feed hot water to the storage
tank and have the radiant floor and radiators draw as needed from
the storage tank. In the real world (not just in the simulation)
the heat pumps will struggle during times when there is little
need for heat because their capacity is fairly fixed (assuming
they are constant speed compressor devices) and when there is
little load, the hot water that they produce will circulate
through the system and return to the heat pump with only a small
drop in temperature. Heat pumps don't like their return
temperature to get too high and they shut themselves off if it
does. I learned that the hard way in an actual building after not
believing what TRNSYS was telling me!! <br>
</p>
<p> As for the heat pump data file, if you have access to the TESS
HVAC library you will find heat pumps that use a normalized data
file meaning that they can be resized by adjusting a few
parameters rather than by recreating the data file.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 03/24/2021 12:10, Luis Santos via
TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CALhB1ENpHszhNZc1p+fKMKhT+WtzE1SgYFqRP-EMSwASTDcBNQ@mail.gmail.com">
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<div dir="ltr">Hello,
<div><br>
</div>
<div>I´m new to the software TRNSYS and I´m still confused about
how many and which components do I need for my simulations.</div>
<div>The site is located in Cork (Ireland) and its present
heating system relies on a gas-fired boiler. For my master
thesis I need to simulate the performance of the boiler
itself, a geothermal heat pump (both connected to radiators)
and at last the GSHP connected to a theoretical underfloor
heating. I don´t have any informations about the piping system
nor the circulating pumps, and I´m wondering if I need a
storage tank. A central heating (church) needs a tank, or can
the water be transferred directly to the radiators?</div>
<div>I want to use a water-to-water heat pump
(geothermal/vertical) to heat a church with radiators. Since
the climate doesn´t require any cooling, the heat pump should
only be applied for heating purposes. After one chooses a heat
pump of a certain manufacturer, do we need to insert the
values manually in the external files? I´ve seen examples
where there are more than 500 lines in Excel, is there an
easier way to do this?</div>
<div><br>
</div>
<div>I´m sorry for the long and complicated text. Thank you in
advance</div>
<div><br>
</div>
<div>Luís </div>
<div>Master in Thermal Energy </div>
<div>FEUP</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
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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
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<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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