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<p>Jacopo,</p>
<p> You are on the right track with Type690 and a heat pump. The
assumption when generating heating and cooling loads is that the
zone temperature is controlled. The idea of Type690 is to impose
those loads on a lumped capacitance to turn them back into
temperatures so that you can implement a thermostat that controls
a heat pump whose energy addition/removal is also imposed on the
lump to try and keep it at a controlled temperature. The key is to
tune the lump so that it reacts to the load and the input from the
heat pump in the same way that the original zone does.<br>
</p>
<p> Another valid approach would be to use Type682. The idea here is
that you impose the heating and cooling loads on a liquid stream.
As an aside, there is also Type693 if you want to impose the loads
on an air stream. The Type682 solution is ideal if you are
modeling a central plant and if your loads include the energy
consumption of the terminal delivery devices. If your heat pumps
are zonal then things get a little more tricky and you're not
going to use the heat pumps to directly impact the liquid stream.
Instead you're going to give the heat pump the entering water
temperature and the control mode (heating or cooling). You're
going to use the heat pump's outputs for compressor energy to
modify your zone loads. It sounds more complicated than it is and
if you are using v18 I can make you an example of how it might
work.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<p><br>
</p>
<p> <br>
</p>
<div class="moz-cite-prefix">On 05/09/2022 04:44, Jacopo Valente via
TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:DB6PR06MB39598F0D381EC3D44E898F34A6C69@DB6PR06MB3959.eurprd06.prod.outlook.com">
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<p class="MsoNormal">Dear TRNSYS users,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am trying to simulate a system for the
conditioning of a building, in particular first an air-to-air
heat pump system and then a water-to-water heat pump system.
In my case I haven’t the building modeling like using type56,
but I have the required loads in both heating and cooling
mode. I have the tess library and I tried to connect the heat
pump to the type690, but I'm not sure it's the correct choice.
Which is the type most suitable for reading the loads and
controlling the zone temperature?<o:p></o:p></p>
<p class="MsoNormal"><br>
Best regards,<br>
Jacopo<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
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<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
<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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