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<div dir="ltr" data-setdir="false">Ciao,</div><div dir="ltr" data-setdir="false">si sono Italiano.</div><div dir="ltr" data-setdir="false">Io ho pensato di fare in questo modo con un equazione.</div><div dir="ltr" data-setdir="false">Creo un comando di accensione del free cooling: Free_cooling = GE*(T_amb,18) in questo modo stabilisco un segnale di accensione del free cooling per temperature esterne maggiori di 18°C.</div><div dir="ltr" data-setdir="false">Poi regolo la portata d'aria in questo modo: portata= (profilo_aria*Free_cooling*GE(T_amb,24) + 0.6*LE(T_amb,24))* C_season. In questo modo faccio si che quando il free cooling può essere utile, se la temperatura esterna è maggiore di 24 gradi allora parte mentre se è minore no. Con 24 indico la temperatura interna all'edifico di confort abbassata di 2°C .</div><div dir="ltr" data-setdir="false">Può andare?</div><div dir="ltr" data-setdir="false">Perchè mi serve un vincolo sulla minima temperatura esterna al di sotto della quale non voglio free colling ed un vincolo che mi dica quando serve davvero attivarlo ( quindi temperatura esterna maggiore di 24 gradi).</div><div dir="ltr" data-setdir="false">Grazie e cordiali saluti.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Angeli FIlippo<br></div><div><br></div>
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Il mercoledì 6 gennaio 2021, 09:07:46 CET, Toni Calabrese via TRNSYS-users <trnsys-users@lists.onebuilding.org> ha scritto:
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<p class="yiv2243891434MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US">Hallo Filippo,</span></p>
<p class="yiv2243891434MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US">I suppose that you are Italian. In case let me know and I will write you in Italian.</span></p>
<p class="yiv2243891434MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US"> </span></p>
<p class="yiv2243891434MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US">If you want to model the night cooling, you can follow two approaches:</span></p>
<p class="yiv2243891434MsoListParagraph" style=""><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US"><span style="">1.<span style="font:7.0pt New;">
</span></span></span><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US">You could use Type 2 (controller) in order to get 1 in case the external temperature is lower than a certain value</span></p>
<p class="yiv2243891434MsoListParagraph" style=""><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US"><span style="">2.<span style="font:7.0pt New;">
</span></span></span><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US">You could use an equation. Please have a look in the EQUATION Statement and you can learn how to set an equation
with the function "GT" or "LT".</span></p>
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<p class="yiv2243891434MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US">You can follow the first or the second approach depending on your experience with TRNSYS. Maybe it would be easier for you
to start with the second approach.</span></p>
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<p class="yiv2243891434MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US">I hope I helped you</span></p>
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<p class="yiv2243891434MsoNormal" style="margin-top:4.0pt;"><b><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;">Toni Calabrese</span></b><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;">, MSc.</span><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;"></span></p>
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<p class="yiv2243891434MsoNormal"><b><span style="font-size:11.0pt;font-family:sans-serif;" lang="EN-US">From:</span></b><span style="font-size:11.0pt;font-family:sans-serif;" lang="EN-US"> TRNSYS-users <trnsys-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Filippo Angeli via TRNSYS-users<br clear="none">
<b>Sent:</b> Tuesday, January 5, 2021 8:25 PM<br clear="none">
<b>To:</b> trnsys-users@lists.onebuilding.org<br clear="none">
<b>Cc:</b> Filippo Angeli <filippoangeli24@yahoo.it><br clear="none">
<b>Subject:</b> [TRNSYS-users] night free cooling</span></p>
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<p class="yiv2243891434MsoNormal"><span class="yiv2243891434ydp877753f0jlqj4b"><span style="font-size:10.0pt;font-family:sans-serif;" lang="EN">Good evening, I want to include night free cooling in my building during the summer season.</span></span><span class="yiv2243891434ydp877753f0viiyi"><span style="font-size:10.0pt;font-family:sans-serif;" lang="EN">
</span></span><span class="yiv2243891434ydp877753f0jlqj4b"><span style="font-size:10.0pt;font-family:sans-serif;" lang="EN">How can I build a function that regulates the night ventilation air flow rate, so that free cooling occurs when I have an external temperature
greater than 15 ° C? Furthermore, I want night free cooling to occur only in certain external temperature conditions (for example greater than 24 ° C).</span></span><span class="yiv2243891434ydp877753f0viiyi"><span style="font-size:10.0pt;font-family:sans-serif;" lang="EN">
</span></span><span class="yiv2243891434ydp877753f0jlqj4b"><span style="font-size:10.0pt;font-family:sans-serif;" lang="EN">Thanks a lot.</span></span><span style="font-size:10.0pt;font-family:sans-serif;"></span></p>
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