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<div dir="ltr" data-setdir="false">In pratica io voglio avere il free cooling notturno d'estate solo sotto determinate condizioni. A quel punto una volta determinate devo far si che la portata di ricambio d'aria dipenda da questo free cooling.</div><div dir="ltr" data-setdir="false">Quando invece il free cooling non lo posso usare perchè non rispetto queste condizioni di temperatura, voglio una portata di ventilazione di 0.6 m3/hrm2.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Non so se mi sono spiegato bene. <br></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>
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Il mercoledì 6 gennaio 2021, 12:26:59 CET, Toni Calabrese via TRNSYS-users <trnsys-users@lists.onebuilding.org> ha scritto:
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<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="IT">Scusami ma forse non ho capito bene cosa vuoi modellare. Sostanzialmente tu vorresti ventilare il tuo edificio in estate quando
fuori fa fresco (a esempio di sera e di notte in estate). A questo punto io penso che puoi semplicemente scrivere una equazione sul controllo che attivi il Free Cooling solo se la temperatura esterna è compresa tra 18 e 24 °C. Dovrebbe essere possibile farlo
con una equazione che contenga il "AND" o qualcosa del genere.</span></p>
<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US">In sostanza: Free_Cooling = GT(Tamb,18) AND LT(Tamb,24).</span></p>
<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="IT">E' quello che vuoi fare?</span></p>
<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="IT"> </span></p>
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<p class="yiv1232138395MsoNormal" 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="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;">SPF Institut für Solartechnik</span></p>
<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;">OST – Ostschweizer Fachhochschule</span></p>
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<p class="yiv1232138395MsoNormal"><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> Wednesday, January 6, 2021 12:04 PM<br clear="none">
<b>To:</b> Toni Calabrese via TRNSYS-users <trnsys-users@lists.onebuilding.org><br clear="none">
<b>Cc:</b> Filippo Angeli <filippoangeli24@yahoo.it><br clear="none">
<b>Subject:</b> Re: [TRNSYS-users] night free cooling</span></p>
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<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">Ciao,</span></p>
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<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">si sono Italiano.</span></p>
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<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">Io ho pensato di fare in questo modo con un equazione.</span></p>
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<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">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.</span></p>
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<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">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 .</span></p>
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<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">Può andare?</span></p>
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<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">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).</span></p>
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<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">Grazie e cordiali saluti.</span></p>
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<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">Angeli FIlippo</span></p>
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<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;"> </span></p>
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<p class="yiv1232138395MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;">Il mercoledì 6 gennaio 2021, 09:07:46 CET, Toni Calabrese via TRNSYS-users <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:trnsys-users@lists.onebuilding.org" target="_blank" href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a>>
ha scritto: </span></p>
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<p class="yiv1232138395msonormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US">Hallo Filippo,</span><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
<p class="yiv1232138395msonormal"><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><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
<p class="yiv1232138395msonormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US"> </span><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
<p class="yiv1232138395msonormal"><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><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
<p class="yiv1232138395msolistparagraph"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US">1.</span><span style="font-size:7.0pt;font-family:serif;color:#1F497D;" lang="EN-US">
</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><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
<p class="yiv1232138395msolistparagraph"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US">2.</span><span style="font-size:7.0pt;font-family:serif;color:#1F497D;" lang="EN-US">
</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><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
<p class="yiv1232138395msonormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US"> </span><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
<p class="yiv1232138395msonormal"><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><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
<p class="yiv1232138395msonormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US"> </span><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
<p class="yiv1232138395msonormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;" lang="EN-US">I hope I helped you</span><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
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<p class="yiv1232138395msonormal" 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:#26282A;"></span></p>
<p class="yiv1232138395msonormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;">Wissenschaftlicher Projektmitarbeiter</span><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
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<p class="yiv1232138395msonormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;">T +41 58 257 4827</span><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
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<p class="yiv1232138395msonormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;">SPF Institut für Solartechnik</span><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
<p class="yiv1232138395msonormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;">OST – Ostschweizer Fachhochschule</span><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
<p class="yiv1232138395msonormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#1F497D;">Oberseestr. 10 | CH-8640 Rapperswil | Switzerland |
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<p class="yiv1232138395msonormal"><b><span style="font-size:11.0pt;font-family:sans-serif;color:#26282A;" lang="EN-US">From:</span></b><span style="font-size:11.0pt;font-family:sans-serif;color:#26282A;" lang="EN-US"> TRNSYS-users <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:trnsys-users-bounces@lists.onebuilding.org" target="_blank" href="mailto:trnsys-users-bounces@lists.onebuilding.org">trnsys-users-bounces@lists.onebuilding.org</a>>
<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> <a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:trnsys-users@lists.onebuilding.org" target="_blank" href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a><br clear="none">
<b>Cc:</b> Filippo Angeli <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:filippoangeli24@yahoo.it" target="_blank" href="mailto:filippoangeli24@yahoo.it">filippoangeli24@yahoo.it</a>><br clear="none">
<b>Subject:</b> [TRNSYS-users] night free cooling</span><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
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<p class="yiv1232138395msonormal"><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"> </span></p>
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<p class="yiv1232138395msonormal"><span class="yiv1232138395ydp877753f0jlqj4b"><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;" lang="EN">Good evening, I want to include night free cooling in my building during the summer season.</span></span><span class="yiv1232138395ydp877753f0viiyi"><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;" lang="EN">
</span></span><span class="yiv1232138395ydp877753f0jlqj4b"><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;" 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="yiv1232138395ydp877753f0viiyi"><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;" lang="EN">
</span></span><span class="yiv1232138395ydp877753f0jlqj4b"><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;" lang="EN">Thanks a lot.</span></span><span style="font-size:10.0pt;font-family:sans-serif;color:#26282A;"></span></p>
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