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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hallo Filippo,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US">I suppose that you are Italian. In case let me know and I will write you in Italian.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US">If you want to model the night cooling, you can follow two approaches:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US">You could use Type 2 (controller) in order to get 1 in case the external temperature is lower than a certain value<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language: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".<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language: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.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US">I hope I helped you<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-top:4.0pt"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Toni Calabrese</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">, MSc.</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Wissenschaftlicher Projektmitarbeiter<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#8C195F"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">T +41 58 257 4827<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">SPF Institut für Solartechnik<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">OST – Ostschweizer Fachhochschule<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Oberseestr. 10 | CH-8640 Rapperswil | Switzerland |
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> TRNSYS-users <trnsys-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Filippo Angeli via TRNSYS-users<br>
<b>Sent:</b> Tuesday, January 5, 2021 8:25 PM<br>
<b>To:</b> trnsys-users@lists.onebuilding.org<br>
<b>Cc:</b> Filippo Angeli <filippoangeli24@yahoo.it><br>
<b>Subject:</b> [TRNSYS-users] night free cooling<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span class="ydp877753f0jlqj4b"><span lang="EN" style="font-size:10.0pt;font-family:"Helvetica",sans-serif">Good evening, I want to include night free cooling in my building during the summer season.</span></span><span class="ydp877753f0viiyi"><span lang="EN" style="font-size:10.0pt;font-family:"Helvetica",sans-serif">
</span></span><span class="ydp877753f0jlqj4b"><span lang="EN" style="font-size:10.0pt;font-family:"Helvetica",sans-serif">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="ydp877753f0viiyi"><span lang="EN" style="font-size:10.0pt;font-family:"Helvetica",sans-serif">
</span></span><span class="ydp877753f0jlqj4b"><span lang="EN" style="font-size:10.0pt;font-family:"Helvetica",sans-serif">Thanks a lot.</span></span><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif"><o:p></o:p></span></p>
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