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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Ok, according to the manual I understand it is related to the timebase and the transfer functions.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Best regards, <o:p>
</o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>De :</b> TRNSYS-users <trnsys-users-bounces@lists.onebuilding.org>
<b>De la part de</b> Alain GUIAVARCH via TRNSYS-users<br>
<b>Envoyé :</b> mardi 28 septembre 2021 17:13<br>
<b>À :</b> TRNSYS users mailing list at OneBuilding.org <trnsys-users@lists.onebuilding.org><br>
<b>Cc :</b> Alain GUIAVARCH <a.guiavarch@groupeginger.com><br>
<b>Objet :</b> Re: [TRNSYS-users] heating load - 1 mn time step<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Dear Angel,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Thank you for your help.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Actually I’m not talking about the moment when the set point changes from 17°C from 20° (I agree with you this is normal).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">But when we look at what happens each hour of the day, the heat load suddenly changes every hour, even if the set point temperature doesn’t change, this is what I don’t understand : the heat load
curve looks like a « staircase ». It is the same for the temperature, so I think it doesn’t come from the heating power control.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b>De :</b> TRNSYS-users <<a href="mailto:trnsys-users-bounces@lists.onebuilding.org">trnsys-users-bounces@lists.onebuilding.org</a>>
<b>De la part de</b> Angel Carrera via TRNSYS-users<br>
<b>Envoyé :</b> mardi 28 septembre 2021 11:59<br>
<b>À :</b> TRNSYS users mailing list at OneBuilding.org <<a href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a>><br>
<b>Cc :</b> Angel Carrera <<a href="mailto:angel.carrera@aiguasol.coop">angel.carrera@aiguasol.coop</a>><br>
<b>Objet :</b> Re: [TRNSYS-users] heating load - 1 mn time step<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi Alain,<o:p></o:p></p>
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<p class="MsoNormal">I guess that you are calculating the heating load with unlimited heating power. If that's the case, you are requesting to type 56 that the building reach the setpoint temperature in 1 minute (that might be lot of energy for such a small
amount of time) and the sudden peaks in the heating load appear at times where you have a change in the setpoint temperature. I will suggest that you use a limited power for your heating device, or increase your time step to a time that you find reasonable
to heat your building. In general, smaller time steps are "better", but if you are just interested in calculating your heating load that's not necessarily true, specially if you are interested in calculating peak power. Hope it helps, best regards<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Angel<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">El mar, 28 sept 2021 a las 10:44, Alain GUIAVARCH via TRNSYS-users (<<a href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a>>) escribió:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi everybody,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I’m simulating a projet with type 56, and 1 mn time step.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I don’t understand the heating load : it varies too much each hour, like something is not interpolated (green curve in the attached file ).<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Would anybody have any idea, did I forget something ?<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Best,
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Alain Guiavarch<o:p></o:p></p>
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<p class="MsoNormal">_______________________________________________<br>
TRNSYS-users mailing list<br>
<a href="mailto:TRNSYS-users@lists.onebuilding.org" target="_blank">TRNSYS-users@lists.onebuilding.org</a><br>
<a href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a><o:p></o:p></p>
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-- <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span lang="EN-AU" style="font-size:10.0pt;font-family:"Pier Sans"">Àngel Carrera Martín</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-AU" style="font-size:7.5pt;font-family:"Pier Sans"">Consultor sènior en Sistemes</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-AU" style="font-size:7.5pt;font-family:"Pier Sans"">Llicenciat en ciencies físiques</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-AU" style="font-size:7.5pt;font-family:"Pier Sans"">Sistemes Avançats d'Energia Solar Tèrmica - AIGUASOL</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-AU" style="font-size:7.5pt;font-family:"Pier Sans""> +(00) 34 663 276 680
<span style="color:#274E13">Roger de Llúria 29, 3r 2a</span></span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-AU" style="font-size:7.5pt;font-family:"Pier Sans""><a href="mailto:angel.carrera@aiguasol.coop" target="_blank"><span style="color:black">angel.carrera@aiguasol.coop</span></a>
<span style="color:#274E13">08009 Barcelona</span></span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-AU" style="font-size:7.5pt;font-family:"Pier Sans"">
<img border="0" id="_x0000_i1025" src="http://aiguasol.coop/images/skype.jpg">angel_aiguasol
<span style="color:#274E13">Tel: (+34) 933 424 755</span></span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-AU" style="font-size:7.5pt;font-family:"Pier Sans"">
<span style="color:#274E13"><a href="http://www.aiguasol.coop/" target="_blank"><span style="color:#274E13">www.aiguasol.coop</span></a>
</span></span><o:p></o:p></p>
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