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<span style="margin:0px;font-size:12pt">Dear Karol, </span>
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<div style="margin:0px;font-size:12pt">the version of type 399 that you are using is quite an old one. The type has since been updated a few times, generally we would recommend updating to TRNSYS18 and the current version of Type399.</div>
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<div style="margin:0px;font-size:12pt">In any case, the error you are getting is related to some of the constraints that have to be observed when using the TABS model in the component - which is the same that is used in Type 56, the multizone building. Please
see the Multizone Building Documentation (in the case of TRNSYS 17 it is page 5-197, see screenshot below) to learn more about the criteria that your setup has to meet for the model to work. Your error message specifically is related to the criteria in Eq.
5.4.4-31 not being met by your setup:</div>
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<div style="margin:0px;font-size:12pt"><img class="w-872 h-466" width="668" height="357" size="44289" contenttype="image/png" style="margin:0px;width:668px;height:357px" data-outlook-trace="F:1|T:1" src="cid:30596e65-1090-4023-9e42-22281ba9d1ee"><br>
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<div style="margin:0px;font-size:12pt">Therefore, you either have to increase your massflow or change the other parameters of the type that are influencing the total resistance. </div>
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<div style="margin:0px;font-size:12pt">Best regards,</div>
<span style="margin:0px;font-size:12pt">Christina</span><br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>Von:</b> TRNSYS-users <trnsys-users-bounces@lists.onebuilding.org> im Auftrag von karol.bandurski--- via TRNSYS-users <trnsys-users@lists.onebuilding.org><br>
<b>Gesendet:</b> Dienstag, 17. Mai 2022 22:38<br>
<b>An:</b> trnsys-users@lists.onebuilding.org <trnsys-users@lists.onebuilding.org><br>
<b>Cc:</b> karol.bandurski@put.poznan.pl <karol.bandurski@put.poznan.pl><br>
<b>Betreff:</b> [TRNSYS-users] type 399</font>
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<p class="x_MsoNormal"><span lang="EN-US">Dear All,</span></p>
<p class="x_MsoNormal"><span lang="EN-US"> </span></p>
<p class="x_MsoNormal"><span lang="EN-US">I try to simulate active panel with PCM material using type 399. So far I don’t have problem with passive panel (without flow in pipes), but when I set mass flow rate higher than 0 (72 or 100 kg/h) I get error:</span></p>
<p class="x_MsoNormal"><span lang="EN-US"> </span></p>
<p class="x_MsoNormal"><span lang="EN-US">*** Fatal Error at time : 0.100000</span></p>
<p class="x_MsoNormal"><span lang="EN-US"> Generated by Unit : 10</span></p>
<p class="x_MsoNormal"><span lang="EN-US"> Generated by Type : 399</span></p>
<p class="x_MsoNormal"><span lang="EN-US"> Message : specific massflow - use more segments - see type description</span></p>
<p class="x_MsoNormal"><span lang="EN-US"> </span></p>
<p class="x_MsoNormal"><span lang="EN-US">I have also try to increase number of loops (n_loops), but it isn’t help.</span></p>
<p class="x_MsoNormal"><span lang="EN-US"> </span></p>
<p class="x_MsoNormal"><span lang="EN-US">I noticed that the same problem is in Type 399 example… Example work when flow is 0, if not the same error appear.</span></p>
<p class="x_MsoNormal"><span lang="EN-US"> </span></p>
<p class="x_MsoNormal"><span lang="EN-US">I would be grateful for any advice.</span></p>
<p class="x_MsoNormal"><span lang="EN-US"> </span></p>
<p class="x_MsoNormal"><span lang="EN-US">Kind regards,</span></p>
<p class="x_MsoNormal"><span lang="EN-US">Karol Bandurski</span></p>
<p class="x_MsoNormal"><span lang="EN-US"> </span></p>
<p class="x_MsoNormal"><span lang="EN-US"> </span></p>
<p class="x_MsoNormal" style="background:white"><span lang="EN-US" style="font-size:10.0pt; font-family:"Arial",sans-serif; color:black">---------------------------------------------------------------------------</span></p>
<p class="x_MsoNormal" style="background:white"><span lang="EN-US" style="font-size:10.0pt; font-family:"Arial",sans-serif; color:black">Karol BANDURSKI Ph.D, Assistant Professor
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<p class="x_MsoNormal" style="background:white"><span lang="EN" style="">Faculty of Environmental and Energy Engineering
</span><span lang="EN" style=""></span></p>
<p class="x_MsoNormal" style="background:white"><span lang="EN-US" style="font-size:10.0pt; font-family:"Arial",sans-serif; color:black">Division of Heating, Air Conditioning and Air Protection
</span></p>
<p class="x_MsoNormal" style="background:white"><span lang="EN-US" style="font-size:10.0pt; font-family:"Arial",sans-serif; color:black">Poznan University of Technology</span></p>
<p class="x_MsoNormal"><span style=""><a href="https://www.researchgate.net/profile/Karol_Bandurski"><span lang="EN-US" style="color:blue">https://www.researchgate.net/profile/Karol_Bandurski</span></a></span><span lang="EN-US" style=""></span></p>
<p class="x_MsoNormal"><span style="">***</span></p>
<p class="x_MsoNormal" style="background:white"><span style="font-size:10.0pt; font-family:"Arial",sans-serif; color:black">dr in¿. Karol BANDURSKI, Adiunkt</span><span style=""></span></p>
<p class="x_MsoNormal"><span style="">Wydzia³ In¿ynierii Œrodowiska i Energetyki</span></p>
<p class="x_MsoNormal"><span style="font-size:10.0pt; font-family:"Arial",sans-serif; color:black">Zak³ad Ogrzewnictwa, Klimatyzacji i Ochrony Powietrza</span></p>
<p class="x_MsoNormal"><span lang="EN-US" style="font-size:10.0pt; font-family:"Arial",sans-serif; color:black">Politechnika Poznañska</span><span lang="EN-US" style=""></span></p>
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