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Dear Karol<div><br></div><div>As you said, you have to change the time step to smaller values and see if the problem is resolved or not as the first option.<br><br>Arian </div><div><br><a href="https://overview.mail.yahoo.com/?.src=iOS">Sent from Yahoo Mail for iPhone</a><br><br><p class="yahoo-quoted-begin" style="font-size: 15px; color: #715FFA; padding-top: 15px; margin-top: 0">On Tuesday, August 16, 2022, 5:51 PM, karol.bandurski--- via TRNSYS-users <trnsys-users@lists.onebuilding.org> wrote:</p><blockquote class="iosymail"><div id="yiv2663677189"><style><!--
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--></style><div><div class="yiv2663677189WordSection1"><p class="yiv2663677189MsoNormal"><span lang="EN-US">Dear Experts.</span></p><p class="yiv2663677189MsoNormal"><span lang="EN-US"> </span></p><p class="yiv2663677189MsoNormal"><span lang="EN-US">We get convergence problem in Type 56. According to our investigation source of error is sudden increase of ventilation flow in our schedule and ventilation air temperature about 3 K lower then room air temperature.</span></p><p class="yiv2663677189MsoNormal"><span lang="EN-US">We would like to keep this control schedule and the same time avoid convergence problem.</span></p><p class="yiv2663677189MsoNormal"><span lang="EN-US"> </span></p><p class="yiv2663677189MsoNormal"><span lang="EN-US">So far we have increase indoor air heat capacity in zones (five times), it help a bit.</span></p><p class="yiv2663677189MsoNormal"><span lang="EN-US"> </span></p><p class="yiv2663677189MsoNormal"><span lang="EN-US">Do you have any other ideas what we could do?</span></p><p class="yiv2663677189MsoNormal"><span lang="EN-US">Should we change something in Control Cards?</span></p><p class="yiv2663677189MsoNormal"><span lang="EN-US"> </span></p><p class="yiv2663677189MsoNormal"><span lang="EN-US">Best,</span></p><p class="yiv2663677189MsoNormal"><span lang="EN-US">Karol </span></p><p class="yiv2663677189MsoNormal"><span lang="EN-US"> </span></p><p style="background:white;" class="yiv2663677189MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial", sans-serif;color:black;">---------------------------------------------------------------------------</span></p><p style="background:white;" class="yiv2663677189MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial", sans-serif;color:black;">Karol BANDURSKI Ph.D, Assistant Professor </span></p><p style="background:white;" class="yiv2663677189MsoNormal"><span lang="EN" style="">Faculty of Environmental and Energy Engineering </span><span lang="EN" style=""></span></p><p style="background:white;" class="yiv2663677189MsoNormal"><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 style="background:white;" class="yiv2663677189MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial", sans-serif;color:black;">Poznan University of Technology</span></p><p class="yiv2663677189MsoNormal"><span style=""><a rel="nofollow noopener noreferrer" target="_blank" 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="yiv2663677189MsoNormal"><span style="">***</span></p><p style="background:white;" class="yiv2663677189MsoNormal"><span style="font-size:10.0pt;font-family:"Arial", sans-serif;color:black;">dr inż. Karol BANDURSKI, Adiunkt</span><span style=""></span></p><p class="yiv2663677189MsoNormal"><span style="">Wydział Inżynierii Środowiska i Energetyki</span></p><p class="yiv2663677189MsoNormal"><span style="font-size:10.0pt;font-family:"Arial", sans-serif;color:black;">Zakład Ogrzewnictwa, Klimatyzacji i Ochrony Powietrza</span></p><p class="yiv2663677189MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial", sans-serif;color:black;">Politechnika Poznańska</span><span lang="EN-US" style=""></span></p><p class="yiv2663677189MsoNormal"> </p></div></div></div>_______________________________________________<br>TRNSYS-users mailing list<br><a ymailto="mailto:TRNSYS-users@lists.onebuilding.org" href="mailto:TRNSYS-users@lists.onebuilding.org">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><br><blockquote></blockquote></blockquote></div>
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