<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=iso-8859-2"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.Stylwiadomocie-mail17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=PL link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Dear Experts.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><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.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>We would like to keep this control schedule and the same time avoid convergence problem.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>So far we have increase indoor air heat capacity in zones (five times), it help a bit.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Do you have any other ideas what we could do?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Should we change something in Control Cards?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Best,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Karol <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:PL'>---------------------------------------------------------------------------<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:PL'>Karol BANDURSKI Ph.D, Assistant Professor <o:p></o:p></span></p><p class=MsoNormal style='background:white'><span lang=EN style='mso-fareast-language:PL'>Faculty of Environmental and Energy Engineering </span><span lang=EN style='mso-fareast-language:PL'><o:p></o:p></span></p><p class=MsoNormal style='background:white'><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:PL'>Division of Heating, Air Conditioning and Air Protection <o:p></o:p></span></p><p class=MsoNormal style='background:white'><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:PL'>Poznan University of Technology<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:PL'><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='mso-fareast-language:PL'><o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:PL'>***<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:PL'>dr inż. Karol BANDURSKI, Adiunkt</span><span style='mso-fareast-language:PL'><o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:PL'>Wydział Inżynierii Środowiska i Energetyki<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:PL'>Zakład Ogrzewnictwa, Klimatyzacji i Ochrony Powietrza<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:PL'>Politechnika Poznańska</span><span lang=EN-US style='mso-fareast-language:PL'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>