<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:x="urn:schemas-microsoft-com:office:excel" 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=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@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:DE;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Nur Text Zchn";
margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:DE;}
span.NurTextZchn
{mso-style-name:"Nur Text Zchn";
mso-style-priority:99;
mso-style-link:"Nur Text";
font-family:"Calibri",sans-serif;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;
mso-fareast-language:DE;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1219972640;
mso-list-type:hybrid;
mso-list-template-ids:198062492 -329505782 134807555 134807557 134807553 134807555 134807557 134807553 134807555 134807557;}
@list l0:level1
{mso-level-number-format:bullet;
mso-level-text:-;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-font-family:"Times New Roman";}
@list l0:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level3
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l0:level4
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level6
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l0:level7
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level9
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l1
{mso-list-id:1289316788;
mso-list-type:hybrid;
mso-list-template-ids:1783549944 134807567 134807577 134807579 134807567 134807577 134807579 134807567 134807577 134807579;}
@list l1:level1
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level3
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l1:level4
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level6
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l1:level7
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l1:level9
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></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="EN-GB" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoPlainText"><span lang="DE">Dear Wirich,<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText">" Flow matrix is singular" means, that the flow network cannot be solved. This can happen if nodes are not well connected. Two rules must be applied here:<o:p></o:p></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoPlainText" style="margin-left:0cm;mso-list:l1 level1 lfo2">All nodes have to be connected in
<b>one</b> network<o:p></o:p></li><li class="MsoPlainText" style="margin-left:0cm;mso-list:l1 level1 lfo2">Dead ends are not allowed.<o:p></o:p></li></ol>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">In your model, rule1 is applied but rule2 not (see red circle in the ).<o:p></o:p></p>
<p class="MsoPlainText"><img width="519" height="326" style="width:5.4062in;height:3.3958in" id="Grafik_x0020_1" src="cid:image003.jpg@01D3682B.67ACD9E0"><o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">I connected them with three dummy cracks to make it work…<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><b><span style="font-size:10.0pt">LINK CR_001 : ID= 29 : FRNODE= P4 : TONODE= CELLIER : FRHEIGHT= 0 : TOHEIGHT= 0 : WIOWNHF= 1 : FSCALE= 1<o:p></o:p></span></b></p>
<p class="MsoPlainText"><b><span style="font-size:10.0pt">LINK CR_001 : ID= 32 : FRNODE= CELLIER : TONODE= WC : FRHEIGHT= 0 : TOHEIGHT= 0 : WIOWNHF= 1 : FSCALE= 1<o:p></o:p></span></b></p>
<p class="MsoPlainText"><b><span style="font-size:10.0pt">LINK CR_001 : ID= 33 : FRNODE= WC : TONODE= SDB : FRHEIGHT= 0 : TOHEIGHT= 0 : WIOWNHF= 1 : FSCALE= 1<o:p></o:p></span></b></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Best<br>
Jakob<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><span lang="DE">__________________________________________________________________________________________________<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE">Jakob Merk M.Sc.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE">Transsolar Energietechnik GmbH<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE">Curiestraße 2<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE">70563 Stuttgart<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE">http://www.transsolar.com<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE">Transsolar: KlimaEngineering- Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäuden<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE">Stuttgart – München – New York – Paris <o:p>
</o:p></span></p>
<p class="MsoPlainText"><span lang="DE">Geschäftsführer :Diplom-Ingenieur Matthias Schuler, Diplom-Ingenieur Thomas Auer, Diplom-Physiker Stefan Holst, Diplom-Betriebswirt Dieter Schnelle<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE">Eingetragen beim Amtsgericht Stuttgart HRB 23347,
<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE">Steuernummer: 99073/00911,USt-IdNr.: DE 152272639<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE" style="mso-fareast-language:EN-GB">-----Ursprüngliche Nachricht-----<br>
Von: TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org] Im Auftrag von Wirich via TRNSYS-users<br>
Gesendet: 24 November 2017 18:13<br>
An: trnsys-users@lists.onebuilding.org<br>
Cc: freppelw@noirot.fr<br>
Betreff: [TRNSYS-users] Problem Ventilation in TRNFLOW</span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE">Hi everyone,<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE">I'm still encountering the same problem about ventilation in my project.
<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE">I've set all the ventilation network, and then I closed all the windows.
<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE">There is no heating device in the building.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE">I don't understand why, but at around 749 hours, I encounter this error:<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE"> COMIS MESSAGE ***** ERROR *****<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"> Flow matrix is singular ! This might be caused by a zone that has no<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"> ventilation at all in this condition.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"> Age of air and air change efficiency output is invalid !<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE">And this occurs until the end of the simulation, though the simulation runs until the end. I only found that when I opened the .cer file.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE">Moreover, when I put a heating device in a room, with limited power, the simulation stops before the end, saying that convergence was not reached. Do you think this is related to the COMIS ERROR I showed just before?<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE">If someone can help me, I attach all my project to this mail, with an illustration, in order to better understant what I did. I used TRNSYS17.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE">Thank you in advance.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE">King Regards<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE">Wirich<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="DE">PhD student<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="DE">Laboratoy of innovative technologies, University of Picardie Jules Vernes Avenue des Facultés, Salouël<o:p></o:p></span></p>
</div>
</body>
</html>