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<p class="MsoNormal">Dears, <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Could anyone can tell me why trnflow solver has the problem of the convergence when the building zone heating type has a high radiative part, please?<o:p></o:p></p>
<p class="MsoNormal">For example, I have a one-zone building with <o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">a heating type of 9000 kJ/h and radiative part of 0.9, the zone temperature is set at 20 °C<o:p></o:p></li></ul>
<p class="MsoListParagraph"> CR_001 DS_001<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">trnflow network with EN_01
<span style="font-family:Wingdings">à</span> ZONE_01 <span style="font-family:Wingdings">
à</span> EN_02<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img width="520" height="134" style="width:5.4166in;height:1.3958in" id="Picture_x0020_1" src="cid:image001.png@01D459DE.3A834440"><o:p></o:p></p>
<p class="MsoNormal">For launching the simulation, I had the problem with internal convergence of trnflow:
<b>Convergence of the internal iteration of TYPE 56 not attained within 100max. number of internal iteration.<o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">When I decrease the radiative part of heating type to <b>0.8</b> the simulation work well without any error.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any help will be appreciated!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you very much.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Long<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">-----------<o:p></o:p></p>
<p class="MsoNormal"><b>Van Long LE<o:p></o:p></b></p>
<p class="MsoNormal">Research Engineer<o:p></o:p></p>
<p class="MsoNormal">Energy & Building<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Cenaero ASBL<o:p></o:p></b></p>
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