<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
</head>
<body>
<style type="text/css" style="display:none;"><!-- P {margin-top:0;margin-bottom:0;} --></style>
<div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif;" dir="ltr">
<p>Dear Marie-Hélène,</p>
<p><br>
</p>
<p>in TRNSYS 18, for internal calculation of the convective heat transfer coefficients, you have to choose between the three options floor, ceiling or vertical wall.<br>
</p>
<p><img size="0" contenttype="image/png" style="max-width: 99.9%;" id="img876472" tabindex="0" src="cid:0599e734-e97b-4328-9562-37bdf09fb623"></p>
<p><br>
</p>
<p>The formula to describe <span>the convective heat transfer coefficients</span> can be found in Chapter 5.2.3.2 of the documentation:</p>
<p><img size="0" contenttype="image/png" style="max-width: 99.9%;" id="img688384" tabindex="0" src="cid:54d582f6-5df5-436b-8c93-604f7c8823af"></p>
<p><br>
</p>
<p>Coefficients const and exp can be adjusted here:</p>
<p><img size="0" contenttype="image/png" style="width: 545px; height: 615.899px;" id="238337_rs|3" tabindex="0" width="545" height="616" src="cid:bf5c1e73-f1a6-4d71-b095-b4b7aa0026ad"><br>
</p>
</div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<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 Marie-Hélène via TRNSYS-users <trnsys-users@lists.onebuilding.org><br>
<b>Gesendet:</b> Donnerstag, 27. Juli 2017 21:50:29<br>
<b>An:</b> trnsys-users@lists.onebuilding.org<br>
<b>Betreff:</b> [TRNSYS-users] Type 56 – Parameter for internal calculation of heat transfer coefficients – Default values for floor and ceiling</font>
<div> </div>
</div>
<div>
<div dir="ltr">
<p class="MsoNormal">Dear users,<br>
</p>
<p class="MsoNormal"><br>
</p>
<p class="MsoNormal"><span lang="EN-CA">I would like to know if the parameters for internal calculation of heat transfer coefficients (constant and exponent) are the same for a floor or a ceiling than for a wall (which is a vertical surface)? In my model, ceiling
and floor are unheated and unchilled.<span></span></span></p>
<p class="MsoNormal"><span lang="EN-CA"><br>
</span></p>
<p class="MsoNormal">Kind regards,</p>
<div>
<div class="gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr">
<div>
<div dir="ltr">
<div>
<div style="color:rgb(0,0,0);margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">
<b><span style="font-size:9pt;font-family:"Arial Unicode MS",sans-serif"><br>
</span></b></div>
<div style="color:rgb(0,0,0);margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">
<b><span style="font-size:9pt;font-family:"Arial Unicode MS",sans-serif">Marie-Hélène Talbot</span></b><span style="font-size:8pt;font-family:"Arial Unicode MS",sans-serif"> </span><span style="font-size:8pt">| </span><span style="font-family:"Arial Unicode MS",sans-serif;font-size:11px">Étudiante
à la maîtrise</span></div>
<div style="color:rgb(0,0,0);margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">
<span style="font-family:"Arial Unicode MS",sans-serif;font-size:11px">Énergies renouvelables et efficacité énergétique</span></div>
<div style="color:rgb(0,0,0);margin:0cm 0cm 0.0001pt;font-family:Calibri,sans-serif">
<span style="font-family:"Arial Unicode MS",sans-serif"><span style="font-size:8pt">Département de génie de la construction<u></u><u></u></span></span></div>
<div style="color:rgb(0,0,0);margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">
<span style="font-size:8pt;font-family:"Arial Unicode MS",sans-serif">École de technologie supérieure</span></div>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>