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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt'>Dear
users, <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'>I have a question concerning section 2.1.7. of the Type 56 user’s
manual : “2. General Mathematical Description of the Thermal Model”
> “2.1.7. The Long-wave radiation”.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'>My question is concerning the formulation of the net radiative heat transfer
with surfaces in view of the outside surface, q_r,s,o. We can read :<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'>q_r,s,o = sigma * epsilon_s,o * (T_s,o^4 – T_fsky^4)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'>that I understand as the net losses of the outside surface by long wave
radiation. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'>However, q_r,s,o is counted as a gain in the energy balance (with a
plus sign) : <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'>q_s,o = q_comb,s,o + S_s,o<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'>with q_comb,s,o = q_c,s,o + q_r,s,o<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'>(see figure 3 “Surface heat flux and temperature”, section
2,1,5. for the nomenclature)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'>How does it happen? How is the heat transfer by long wave radiation
really taken into account in Type 56? <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'>Thanks for your help.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'>Kind regards, <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face=Arial><span lang=EN-GB
style='font-size:12.0pt;color:navy'>Charles LAUNAY</span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=3 face=Arial><span lang=EN-GB style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><strong><b><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy;font-weight:normal'>CEA INES<o:p></o:p></span></font></b></strong></p>
<p class=MsoNormal><b><font size=3 face=Arial><span style='font-size:12.0pt;
font-weight:bold'><o:p> </o:p></span></font></b></p>
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