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<BODY lang=FR vLink=purple link=blue>
<DIV dir=ltr align=left><SPAN class=529025109-29042010><FONT face=Arial
color=#0000ff size=2>Dear Charles Luanay,</FONT></SPAN>
</DIV>
<DIV dir=ltr align=left><SPAN class=529025109-29042010><FONT face=Arial
color=#0000ff size=2></FONT></SPAN>
</DIV>
<DIV dir=ltr align=left><SPAN class=529025109-29042010><FONT face=Arial
color=#0000ff size=2>thanks for pointing this out! </FONT></SPAN>
</DIV>
<DIV dir=ltr align=left><SPAN class=529025109-29042010><FONT face=Arial
color=#0000ff size=2></FONT></SPAN>
</DIV>
<DIV dir=ltr align=left><SPAN class=529025109-29042010><FONT face=Arial
color=#0000ff size=2>I check the coding of this section, and the manual has a
sign error and the drawing is wrong too:</FONT></SPAN>
</DIV>
<DIV dir=ltr align=left><SPAN class=529025109-29042010><FONT face=Arial
color=#0000ff size=2><SPAN lang=EN-GB style="FONT-SIZE: 11pt"><o:p><SPAN
class=529025109-29042010></SPAN></o:p></SPAN></FONT></SPAN>
</DIV>
<DIV dir=ltr align=left><SPAN class=529025109-29042010><FONT face=Arial
color=#0000ff size=2><SPAN lang=EN-GB style="FONT-SIZE: 11pt"><o:p><SPAN
class=529025109-29042010>Instead of </SPAN></o:p></SPAN></FONT>
</DIV>
<DIV dir=ltr align=left>
<P class=MsoNormal>
<FONT color=#0000ff size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt">q_comb,s,o = q_c,s,o + q_r,s,o</SPAN></FONT>
</P>
<P class=MsoNormal><FONT color=#0000ff size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt"></SPAN></FONT>
</P>
<P class=MsoNormal><FONT color=#0000ff size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt"><o:p><SPAN class=529025109-29042010>it should
be</SPAN></o:p></SPAN></FONT>
</P></SPAN></DIV>
<P class=MsoNormal><FONT color=#0000ff size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt">q_comb,s,o = q_c,s,o <SPAN
class=529025109-29042010>-</SPAN> q_r,s,o</SPAN></FONT>
</P>
<P class=MsoNormal><FONT color=#0000ff size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt"></SPAN></FONT>
</P>
<P class=MsoNormal><FONT><SPAN lang=EN-GB style="FONT-SIZE: 11pt"><FONT
color=#0000ff><FONT size=2>q_r,s,o<SPAN class=529025109-29042010> is defined as
a loss :</SPAN></FONT></FONT></SPAN></FONT>
</P>
<P class=MsoNormal><FONT><SPAN lang=EN-GB style="FONT-SIZE: 11pt"><FONT
color=#0000ff><FONT size=2><SPAN
class=529025109-29042010></SPAN></FONT></FONT></SPAN></FONT><FONT color=#0000ff
size=2><SPAN lang=EN-GB style="FONT-SIZE: 11pt">q_r,s,o = sigma * epsilon_s,o *
(T_s,o^4 – T_fsky^4)</SPAN></FONT>
</P>
<DIV class=MsoNormal><FONT color=#0000ff><FONT color=#0000ff size=2><SPAN
lang=EN-GB style="FONT-SIZE: 11pt"></SPAN></FONT></FONT>
</DIV>
<DIV class=MsoNormal><FONT color=#0000ff><FONT size=2><FONT color=#0000ff><SPAN
lang=EN-GB style="FONT-SIZE: 11pt"><SPAN
class=529025109-29042010></SPAN></SPAN></FONT><FONT color=#0000ff><SPAN
lang=EN-GB style="FONT-SIZE: 11pt"></SPAN></FONT></FONT></FONT>
</DIV>
<DIV class=MsoNormal><FONT color=#0000ff size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt"><o:p><SPAN
class=529025109-29042010>Cheers,</SPAN></o:p></SPAN></FONT>
</DIV>
<DIV class=MsoNormal><FONT color=#0000ff><FONT color=#0000ff size=2><SPAN
lang=EN-GB style="FONT-SIZE: 11pt"><o:p><SPAN
class=529025109-29042010></SPAN></o:p></SPAN></FONT></FONT>
</DIV>
<DIV class=MsoNormal><FONT color=#0000ff size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt"><o:p><SPAN
class=529025109-29042010>Marion</SPAN></o:p></SPAN></FONT>
</DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT face=Arial color=#0000ff
size=2></FONT></FONT></FONT>
</DIV>
<DIV><SPAN class=529025109-29042010><FONT face=Arial color=#0000ff size=2>P.S.:
What version of TRNSYS are you using? The section numbering of the Type 56
user’s manual looks somwhat strange to me.</FONT></SPAN>
</DIV>
<DIV><BR>
<FONT color=#0000ff></FONT></DIV>
<DIV class=OutlookMessageHeader lang=de dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>Von:</B> LAUNAY Charles 226591
[mailto:charles.launay@cea.fr] <BR>
<B>Gesendet:</B> Donnerstag, 29. April 2010
10:25<BR>
<B>An:</B> trnsys-users@engr.wisc.edu<BR>
<B>Betreff:</B> [TRNSYS-users]
Long wave radiation in the energy balance (Type 56)<BR>
</FONT><BR>
</DIV>
<DIV></DIV>
<P>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 11pt">Dear
users, <o:p></o:p></SPAN></FONT>
</P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 11pt"><o:p> </o:p></SPAN></FONT>
</P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt">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 face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt">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 face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt">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 face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt">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 face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt"><o:p> </o:p></SPAN></FONT>
</P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt">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 face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt">q_s,o = q_comb,s,o + S_s,o<o:p></o:p></SPAN></FONT>
</P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt">with q_comb,s,o = q_c,s,o +
q_r,s,o<o:p></o:p></SPAN></FONT>
</P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt">(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 face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt"><o:p> </o:p></SPAN></FONT>
</P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt">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 face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt"><o:p> </o:p></SPAN></FONT>
</P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt">Thanks for your help.<o:p></o:p></SPAN></FONT>
</P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt"><o:p> </o:p></SPAN></FONT>
</P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt">Kind regards, <o:p></o:p></SPAN></FONT>
</P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 11pt"><o:p> </o:p></SPAN></FONT>
</P>
<P class=MsoNormal><FONT face=Arial color=navy size=3><SPAN lang=EN-GB
style="FONT-SIZE: 12pt; COLOR: navy">Charles LAUNAY</SPAN></FONT><SPAN
lang=EN-GB><o:p></o:p></SPAN>
</P>
<P class=MsoNormal><FONT face=Arial size=3><SPAN lang=EN-GB
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT>
</P>
<P class=MsoNormal><STRONG><B><FONT face=Arial color=navy size=2><SPAN
style="FONT-WEIGHT: normal; FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">CEA
INES<o:p></o:p></SPAN></FONT></B></STRONG>
</P>
<P class=MsoNormal><B><FONT face=Arial size=3><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></B>
</P></DIV>
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