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<DIV><FONT face=Arial size=2>Dear Trnsys users,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have some problems to implement in Trnsys Type 56
with Prebid/Trnbuild an internal shading device with known data of transmission,
reflection and absorption coefficients. I also have calculated the g-value of
the whole system (glass + shading). I don't understand how these data correspond
to the input data in Prebid/Trnbuild:</FONT></DIV>
<DIV><FONT face=Arial size=2>- internal shading factor: I have estimated this by
1 - (g glass + sunblinds)/(g glass)</FONT></DIV>
<DIV><FONT face=Arial size=2>- reflection coefficient of internal device: is
this the real reflection coefficient of the sunblinds of corresponds this to
REFLISHADE (as explained in the manual of Prebid/Trnbuild)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I also don't understand the equation 4.8.8.1.44 in
the Trnsys15 manual or (44) in Trnsys16 - Trnbuild manual that explains the
irradiation that is transmitted trough a window with an internal shading. Some
parameters in this equation aren't explained. Where e.g. can you give a value to
the 'solar transmittance of all window panes'? What is the difference between
Iref,z and I?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>best regards,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Hilde Breesch<BR>PhD student Buildings &
Climatic Control<BR>Department of Architecture & Urban Planning<BR>Ghent
University<BR>J. Plateaustraat 22, B-9000 GENT<BR>tel. +32 9 264 78 61
fax. +32 9 264 41 85<BR>e-mail: <A
href="mailto:Hilde.Breesch@UGent.be">Hilde.Breesch@UGent.be</A><BR><A
href="http://allserv.ugent.be/~hbreesch/research">http://allserv.ugent.be/~hbreesch/research</A><BR></FONT></DIV></BODY></HTML>