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<p class="MsoNormal"><span lang="EN-US">Hello, <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">It is the first thime I send a request to the trnsys users community, but I often look at the archives, which I find very useful.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have a question regarding the c-value of the frame to be entered in the window type description :
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">It is said that </span><span lang="EN-US" style="font-size:10.0pt">the cframe-value has to be entered without the heat transfer coefficients
</span><span style="font-size:10.0pt">á</span><span lang="EN-US" style="font-size:6.5pt">o
</span><span lang="EN-US" style="font-size:10.0pt">and </span><span style="font-size:10.0pt">á</span><span lang="EN-US" style="font-size:6.5pt">i
</span><span lang="EN-US" style="font-size:10.0pt">.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">I usually calculate the Uframe to be entered using the following equation :</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><img width="368" height="45" id="Image_x0020_1" src="cid:image003.jpg@01CC9555.9FE55F30"><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">As Uw, Uglass and fframe are generally known from the beginning as a performance level requirement for the building.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">My question is : how can we relate the Uframe of the above equation and the c-value to be entered?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">Is it ok to write that Uframe = 1/[RSo + RSi + (1/cframe-value)]?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">With RSo = 1/ </span>
<span style="font-size:10.0pt">á</span><span lang="EN-US" style="font-size:6.5pt">o
</span><span lang="EN-US" style="font-size:10.0pt">= 0.04 m².K/W ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">With RSi = 1/ </span>
<span style="font-size:10.0pt">á</span><span lang="EN-US" style="font-size:6.5pt">i
</span><span lang="EN-US" style="font-size:10.0pt">= 0.13 m².K/W ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">If not ok could somenone tell the right method to enter the c-value in order to obtain the desired Uwindow?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">Great thanks !<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">Tanguy (Lyon)</span><span lang="EN-US" style="font-size:6.5pt"><o:p></o:p></span></p>
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