Maybe modelling the cavity as sunspace might work - it will not take care of the cavity ventilation part but will probably work for the solar radiation part (not sure if sunspace allows for daylighting - you will have to check on that.)<br>
Another option would be to use EnergyPlus - I think it has an example file for double facade.<br><br>-Rohini<br><br><div class="gmail_quote">On Thu, Nov 11, 2010 at 8:58 AM, Sami, Vikram <span dir="ltr"><<a href="mailto:Vikram.Sami@perkinswill.com" target="_blank">Vikram.Sami@perkinswill.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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<p class="MsoNormal">We are doing a project in a pretty cold climate. The project
design has a really big glass façade facing south. One of the ideas to reduce
conductive heat loss is to create a double skin façade on the south side.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Now I realize that this is going to take a fair amount of
analysis work to design it properly. What I was wondering is if there is a
quick analysis tool/methodology to tell if this is even feasible to go into
more detailed analysis. </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Any help would be much appreciated</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><b><span style="font-size: 9pt; color: gray;">Vikram Sami</span></b><span style="font-size: 9pt; color: gray;">, LEED AP</span></p>
<p class="MsoNormal"><span style="font-size: 9pt; color: gray;">Sustainable Design Analyst</span></p>
<p class="MsoNormal"><span style="font-size: 9pt; color: gray;">1382 Peachtree St. NE, Atlanta, GA
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<a href="mailto:vikram.sami@perkinswill.com" target="_blank">vikram.sami@perkinswill.com</a> </span><a href="http://www.perkinswill.com/" target="_blank"><span style="font-size: 9pt; color: gray; text-decoration: none;">www.perkinswill.com</span></a><span style="font-size: 9pt; color: gray;"></span></p>
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<br></blockquote></div><br><br clear="all"><br>-- <br>--------------------------------------------------------------------------------<br>Rohini Brahme, Ph.D. LEED AP<br>Building energy analysis, tool development, and training<br>
Dallas/Fort Worth, TX<br><br>