[bldg-sim] Curtain Wall

[Chris Jones]

The performance of spandrel panels is very poor depending on the curtain 
wall thermal break.  The typical commercial curtain wall has a 3 mm 
polyvinyl strip punctured by bolts.  Depending on the size of spandrel 
panel, the overall R-value will be 50-70% less than the insulation 
value.  If the curtain wall has a good thermal break - 19 mm is typical for 
best systems, then you will see a reduction of about 35%.

For an accurate estimate of curtain wall performance (spandrel and glazing) 
see http://p10a.enermodal.com/WebFPlus/

At 17:34 18/11/2005, you wrote:
>Vision panels should be modelled as windows, but the spandrel (opaque) 
>areas will be external walls.  In this case your spandrel glass will be 
>conductive and absorptive, but will not transmit as it isn't a window ... 
>Spandrel glass is often colour back and will thus is usually very 
>absorptive.  Layering of the external wal layers will be like any other 
>construction, but be mindful of the aluminium bridging if there are no 
>thermal breaks.
>----- Original Message -----
>From: <mailto:jaya_mukho at yahoo.com>Jaya Mukhopadhyay
>To: <mailto:bldg-sim at gard.com>bldg-sim at gard.com
>Sent: Friday, November 18, 2005 4:31 AM
>Subject: [bldg-sim] Curtain Wall
>
>Hello!
>I am currently modeling a curtain wall in DOE-2.1e.
>Its a simple structure constructed with steel and glass
>Can anybody suggest an effective way of modeling such a structure?
>Thanks
>Jaya Mukhopadhyay
>ps: I am very grateful for the great response I got from many members of 
>this listserve regarding my schedules question. Thanks!
>
>
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Chris Jones, P.Eng.
14 Oneida Avenue
Toronto, ON M5J2E3
Tel. 416 203-7465
Fax. 416 946-1005 

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