[Bldg-sim] Is there a quick model for double skins facades?

[Harris Poirazis]

Vikram,
There is a number of tools that allow you to assess the DSF performance.

Simple, non commercial (freeware) tools you can use are WIS 3 (for steady state boundary conditions) and Parasol for dynamic calculations (tool also that implements - if I am not wrong - the 15099 standard).

As to dynamic thermal modelling tools you can use Energy Plus, or other commercially available tools; I have worked in the past with IDA ICE 3.0 (there is the newer version IDA ICE 4.0 available) that will allow you to assess DSF performance. In fact, I found IDA ICE very useful since I could assess the performance of several DSF types (naturally ventilated, mechanically ventilated, hybrid, airflow windows) and geometries (box windows, multi storey facades (see PhD thesis "Single and Double Skin Glazed Office Buildings. Analyses of Energy Use and Indoor Climate" http://www.ebd.lth.se/fileadmin/energi_byggnadsdesign/images/Publikationer/Bok_Dokt_avhandling_HP_G5.pdf).

DSF software validation was carried out under the IEA Task 34 Task (http://www.iea-shc.org/task34/).

A description of methods and tools to assess DSF performance is extensively described under a literature review (http://www.iea-shc.org/publications/downloads/Task34-Double_Skin_Facades_A_Literature_Review1.pdf).

I hope this helps.

Best regards,
Harris Poirazis


Harris Poirazis
Engineer

Arup
13 Fitzroy Street  London W1T 4BQ  United Kingdom
t +44 20 7636 1531  d +44 20 7755 4546
www.arup.com

From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Sami, Vikram
Sent: 11 November 2010 14:59
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Is there a quick model for double skins facades?

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.

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.

Any help would be much appreciated

Vikram Sami, LEED AP
Sustainable Design Analyst
1382 Peachtree St. NE, Atlanta, GA 30309
t: 404-443-7462    f: 404.892.5823       e: vikram.sami at perkinswill.com   www.perkinswill.com<http://www.perkinswill.com/>
Perkins+Will.  Ideas + buildings that honor the broader goals of society
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