[BLDG-SIM] Stack Effect Calculations

[Jinchao Yuan]

Kevin,
ContamW can be used for this purpose but you need 
to prescribe the temperatures since ContamW will 
not simultaneously compute the temperatures for 
you. It is especially useful if you used 
mechanical systems in the building and you have 
some estimation about the atrium temperature 
distributions. If you need to compute the zonal 
temperatures and infiltration airflow 
simultaneously, a better solution is to use 
Transys---which includes the multi-zone airflow 
module of ContamW, I believe---to coupled airflow and thermal simulation.

Jinchao

At 01:11 PM 8/22/2007, Kevin Burke wrote:
>Dear All,
>
>I’m currently looking at problems which may 
>arise due to stack effect in a high rise mixed 
>use building in London. Although most tall 
>buildings these days have relatively good air 
>tightness the proposed building will have the 
>possibility of air penetrating the office 
>façades from about 20m to 100m (70ft to 330ft) 
>and again where there is apartments from 180m to 
>230m (600ft to 760ft). It is also possible that 
>significant infiltration will occur at the top 
>of the building. A number of lift shafts and 
>stairwells under worst case situations allow 
>this air to travel the full or close to the full height of the building.
>I have found a number of papers which discuss 
>this topic but I haven’t come across a means of 
>quickly estimating worst case scenario pressure 
>differences for individual lift shaft or 
>stairwells. Does anyone know of a calculation 
>tool or similar which could do this. I have 
>downloaded a program called COMTAMW. Does anyone 
>know if this is a useful programme for proposed 
>buildings where all the parameters are not know and may have to be estimated?
>
>Kind Regards,
>
>Kevin Burke
>
>
>
>
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