[BLDG-SIM] natural ventilation analysis tools

[MB]

 Maybe COMIS would help.
----- Original Message ----- 
From: "Jon Hand" <jon at esru.strath.ac.uk>
To: <BLDG-SIM at gard.com>
Sent: Wednesday, October 22, 2003 9:57 AM
Subject: [BLDG-SIM] natural ventilation analysis tools


> 
> Those interested in natural ventilation and mixed mode ventilation
> might wish to check <http://www.esru.strath.ac.uk> for details
> about ESP-r. It has long offered integrated thermal and CFD analysis,
> integrated thermal and mass flow (bulk) analysis as well as
> (more recently) the possibility to integrate thermal CFD and mass flow
> assessments. It is open source so you can check out
> the underlying numerical processes and add in your
> own home-cooked wall functions or mass flow components.
> 
> Natural and nixed mode ventilation has been of long-standing
> interest in Europe and ESP-r is regularly used for such
> assessments. We know of quite a few practitioners who
> also use TAS. 
> 
> Most often engineering questions of natural 
> ventilation problems can be addressed via integrated mass
> flow and thermal assessments (there is minimal overhead
> in solving thousands of timesteps). There is still an
> art in configuring a flow network and there are gaps
> in the available components (e.g. single sided ventilation
> is a challenge) but practitioners are using simulation to
> address this routinely. 
> 
> When questions of mean age of air and local discomfort arise, CFD
> may be appropriate (for somewhat fewer timesteps). There
> is also much of an art to CFD use so some preparation is 
> required prior to real-time deployment.  
> 
> CIBSE has issued a Mixed mode ventilation applications
> manual (CIBSE AM13:2000) which covers various
> methods of evaluation, procedures for professional practice
> and information sources. It discusses in detail how one
> might deal with uncertainty in flow rates as well as 
> fall-back systems for extreme conditions. A definite must-read!
> 
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