[EnergyPlus_Support] Re: Simulating double skin facade

["lorenzomattarolo" <lorenzomattarolo@xxxxxxxx>]

Thanks for your answer.

I compared two simulation, one with the facade as exterior vented
cavity and the other with the facade as a simple window, and it seems
that solar transmission through the glazing system is the same in both
the cases.

Even if the exterior vented cavity is only for opaque surfaces do you
think it is possible to use the model for a glass facade, using as
input (thermal emissivity and solar absorbtivity) the data of the
glazing system?
Which differences or errors would occur using that model?

Lorenzo





--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Griffith, Brent"
<brent_griffith@...> wrote:
>
> The exterior vented natural cavity model is for *opaque* surfaces only
> and does not apply to glazing systems.  
> 
>  
> 
> There is a model for blinds in the window gap that takes those two
> things into account, but I am not sure if it works together with the air
> flow window model.  
> 
>  
> 
>  
> 
>  
> 
> ________________________________
> 
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of
> lorenzomattarolo
> Sent: Monday, August 06, 2007 7:48 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Simulating double skin facade
> 
>  
> 
> Hi,
> I'm simulating an office with a double skin facade using the "exterior
> vented natural cavity".
> The facade is naturally ventilated and it has venetian blinds in the
> gap.
> 
> The blinds are exposed to the solar radiation and they can reach
> during the day very high temperatures, which can affect 
> 1. the temperature of the air in the gap
> 2. the performance of the glass facade
> 
> Does EnergyPlus take into account these two effects?
> 
> Thanks for your help and your suggestion,
> 
> Lorenzo
> 
>  
> 
> 
> 
> [Non-text portions of this message have been removed]
>




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