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R: [EnergyPlus_Support] Vented Facade

Brent,

 

In the specific case I?m simulating a simple external surface with thin
ceramic and with a gap of 3 inches, that is suppose of generate chimney
effects.

The not realistic thing is that the temperature of the baffle (ceramic) for
example in 21 July at 12 is 80°C, the cavity is 50° and the outside face of
the support wall is around 70°C. It seems that the buffle? protection from
the sun isn?t calculated. 

 

I was wondering if I have to set any parameters in ?construction with
internal source? or maybe describe the ceramic external layer in
?surface:shading:detached:fixed?

Thank you very much.

 

Emanuele, 

Which surface temperatures of the support wall are you refering to? inside
or outside?   Check what you have set for OutsideFaceEnvironment -- it
should be OtherSideConditionsModel

Brent



-----Original Message-----
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]On Behalf Of Emanuele Naboni
Sent: Wednesday, March 15, 2006 11:35 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Vented Facade


Hi everybody,

I'm simulting as well an opaque ventilated facade, It works and is
very intersting!
The baffle and the cavity have very realistic values.

The only problem is about the effects it does on the wall where is applied:
running a simulation with a vent facade and running another one
without vent facade gives the same temperatures on the support wall.
have anyone verify that?

I'm very intersted too in the Cd values.
Emanuele





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