Re: [EnergyPlus_Support] My question: Construction of Glass Curtain Wall

["Michael J. Witte" <mjwitte@xxxxxxxx>]

My apologies for the delayed response, this one slipped past me.

The term "curtain wall" can mean different things to different people.  Any 
portion of the wall which transmits sunlight into the interior must be modeled 
as a window subsurface, even if it is not openable.  When you refer to the 
"dividing between the glass curtain wall", I do not understand exactly what you 
mean.  It would be helpful to have a schematic drawing of what you are modeling.

Mike


On 26 Mar 2004, at 10:22, zhen tian wrote:

> Hi, Mike:
> 
> Thanks for your help. I still have some questions for your comment. 
> 
> 1. >> You must describe an opaque base wall surface and then place window
> subsurfaces on it.  For the opaque portion, you cannot use material:windowglass.
>  If your opaque sections have a glass exterior layer, then you need to describe
> a material:regular layer with the appropriate thermal properties.
> 
> The buidling I am going to model is a 7-level curtain wall building and all the
> exterior wall is almost glass curtain wall. So the transparent property will
> affect the daylighting and solar radiation. Can I define it as regular layer? 
> 
> 2.>> The divider between the glazing can be described using window frame and
> divider objects.  Or, if the dividing section is just a section of the opaque
> base wall, you do not need to describe anything additional.
> 
> The dividing is between the glass curtain wall, not the window. The dividing is
> very large and can not be ignored becase of the Thermal Bridge consideration.
> Could you you tell me what is the better option?
> 
> Thanks you.
> 
> Best regards,
> 
> David Tian
> 
> 
> 
> 
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