Hello,
I am modeling a building with a glass curtain wall, as displayed below:
The building has an enormous amount of window and uses green low-e glass system.
Usually, I developed a model with solar distribution type: Full Interior and Exterior
However, for this building, I get an error message like this:
Severe ** Problem in interior solar distribution calculation (CHKBKS)
** ~~~ ** Solar Distribution = FullInteriorExterior will not work in Zone=FLOOR 4 - 8
** ~~~ ** because vertex 1 of back surface=SURFACE 21 is in front of receiving surface=SURFACE 24
** ~~~ ** (Dot Product indicator=20230.0000)
** ~~~ ** Check surface geometry; if OK, use Solar Distribution = FullExterior instead.
The error comes for surface 23 and 24. Those surfaces are the surface with biggest WWR, facing each other in 90deg. When I delete the subsurface on surface 23 and 24, and use Full Interior Exterior solar distribution, the error disappears.
Also when I use the Full Exterior solar distribution with my current geometry, it works without error.
I am looking at the explanation of the differences between Full Exterior and Full Interior Exterior distribution here in InputOutput Reference.
However, I am not sure whether it would bring significant changes or not in term of the result.
With my current building condition, is it enough to only use Full Exterior distribution, or do I need to repair the model somewhere so it could work with Full Interior and Exterior distribution?
