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CBECC-Com Issue - Other #773

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
Version = 2013_2b_609

Category = Other

Issue Summary:
My question is two part:

1.      I heard recently at an IES T24 training session that 
CBECC-Com/EnergyPlus has issues with modeling non-convex surfaces that are 
being shaded. Is this true, and is this the correct understanding of the issue 
(i.e. a roof that is not being shaded can be non-convex)?

2.      Is there any issue with modeling non-convex spaces? i.e. Does CBECC-Com 
have to use the “FullInteriorAndExterior” solar distribution method?

I am by no means an EnergyPlus expert, I just want to make sure I know how to 
set up my models properly. Any help would be appreciated.

Original issue reported on code.google.com by f.le...@gmail.com on 4 Sep 2014 at 10:00

GoogleCodeExporter commented 9 years ago 
The only issue I am aware of regarding this is that when 
FullInteriorAndExterior solar distribution is used, a Space (actually zone in 
EnergyPlus) cannot be convex, meaning that it cannot have surfaces which cannot 
“see” all the other surfaces.  However, CBECC-Com uses FullExterior solar 
distribution, so I don’t believe there are any issues with concave or convex 
spaces.  

A shading surface that is facing the correct direction will properly shade any 
other surface.  All surfaces are planar, so convex or concave only refers to 
combinations of surfaces, such as with a space.  I don’t believe there is any 
issue with shading a roof that is convex or concave.

Original comment by rhedr...@archenergy.com on 22 Sep 2014 at 5:17