[EnergyPlus_Support] Low Temp Radiant Ceiling Panels (Heating)

["berlinclownfish" <SPlamp@xxxxxxxxxxxxxxxx>]

Dear EnergyPlus support team,

I'm currently modeling a 4-story office building within DesignBuilder 
and EnergyPlus v1.4.0.025 - although the questions that I have are 
mostly related to EnergyPlus.

The single duct variable volume system supplies cold air through 
terminal boxes (w/o reheat). Reheat will occur through radiant 
ceiling panels suspended from the perimeter of each story. However, 
all floors do not have a suspended ceiling, whereas the suspended 
radiant ceiling panels are sandwiched (Aluminum panel, Insulation, 
Air Gap, Slab) and require a different type of floor/ceiling 
construction on the perimeter.
Thus I figured and through DesignBuilder, I may be able to prepare my 
model and include subsurfaces describing the construction of a 
ceiling panel at the location where the ceiling panels are actually 
installed.
Due to the rather odd geometric shape of each story, I can see 
drawbacks in past versions of DesignBuilder&EnergyPlus in modeling 
polygonal subsurfaces with odd dimensions and layout - however for 
now I'll be required to keep EnergyPlus v1.4.0.025.

To simplify the problem in DesignBuilder, I'd draw a simple 
rectangular subsurface corresponding to the actual area (building 
plans&specs) that the perimeter reheat would occupy and proceed with 
editing the input file with reference of an example file. However, by 
doing so I may loose the information of the actual location of the 
radiant ceiling panels (perimeter vs. more internal) within the 
space. 

Now here is the actual question, when modeling an internal heat 
source such as suspended reheat ceiling panels, do EnergyPlus's 
results differ whether they are located on the perimeter of a zone or 
somewhere else on the ceiling?

Any feedback is appreciated,

Sandro



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