Re: [EnergyPlus_Support] BuildingSurface:Detailed and Zone/Surface

[Linda Lawrie <linda@xxxxxxxxxxxxxx>]

You only need to list one -- EnergyPlus will make the other
and reverse the construction layers of the "added"
wall.

If you do not have a wall between the zones, consider the walls made of
an Material:Infraredtransparent material or a wall of very little thermal
mass or don't model a wall there (but you won't automatically have air
transfer if you call them different zones -- you will need to add a
Mixing or Cross Mixing item to have air transfer.

At 06:32 PM 11/25/2009, careym.cosmaj wrote:
> Hi,
>
> Working on a multizone model, for arguments sake two adjacent zones A
> & B, seperated by a wall, gib/framing/gib.
>
> If I describe the interface between each as;
>
> BuildingSurface:Detailed,
>  A_W1,            
> !- Name
>  Wall,            
> !- Surface Type
>  Gib_Framing_Gib,  !- Construction Name
>  A,               
> !- Zone Name
>  Zone,            
> !- Outside Boundary Condition
>  B,               
> !- Outside Boundary Condition Object
>
> BuildingSurface:Detailed,
>  B_W1,            
> !- Name
>  Wall,            
> !- Surface Type
>  Gib_Framing_Gib,  !- Construction Name
>  B,               
> !- Zone Name
>  Zone,            
> !- Outside Boundary Condition
>  A,               
> !- Outside Boundary Condition Object
>
> The documentation (ioref 10/02/09 pp 215) suggests;
>
> "...EnergyPlus will automatically create the required surface in the
> adjacent zone when this is entered for the surface...."
>
> So I will end up with double the effective area for heat transfer between
> zones as I have listed for eplus twice? (assuming the area of the surface
> is the same in each case).
>
>
> Conversely in the situation where the zones do not have an intermediate
> wall, i.e a large open plan area served by multiple fan coil
> units.
>
> ioref suggests I should be using Surface but I still have to provide a
> construction type, does eplus ignore the construction type and assume
> zero thermal resistance?
>
> Clarification would be appreciated.
>
> Regards,
>
> Mark Carey
>
>
>
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