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Re: [EnergyPlus_Support] interior walls in a one zone model



Niko, 
Typically adiabatic walls are not used to account for thermal inertia, as they are are adiabatic their only function to end a zone at the point where it would meet another zone. For instance one might use an adiabatic surface if they wanted to do a shoebox model of a single zone separated from a larger building. 

The object that is designed to account for "thermal inertia" is called: "Internal Mass" and can be found in the "Thermal Zones and surfaces" section of idf editor.
Here is a what the inputs can look like:

Name Phase Change Internal Mass
Construction Name BioPCM_LightWeightWall
Zone Name Zone1
Surface Area 100





Jeremiah D. Crossett  | Senior Analyst  |  Phase Change Energy Solutions
120 E. Pritchard St.  | Asheboro, NC 27203  | Mobile 503-688-8951
  





On Fri, Jan 11, 2013 at 6:17 AM, niko_heeren <nheeren@xxxxxxx> wrote:
 

Dear community

I am a little confused about internal walls. For a 1 zone model of a single family building I want to introduce the internal walls in order to correctly account for their thermal inertia.

What is the correct way to input an interior wall within a zone?
Can / should I use the object Wall:Adiabatic?

The interior wall consists of three layers: plaster/insulation/plaster

The I/O reference of energyplus confuses me a little: On page 176 it says to the object Walls:Detailed:
"Only the inside face of the surface will exchange heat with the zone (i.e. two adiabatic surfaces are required to model internal partitions where both sides of the surface are exchanging heat with the zone)."

On page 156 on Walls:Adiabatic it says:
"Regardless of location in the building, the "full" construction (all layers) is used."

Any help is very much appreciated.

Kind regards
Niko Heeren




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