In EnergyPlus, adiabatic surfaces are modeled as having the same temperature on both sides of the surface, but only inside face of the surface exchanges heat with the zone. This means that heat can be stored in the mass of the wall, but only makes it back into the zone if it is conducted through the inside face. Any heat lost through the outside face is ignored by the simulation. Essentially, you can only utilize half of the mass in the wall.
FYI � this is also what is done in the case of the ThermalMass objects and is why the documentation suggest that you use twice the surface area when modeling thermal mass.
Hope that helps,
Neal Kruis
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Thodwris Xaritidis
Sent: Tuesday, December 14, 2010 10:00 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Re: ABOUT ADIABATIC WALLS AND INTERNAL MASS!!!!!!
Hi louis,
I am not sure about it, but during summer with all the solar heat, I think that the exchange of heat between the north zones
with the offices in the south facade are going to be minimum. It is basically an assumption of mine.
When having a passive building like mine, without hvac, I find it very difficult to have a significant effect.
From: Luis Blanes <lmblanes@xxxxxxxxx>
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Tue, December 14, 2010 4:55:59 PM
Subject: [EnergyPlus_Support] Re: ABOUT ADIABATIC WALLS AND INTERNAL MASS!!!!!!
Dear
First of all, why are you considering that your south zone is not affecting your north zone?
thanks
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "gplp1789" <gplp1789@...> wrote:
>
>
> Hi, everyone,
>
> I want to ask about something. I am having a wall that is adiabatic
> surface, what's the connection with internal mass? I mean, should I
> also put internal mass in this specific wall or not??
>
> I am using adiabatic surface to show that the zones over the adiabatic wall, do not affect my investigating south zones.
>
> Whato do you think??
> Thanx
>
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