[EnergyPlus_Support] Re: InternalMass and Solar gain

["Jean marais" <jeannieboef@xxxxxxxxx>]

James,

Do you make calculations for internal mass (and how do you go about it) or do you make "walls" using design builder where the partitions and internal walls approximately are?

Jean.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Jim Dirkes" <jim@...> wrote:
>
> Dear Hayes,
> 
>  
> 
> Assuming that you have defined your building geometry and materials
> properly, you have two possibilities, I think:
> 
> .         Check the InternalMass object..  You can add this object
> independently of geometry.  All it does is add mass for the energy balance /
> heat transfer performed by E+.  It does NOT get affected by incident solar
> radiation.
> 
> .         The other possibility is to add walls to your model.  These, of
> course, have mass which is defined by you and also have a location in the
> model.  Thus, they ARE affected by incident solar, as are all floors and
> ceilings. (but they slow down calculations L)
> 
> .          
> 
>  
> 
> The Building Performance Team
> James V. Dirkes II, P.E., BEMP , LEED AP
> 1631 Acacia Drive NW
> Grand Rapids, MI 49504
> 616 450 8653
> 
>  
> 
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of hzirnhelt
> Sent: Thursday, June 30, 2011 11:43 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] InternalMass and Solar gain
> 
>  
> 
>   
> 
> Hi, I'm working on a project modelling the effect of passive solar. I
> haven't been able to find much info on how internal mass is modelled in
> EnergyPlus. Does anyone know if it receives radiation from outside of the
> building?
> 
> Thanks,
> Hayes
>




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