Re: [EnergyPlus_Support] How Thermal Mass Works in E+?

["Michael J. Witte" <mjwitte@xxxxxxxx>]

If you use an HVAC system to force the nighttime ventilation, you can 
use the CeilingDiffuser option for INSIDE CONVECTION ALGORITHM to 
alter the convection coefficients based on airflow in the space.

If you use other means to introduce the ventilation air, you are 
correct that there would be no automatic adjustment of convection 
coefficients.  If this is important, you could predetermine the 
appropriate values for convection coefficients and assign them by 
schedule using the ConvectionCoefficients object.

Mike




On 16 Jun 2003, at 9:34, Hannah Yan wrote:

> But as E+ does not model air velocity variance in the
> natural ventilation room, I am wondering how accurate
> it would be for night ventilation and/or daytime.
> 
> Hannah
> 
> 
> --- "Michael J. Witte" <mjwitte@xxxxxxxx> wrote:
> > Yes, EnergyPlus can model this.
> > 
> > Mike
> > 
> > 
> > On 11 Jun 2003, at 18:10, Hannah Yan wrote:
> > 
> > > I want to model a natural ventilation building,
> > and
> > > try to see how much thermal mass is optimum for
> > that
> > > climate. I would like to see the night ventilation
> > > effect, and how the higher or lower surface
> > > temperature would affect thermal comfort during
> > the
> > > day. 
> > > 
> > > Is E+ capable of doing this? 
> > > 
> > > Thanks,
> > > 
> > > Hannah
> > > 



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EnergyPlus Testing and Support      
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