[EnergyPlus_Support] Re: Heat balance model: Zone air mass

["anarui.oliveira" <anarui.oliveira@xxxxxxxxx>]

So, the actual air mass considered for each zone is constant, based 
on zone volume and initial density conditions?
Ana.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Richard Raustad 
<RRaustad@...> wrote:
>
> Equation 2 is the heat balance equation without the impact of HVAC 
> equipment. So this equation is not impacted by airflow through 
> inlet/outlet nodes in the zone. The actual air mass flow rates used 
are 
> shown in the equation as Mi (interzone mixing caused by mixing and 
> cross-mixing objects) and Minf (infiltration). Each of these mass 
flow 
> rate terms represent the mass flow rate of air "entering" each zone 
and 
> are specified by the user. The impact of the zone inlet node mass 
flow 
> rate on the heat balance is shown in Equation 5 as Msys. This is 
the 
> actual mass flow rate "entering" the zone through the zone inlet 
node 
> and is a result of HVAC system operation.
> 
> anarui.oliveira wrote:
> >
> > Hi.
> >
> > A question about E+ heat balance model:
> > - What is the actual air mass (I believe it is hidden in "Cz" in 
Eq.
> > (2)?) E+ considers for each zone? Is it constant? Is it affected 
by any
> > of the airflows that use inlet/outlet nodes or zones nodes?
> >
> > Regards,
> > Ana.
> >
> >  
> 
> -- 
> Richard A. Raustad
> Senior Research Engineer
> Florida Solar Energy Center
> University of Central Florida
> 1679 Clearlake Road
> Cocoa, FL  32922-5703
> Phone:   (321) 638-1454
> Fax:     (321) 638-1439 or 1010
> Visit our web site at: http://www.fsec.ucf.edu
> 
> UCF - From Promise to Prominence: Celebrating 40 Years
>



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