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[EnergyPlus_Support] Re: Mechanical night ventilation

Hi Juliana,

Unfortunately I don't have enough experience with explicit airflow networks to offer advice on this.  I think the error messages you're getting are relative to the fact that you can't really mix detailed airflow and simplified components.  So if you want some detailed objects, you'll likely have to go all the way with that strategy.  Good luck.  

Liam

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "juobatista" <juobatista@...> wrote:
>
> Hi Liam, thanks for your response!
> 
> I tried this solution, but it wasn't successful. It seems these objects "zone ventilation" and "zone infiltration" cannot be simulated among air flow network (see below the err reports): 
> 
> 1) First simulation:
> ** Warning ** GetAirflowNetworkInput: AirflowNetwork:SimulationControl object, Specified AirflowNetwork Control = "MultizoneWithoutDistribution" and ZoneVentilation objects are present.
>    **   ~~~   ** ..ZoneVentilation objects will not be simulated.
> 
> 2) Second simulation:
> ** Warning ** GetAirflowNetworkInput: AirflowNetwork:SimulationControl object, Specified AirflowNetwork Control = "MultizoneWithDistribution" and ZoneVentilation objects are present.
>    **   ~~~   ** ..ZoneVentilation objects will not be simulated.
> 
> That's the question: I need to simulate with air flow network, to obtain results related to natural ventilation, considering windows opening and variable wind direction. So, there is some way to simulate a fan operating "inside" the air flow network option?
> 
> Thanks in advance,
> 
> Juliana
> 
> 
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Liam O'Brien" <liambrn@> wrote:
> >
> > A simpler solution to an airflow network, would be to use ZoneVentilation.  You can have the ventilation rate dependent on the indoor and outdoor temperatures.  To restrict ventilation to 21:00 to 7:00 using a compact schedule, but I believe you'll have to allow it upto: 7, not upto: 21, and upto: 24.  You can also predict fan energy using the ZoneVentilition object.
> > 
> > Liam O'Brien
> > 
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "juobatista" <juobatista@> wrote:
> > >
> > > Hi!
> > > 
> > > I simulated a model of a house with natural ventilation during day hours, using airflow network in Energy Plus. But I need to combine natural ventilation with mechanical night ventilation (9 P.M to 7 A.M). The system consists in a simple intake fan, positioned in a hole on the wall, with constant flow, operated by electricity. 
> > > 
> > > How can I do it? I tried zone infiltration (zone air flow) + a apropriated schedule but it wasn't successful. 
> > > 
> > > Thanks!
> > > 
> > > Juliana
> > >
> >
>




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