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[EnergyPlus_Support] Re: VAV cooling still working when room T is lower than setpoint T

Check your outdoor specification and your outdoor air controller. If you have set the outdoor air controller to deliver a minimum amount of outdoor air to the space at all times, the system will always be delivering air, and therefore always pumping in air at the deck temp. 

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, HJ  wrote:
>
> Thanks for your advice. I didnt set a setpoint for humidity and I think 
> the outdoor air is not humid for certain period but the system is still on.
> 
> I suspect the VAV is turned on because it tried to meet the deck 
> setpoint temperature which is 12.6 C. However, I am not sure how should 
> I change this. There is reheat before supply air entering each zone.
> 
> HJ
> 
> 
> On 2/8/2013 2:30 PM, luke_dorna wrote:
> >
> > It could also be that you are supplying outdoor air and dehumidifying it.
> >
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx 
> > , HJ wrote:
> > >
> > > Hi all,
> > >
> > > I notice the VAV system is still running even if room T is way below
> > > setpoint T (e.g. at night ,Tsetpoint is 26, Troom is 22 something).
> > > However, CAV system does not have this type of problem. Since I am
> > > modeling hybrid ventilation, I would like the VAV system shut down when
> > > Troom meets Tset. Is there a way to achieve that?
> > >
> > > Thanks,
> > >
> > > HJ
> > >
> >
> >
>




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