[EnergyPlus_Support] Re: VAV:NoReheat and indoor air quality

["alexandrevarela2000" <amv@xxxxxxxxxxxxxxxxxxxxx>]

Dear Richard Raustad,

Thank you very much for your reply. Yes, these objects allow for
outside air based on a ventilation rate per occupant or ventilation
rate per floor area.

The thing is that the VAV damper is controlled based on zone load or
the minimum outside air fraction defined in the VAV object.

EngineeringReference.pdf, pg. 432 of the pdf, indicates total air flow
to the zone to be function of maximum air flow, minimum air flow
fraction and zone load. This seems to ignore OA flow rates determined
by Controller:Outside Air or Controller:Outside Air, and only take the
VAV:NoReheat inputs into account.

I'm looking for a way for solving this, all help is welcome.

Thanks again. Best regards,
Alexandre



--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Richard Raustad
<RRaustad@...> wrote:
>
> The VENTILATION:MECHANICAL object can provide outside air based on a 
> ventilation rate per occupant or ventilation rate per floor area. See 
> documentation for Controller:Outside Air and Demand Controlled 
> Ventilation in the Engineering Reference. You will find the input 
> requirements for Controller:Outside Air and Ventilation:Mechanical in 
> the Input Output Reference. You can also review the example file named 
> HeatPumpSimpleDCV.idf.
> 
> alexandrevarela2000 wrote:
> >
> > Dear all,
> >
> > I need to use a VAV system and to ensure a variable minimum outside
> > air flow rate. The outside air flow rate is to be varied according to
> > the number of people in the zone.
> >
> > The VAV model only allows to have a fixed outside air flow fraction.
> > Is it possible to have this minimum outside air fraction changing over
> > time, with the number of people in the zone?
> >
> > Thanks. Best regards,
> > Alexandre
> >
> >  
> 
> -- 
> 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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