[EnergyPlus_Support] Re: Minimum outside air in Controller:Outside Air

["JV Dirkes II" <jvd2pe@xxxxxxx>]

The error message made that much pretty clear.  Apparently "autosize"
is not particularly smart and does not allow the minimum value to
actually BE the minimum value?  It seems that a warning is called for,
but not a fatal error.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Richard Raustad
<RRaustad@...> wrote:
>
> You get the error because the autosized maximum air flow rate is
smaller 
> than the minimum air flow rate. Look at the eio file to determine what 
> the autosized value is for the outside air maximum flow rate. Then 
> compare that number to your fixed value for minimum outside air flow 
> rate. Use either value for both the maximum and minimum outside air
flow 
> rates.
> 
> JV Dirkes II wrote:
> >
> > Dear EPlus Forum,
> >
> > When I set the CONTROLLER:OUTSIDE AIR "minimum outside air flow rate"
> > input to a fixed value and the "maximum outside air flow rate" to
> > "autosize", I receive an error.
> >
> > ** Severe ** For CONTROLLER:OUTSIDE AIR: OACONTROLLER_AH1
> > ** ~~~ ** maximum outside air flow rate (2.83) < minimum
> > outside air flow rate (2.83)
> >
> > In my mind, it seems appropriate to establish a minimum airflow, which
> > in this case is for exhaust fans, and then let the program establish
> > the maximum (which should be the larger of either the specified
> > minimum or economizer operation). Why does this error occur?
> >
> > p.s., It goes away when I "autosize" the minimum value.
> >
> >  
> 
> -- 
> 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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