[EnergyPlus_Support] Re: Variable Fan - fans in series

["Jean marais" <jeannieboef@xxxxxxxxx>]

No, I should bow to the master...I didn't even know FanPerformance:NightVentilation existed. It's like a built in EMS. Very good. Thanks.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Jim Dirkes" <jim@...> wrote:
>
> I bow to the master for such attention to detail.
> 
>  
> 
> (I have not tried to put fans in series.  You might try
> FanPerformance:NightVentilation, something else I have not tried, but it
> appears suited for your purpose.)
> 
>  
> 
> The Building Performance Team
> James V. Dirkes II, P.E., BEMP , LEED AP
> 1631 Acacia Drive NW
> Grand Rapids, MI 49504
> 616 450 8653
> 
>  
> 
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Jean marais
> Sent: Tuesday, August 23, 2011 6:56 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Re: Variable Fan - fans in series
> 
>  
> 
>   
> 
> Because, if the system requirements for load fighting and minimum fresh air
> remain the same, the fan will never drop to 30%. I want to prove that if
> this happens, the relative humidity, temperature, etc. go out of control
> (even at night).
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com> , "Jim Dirkes" <jim@>
> wrote:
> >
> > Dear Jean,
> > 
> > 
> > 
> > Why are you not just using a VAV fan with "Fan power minimum flow
> fraction"
> > set for 30%?
> > 
> > 
> > 
> > The Building Performance Team
> > James V. Dirkes II, P.E., BEMP , LEED AP
> > 1631 Acacia Drive NW
> > Grand Rapids, MI 49504
> > 616 450 8653
> > 
> > 
> > 
> > From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com> 
> > [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com> ] On Behalf Of Jean marais
> > Sent: Tuesday, August 23, 2011 6:19 AM
> > To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com> 
> > Subject: [EnergyPlus_Support] Variable Fan - fans in series
> > 
> > 
> > 
> > 
> > 
> > Hallo All,
> > I need to model that the frequency converters reduce fan volume to 30%
> > during off hours. I'm thinking of building 2 fans in series, where the one
> > fan can only manage 30% of the other fan's volume capacity as it's maximum
> > volume flow rate. Then I can simply switch between them using schedules. 
> > What do you think?
> >
>




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