[EnergyPlus_Support] Re: Fan appears to operate continuously

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

Thank You!  That makes sense.


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Griffith, Brent"
<brent_griffith@...> wrote:
>
> "System Availability Manager:Night Cycle" object works to override the
> fan's schedule.  
> 
>  
> 
> ________________________________
> 
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of JV Dirkes II
> Sent: Monday, March 10, 2008 2:58 PM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Re: Fan appears to operate continuously
> 
>  
> 
> Dear Don,
> 
> The fan is a FAN:SIMPLE:CONSTVOLUME.
> 
> I read somewhere in the documentation that .5 allows cycling at night,
> but I could be wrong on that. The "0" seems to force the fan OFF "no
> matter what". What other objects tell EPlus that it should cycle on
> when a zone requires it to do so, instead of staying off per the
> Compact Schedule?
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com> , Don Shirey <shirey@>
> wrote:
> >
> > Try changing .5 to 0.0.
> > 
> > What type of fan is being used (fan corresponding the the compact 
> > schedule = SchCpct_FanOpern)
> > 
> > JV Dirkes II wrote:
> > > Dear EPlus support team,
> > >
> > > My .csv output file shows a constant value for the "Fan Electric
> > > Power" report variable for every hour of the year. It's supposed to
> > > shut down at night and I expect 0 watts during those periods. Please
> > > help me figure out why the Watts value remains constant.
> > >
> > > The System Availability Manager for the fan is set to "cycle on
> any",
> > > and the schedule for that fan is intended to allow the fan to shut
> > > down at night unless there is a load. (I've shown it below). 
> > > Finally, there is also a compact schedule for temperature setpoints
> > > which lowers the setpoint by ~3C in winter and raises it the same
> > > amount in summer.
> > >
> > > SCHEDULE:COMPACT,
> > > SchCpct_FanOpern,
> > > Any Number,
> > > Through: 31 Dec,
> > > For: Weekdays SummerDesignDay,
> > > Until: 06:00,
> > > .5,
> > > Until: 19:00,
> > > 1,
> > > Until: 24:00,
> > > .5,
> > > For: Saturday,
> > > Until: 08:00,
> > > .5,
> > > Until 13:00,
> > > 1,
> > > Until: 24:00,
> > > .5,
> > > For: Holidays AllOtherDays,
> > > Until: 24:00,
> > > .5;
> > >
> > > Ideas? Thanks
> >
> 
>  
> 
> 
> 
> [Non-text portions of this message have been removed]
>




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