Re: [EnergyPlus_Support] Re: Fan appears to operate continuously

[Fred Buhl <wfbuhl@xxxxxxx>]

That's right. The fan availability schedule (possibly a bad name) is an
on/off schedule: values > 0.0 mean the fan is on; 0.0 means the fan is off.
The SYSTEM AVAILABILITY MANAGER:NIGHT CYCLE overrides
this schedule. See example file 5ZoneDDXyxOnAny.idf.

Fred

Griffith, Brent 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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>
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>
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>
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>  
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>
>
>
>   


[Non-text portions of this message have been removed]



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