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Re: [EnergyPlus_Support] Humidity Control with HVAC Template and Infiltration
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1) Yes, you need a humidistat.
2) This infiltration object should be constant throughout the year:
ZoneInfiltration:DesignFlowRate,
Back_Space_Infiltration, !- Name
Back_Space, !- Zone Name
INFIL_SCH, !- Schedule Name
Flow/Zone, !- Design Volume Flow Rate Calculation Method
0.2382, !- Design Flow Rate {m3/s}
, !- Flow per Zone Area {m3/s/m2}
, !- Flow per Exterior Surface Area {m3/s/m2}
, !- Air Changes Per Hour {ACH}
1.0000, !- Constant Term Coefficient
0.0000, !- Temperature Term Coefficient
0.0000, !- Velocity Term Coefficient
0.0000; !- Velocity Squared Term Coefficient
Schedule:Compact,
INFIL_SCH, !- Name
fraction, !- Schedule Type Limits Name
Through: 12/31, !- Field 1
For: Alldays, !- Field 2
Until: 24:00, !- Field 3
1.0; !- Field 4
Abdul Murad Zainal Abidin wrote:
>
> Hello,
>
>
> I am having a problem with controlling relative humidity for a zone
> using HVAC Template:System:Unitary. I have put a schedule specifically
> for relative humidity, where I want the RH to be consistent at 55%.
> Even though I have defined the dehumidification setpoint at 55%, I
> still find that the RH is fluctuating. It seems that there is no
> association between the schedule and the input in the HVAC Template.
> Do I need to specify inside the Zone:Humidistat as well?
>
> Regarding infiltration, I have also defined the schedule for
> infiltration to be available throughout a year and for 24 hours.
> However, after running the simulation and looking at the eso files,
> there are certain period in which infiltration is zero (it seems that
> it is scheduled). How is it possible?
>
> Thank you for reading.
>
> Murad
>
>
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