[EnergyPlus_Support] Re: schedule on the fresh air rate of a CAV, possible ?

["FrancescoP" <direzionecontraria@xxxxxxxx>]

I did in the following way:

Controller:OutdoorAir,
    1primo_ufficionord Unitary HP AirToAir/1 Outdoor Air Controller,  !- Name
    1primo_ufficionord Unitary HP AirToAir/1 Relief Air Outlet,  !- Relief Air Outlet Node Name
    1primo_ufficionord Unitary HP AirToAir/1 Extract Fan Air Outlet Node,  !- Return Air Node Name
    1primo_ufficionord Unitary HP AirToAir/1 Mixed Air Outlet,  !- Mixed Air Node Name
    1primo_ufficionord Unitary HP AirToAir/1 Outdoor Air Inlet,  !- Actuator Node Name
    0.036,                   !- Minimum Outdoor Air Flow Rate {m3/s}
    0.036,                   !- Maximum Outdoor Air Flow Rate {m3/s}
    NoEconomizer,            !- Economizer Control Type
    ModulateFlow,            !- Economizer Control Action Type
    ,                        !- Economizer Maximum Limit Dry-Bulb Temperature {C}
    ,                        !- Economizer Maximum Limit Enthalpy {J/kg}
    ,                        !- Economizer Maximum Limit Dewpoint Temperature {C}
    ,                        !- Electronic Enthalpy Limit Curve Name
    ,                        !- Economizer Minimum Limit Dry-Bulb Temperature {C}
    NoLockout,               !- Lockout Type
    FixedMinimum,            !- Minimum Limit Type
    occupazione,             !- Minimum Outdoor Air Schedule Name
    ,                        !- Minimum Fraction of Outdoor Air Schedule Name
    ,                        !- Maximum Fraction of Outdoor Air Schedule Name
    ,                        !- Mechanical Ventilation Controller Name
    ,                        !- Time of Day Economizer Control Schedule Name
    No,                      !- High Humidity Control
    1primo:Ufficionord,      !- Humidistat Control Zone Name
    1,                       !- High Humidity Outdoor Air Flow Ratio
    No,                      !- Control High Indoor Humidity Based on Outdoor Humidity Ratio
    BypassWhenWithinEconomizerLimits;  !- Heat Recovery Bypass Control Type


Schedule:Compact,
    occupazione,             !- Name
    Fraction,                !- Schedule Type Limits Name
    Through: 12/31,          !- Field 1
    For: Weekdays SummerDesignDay WinterDesignDay,  !- Field 2
    Until: 08:00, 0,         !- Field 4
    Until: 18:00, 1,         !- Field 6
    Until: 24:00, 0,         !- Field 8
    For: Weekends,           !- Field 9
    Until: 24:00, 0,         !- Field 11
    For: AllOtherDays,       !- Field 12
    Until: 24:00, 0;         !- Field 14

As output:variable you can check "AirLoopHVAC Actual Outdoor Air Fraction"





--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Geert Bellens"  wrote:
>
> I want to put a schedule on the fresh air rate of a 100% fresh air CAV system. The zones have all different air rates depending on the time of the day varying between 20 and 100%. I have the impression that this is not possible...?
> 
> I I use a VAV, the air rates are controlled by the indoor temperature, which is not what I want.
> 
> Geert
>



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