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[EnergyPlus_Support] Re: Problem with EMS and controlling AirLoopHVAC System Availability

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: Problem with EMS and controlling AirLoopHVAC System Availability
From: "rowan.blakers" <rblakers@xxxxxxxxx>
Date: Wed, 17 Mar 2010 22:23:42 -0000
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Thanks to all for the responses.

The error file shows no errors regarding the AirLoopHVAC systems. There is a warning that some of the systems do not have controllers, but this is expected as some loops do not have water coils and are controlled by AvailabilityManager objects.

All Output:EnergyMangementSystem fields are set to Verbose, so it's still a mystery as to why the AirLoopHVAC actuator is not working.

The particular loop that I wish to control contains an OutDoorAir system (set to provide 100% OA) and a Constant Volume Fan feeding to an AirTerminal:SingleDuct:Uncontrolled object. Can anyone see a problem with controlling the fan mass flow rate directly (using the Fan Air Mass Flow Rate control)? Will my OA system still function as expected?

Thanks again.





--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Griffith, Brent" <brent.griffith@...> wrote:
>
> I am not seeing any problems in these inputs.  Check the error file, maybe the AirLoopHVAC is not loading because of other problems.
> 
> As far as the EDD content, check that you have the Output:EnergyManagementSystem object set to verbose for Actuator Availability Dictionary Reporting.
> 
> 
> ________________________________
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of rowan.blakers
> Sent: Tuesday, March 16, 2010 11:58 PM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Problem with EMS and controlling AirLoopHVAC System Availability
> 
> 
> 
> Hello,
> 
> I'm trying to use EMS to control a fan system based on outdoor air temperature and wind speed. The control logic is simple enough, but I keep getting an error when trying to run the simulation.
> "Invalid Actuated Component Type =AIRLOOPHVAC"
> 
> I'm not sure why, but AirLoopHvac is not recognised as a valid actuator component type, and it does not appear in the .EDD file when I run a simulation without that particular control included.
> 
> Can anyone help me understand why I cannot use AirLoopHVAC Availability as an actuator here, and why it is not appearing in the .EDD file either??
> 
> I've included what is hopefully enough of the relevant code. The entire input file is too big to copy here.
> 
> ============================================================
> AirLoopHVAC,
> RoofVent1 Fan System, !- Name
> , !- Controller List Name
> RoofVent Availability List, !- Availability Manager List Name
> 7.14, !- Design Supply Air Flow Rate {m3/s}
> RoofVent1 Air Loop Branches, !- Branch List Name
> , !- Connector List Name
> RoofVent1 Supply Inlet Node, !- Supply Side Inlet Node Name
> RoofVent1 Equipment Outlet Node, !- Demand Side Outlet Node Name
> RoofVent1 Equipment Inlet Node, !- Demand Side Inlet Node Names
> RoofVent1 Supply Fan Outlet; !- Supply Side Outlet Node Names
> 
> AvailabilityManager:NightVentilation,
> RoofVent NightPurge Availability Manager, !- Name
> NightPurge Availability Schedule, !- Applicability Schedule Name
> RoofVent Fan Schedule, !- Fan Schedule Name
> Always 22 Schedule, !- Ventilation Temperature Schedule Name
> 2, !- Ventilation Temperature Difference {deltaC}
> 18, !- Ventilation Temperature Low Limit {C}
> 1, !- Night Venting Flow Fraction
> Corridor; !- Control Zone Name
> 
> AvailabilityManagerAssignmentList,
> RoofVent Availability List, !- Name
> AvailabilityManager:NightVentilation, !- Availability Manager 1 Object Type
> RoofVent NightPurge Availability Manager; !- Availability Manager 1 Name
> 
> EnergyManagementSystem:Sensor,
> CorridorTemp , !- Name
> Corridor Zone Air Node, !- Output:Variable or Output:Meter Index Key Name
> Zone Mean Air Temperature; !- Output:Variable or Output:Meter Name
> 
> EnergyManagementSystem:Sensor,
> OATemp , !- Name
> , !- Output:Variable or Output:Meter Index Key Name
> Outdoor Dry Bulb; !- Output:Variable or Output:Meter Name
> 
> EnergyManagementSystem:Sensor,
> WindSpeed , !- Name
> , !- Output:Variable or Output:Meter Index Key Name
> Wind Speed; !- Output:Variable or Output:Meter Name
> 
> EnergyManagementSystem:Sensor,
> HeatingOn , !- Name
> Corridor Unit01 Convector HW Inlet , !- Output:Variable or Output:Meter Index Key Name
> System Node MassFlowRate;!- Output:Variable or Output:Meter Name
> 
> EnergyManagementSystem:Sensor,
> OccupancySched , !- Name
> GS_School_Teaching_Occup,!- Output:Variable or Output:Meter Index Key Name
> Schedule Value; !- Output:Variable or Output:Meter Name
> 
> EnergyManagementSystem:Sensor,
> TAU1Airflow , !- Name
> TAU1 Equipment Inlet Node, !- Output:Variable or Output:Meter Index Key Name
> System Node MassFlowRate;!- Output:Variable or Output:Meter Name
> 
> EnergyManagementSystem:Sensor,
> TAU2Airflow , !- Name
> TAU2 Equipment Inlet Node, !- Output:Variable or Output:Meter Index Key Name
> System Node MassFlowRate;!- Output:Variable or Output:Meter Name
> 
> EnergyManagementSystem:Actuator,
> CorridorInfiltrationLevel, !- Name
> Corridor Infiltration, !- Actuated Component Unique Name
> Zone Infiltration, !- Actuated Component Type
> Air Exchange Flow Rate; !- Actuated Component Control Type
> 
> EnergyManagementSystem:Actuator,
> RoofVent_FanOverride, !- Name
> RoofVent1 Fan System, !- Actuated Component Unique Name
> AirLoopHVAC, !- Actuated Component Type
> Availability Status; !- Actuated Component Control Type
> 
> EnergyManagementSystem:ProgramCallingManager,
> RoofVent Control System ,!- Name
> AfterPredictorAfterHVACManagers, !- EnergyPlus Model Calling Point
> RoofVent_SystemController ; !- Program Name 1
> 
> EnergyManagementSystem:Program,
> RoofVent_SystemController , !- Name
> set setTwo = 2.0, !- Program Line 1
> set setThree = 3.0, !- Program Line 2
> Set noAction = 0.0, !- A4
> if (OccupancySched == 1) && (HeatingOn >0) && (TAU1Airflow == 0) && (TAU2Airflow == 0), !- A5
> if (OATemp > 18) && (CorridorTemp > OATemp), !- A6
> if (CorridorTemp <=22) && (WindSpeed >10), !- A7
> Set CorridorInfiltrationLevel = setThree, !- A8
> Return, !- A9
> elseif (CorridorTemp >22) && (WindSpeed <= 10), !- A10
> Set RoofVent_FanOverride = setTwo, !- A11
> else, !- A12
> Set RoofVent_FanOverride = noAction, !- A13
> endif, !- A14
> endif, !- A15
> endif; !- A16
>




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References:
- RE: [EnergyPlus_Support] Problem with EMS and controlling AirLoopHVAC System Availability
  - From: Griffith, Brent

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