EMS actuator override of mass flow rate and temperature provide strange behaviour.

asked 2022-03-03 07:42:57 -0500

lobo's avatar


I'm developing new Reinforcement Learning Control Strategies and I'm using E+ as a test bed for the algorithms. I managed to use only

    t_in_air,                !- Name
    VAV SYS 1 OUTLET NODE,   !- Actuated Component Unique Name
    System Node Setpoint,    !- Actuated Component Type
    Temperature Setpoint;    !- Actuated Component Control Type

as an actuator to optimize the Energy Consumption in the building by varying the temperature. Since I will like to give more control actions I have started to use the mass flow rate and I have created the following actuator:

    mdot_fan,                !- Name
    SUPPLY FAN 1,            !- Actuated Component Unique Name
    Fan,                     !- Actuated Component Type
    Fan Air mass Flow Rate;  !- Actuated Component Control Type

Using the ExternalInterface:Variable, EnergyManagementSystem:ProgramCallingManager and EnergyManagementSystem:ProgramI pass and set my control actions:

    act_calls1,              !- Name
    InsideHVACSystemIterationLoop,  !- EnergyPlus Model Calling Point
    Act;                     !- Program Name 1

   Act,                     !- Name
   SET t_in_air = tair,     !- Program Line 1
   SET mdot_fan = mdot;     !- Program Line 2

    mdot,                    !- Name
    1;                       !- Initial Value

    tair,                    !- Name
    1;                       !- Initial Value

I have tried with both AirTerminal:SingleDuct:ConstantVolume:NoReheat and AirTerminal:SingleDuct:VAV:Reheat.

With AirTerminal:SingleDuct:ConstantVolume:NoReheat the RL algorithm discovers a strange behaviour of E+ that makes the temperature to follow the E+ base line in blue but the HVAC consumption is almost 0

image description

With AirTerminal:SingleDuct:VAV:Reheat the VAV SYS 1 OUTLET NODE it does not flow the controls that I pass to E+ (in green what E+ does in red what I wanted to do).

image description

At the links you find the zips with the IDF, the control_actions and the E+ output for both cases.



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Have you looked at the .edd file?

bonnema's avatar bonnema  ( 2022-03-03 10:41:54 -0500 )edit