Mariam's profile - activity

Thanks to @JasonGlazer and @Denis Bourgeois, EMS output is simply lagging behind every timestep that can be due to repor

I am using EMS to compute an intermediate value based on the available sensors. To check that the correct values are used in the EMS calculations, I created customized EMS outputs for those sensors and compared them with their values produced in the ESO file. For example, one of the sensors is the System Node Wetbulb Temperature of the Air Loop Demand Side Outlet as follows:

• Actual sensor reading:

  Output:Variable,
          Air Loop Demand Side Outlet,  !- Key Value
          System Node Wetbulb Temperature,  !- Variable Name
          timestep;                  !- Reporting Frequency
  

• EMS sensor reading definition and it custom output:

  Output:Variable,
          *,                       !- Key Value
          AirLoopWetbulb_Temperature_EMS,                !- Variable Name
          timestep;                  !- Reporting Frequency
  
      EnergyManagementSystem:Sensor,
          AirLoopWetbulb_Temperature,                !- Name
          Air Loop Demand Side Outlet,  !- Output:Variable or Output:Meter Index Key Name
          System Node Wetbulb Temperature;  !- Output:Variable or Output:Meter Name
  
      EnergyManagementSystem:OutputVariable,
          AirLoopWetbulb_Temperature_EMS,                !- Name
          AirLoopWetbulb_Temperature,                !- EMS Variable Name
          Summed,                  !- Type of Data in Variable
          !Averaged,                  !- Type of Data in Variable
          ZoneTimeStep ;           !- Update Frequency
  

Is there a way to eliminate or minimize this error? I tried different EMS Program Calling options as follows:

    EnergyManagementSystem:ProgramCallingManager,
        For EMS Run , !- Name
        BeginTimestepBeforePredictor,  !- EnergyPlus Model Calling Point
        !AfterPredictorBeforeHVACManagers
        !EndOfZoneTimestepAfterZoneReporting
        !EndOfZoneTimestepBeforeZoneReporting
        EMSProgram1;        !- Program Name 1

Thank you.

Thanks to @JasonGlazer and @Denis Bourgeois, EMS output is simply lagging behind every timestep that can be due to repor

Thank you @JasonGlazer and @Denis Bourgeois for your reply. Indeed, I have missed this observation because my question

Custom Control of AHU using EMS in Energy Plus I want to design a customized control logic for a CAV AHU in E+ that cont

Custom Control of AHU using EMS in Energy Plus I want to design a customized control logic for a CAV AHU in E+ that cont

Different values of "Output:Variable" and "EnergyManagementSystem:OutputVariable" for the same Sensor in EnergyPlus I am

Custom Control of AHU using EMS in Energy Plus I want to design a customized control logic for a CAV AHU in E+ that cont

Custom Control of AHU using EMS in Energy Plus I want to design a customized control logic for a CAV AHU in E+ that cont

Custom Control of AHU using EMS in Energy Plus I want to design a customized control logic for a CAV AHU in E+ that cont

Thank you for your reply and help. This is very useful!

I am attempting to model an AirFlowNetwork in E+ as presented in my previous question: Interzone airflow between adjacent zones with open walls and dedicated AHUs, and I have some doubts I would like your help to clear out, which are:

• What is the difference between MultizoneWithDistribution and MultizoneWithoutDistribution, which are two types of the AirflowNetwork Control that is under Class AirflowNetwork:SimulationControl? For the large space served by multiple AHUs (and I have divided this space into smaller ones with open walls (i.e., open doors) and I want to simulate the airflow network, which option should I use?

• Can I use AirflowNetwork:MultiZone:SurfaceCrack instead of AirflowNetwork:MultiZone:Component:SimpleOpening/DetailedOpening for my vertical openings, namely the artificial doors and windows I created in the process of dividing this large space I am working on? That is, those doors and windows are not meant to ever close or be operated.

• Any advices on setting AirflowNetwork:MultiZone:ReferenceCrackConditions?

Thank you.

Design and Settings of AirFlowNetwork model in E+ for large space served by multiple AHUs I am attempting to model an Ai

Interzone airflow between adjacent zones with open walls and dedicated AHUs I am simulating a large theater with multipl

Thank you Jason for your reply. I have already conducted a CFD analysis to identify air paths. I do not have enough info

Interzone airflow between adjacent zones with open walls and dedicated AHUs I am simulating a large theater with multipl

Interzone airflow between adjacent zones with open walls and dedicated AHUs I am simulating a large theater with multipl