feilongdang's profile - activity

I am trying to set up some custom output variables, so that I can use the custom data to be analysis directly. But I checked the custom output variables by handling the original output variables, I found some problems, which are:

A.When I use the original output variables to calculate 'Temperature Efficiency' and 'AC Consumption' with the same formulas in EMS program, the results does not match with the EMS custom output results, even through I change the reporting frequency from hourly to timestep.

B. The AC system operates from 8:00 AM to 5:00 PM. For calculating the AC Consumption, the result from original output variables is smaller than the EMS result, but usually after a shorter period such as from 8:30 AM, the former result equals with the EMS result.

C. I checked the example files of EMSCustomOutputVariable.idf, and set a simple EMS program to let the T1 plus T2. I found that when the output variable style is 'Zone mean air temperature', the result from original output variables equals the EMS result. But when I change the output variable style to 'Zone air temperature', the two results differ a lot.

The blow is the idf scripts:

!-   ===========  ALL OBJECTS IN CLASS: ENERGYMANAGEMENTSYSTEM:SENSOR ===========

EnergyManagementSystem:Sensor,
    Tout,                    !- Name
    1W,                      !- Output:Variable or Output:Meter Index Key Name
    Zone Air Temperature ;   !- Output:Variable or Output:Meter Name

EnergyManagementSystem:Sensor,
    Tin,                     !- Name
    1W,                      !- Output:Variable or Output:Meter Index Key Name
    Zone Ventilation Air Inlet Temperature ;  !- Output:Variable or Output:Meter Name

EnergyManagementSystem:Sensor,
    Ts1,                     !- Name
    1W_N_Floor,              !- Output:Variable or Output:Meter Index Key Name
    Surface Inside Face Temperature ;  !- Output:Variable or Output:Meter Name

EnergyManagementSystem:Sensor,
    Ts2,                     !- Name
    1W_N_Ceiling,            !- Output:Variable or Output:Meter Index Key Name
    Surface Inside Face Temperature;  !- Output:Variable or Output:Meter Name

EnergyManagementSystem:Sensor,
    Ts3,                     !- Name
    1W_S,                    !- Output:Variable or Output:Meter Index Key Name
    Surface Inside Face Temperature;  !- Output:Variable or Output:Meter Name

EnergyManagementSystem:Sensor,
    Ts4,                     !- Name
    1W_E_S_Wall,             !- Output:Variable or Output:Meter Index Key Name
    Surface Inside Face Temperature;  !- Output:Variable or Output:Meter Name

EnergyManagementSystem:Sensor,
    Ts5,                     !- Name
    1W_N,                    !- Output:Variable or Output:Meter Index Key Name
    Surface Inside Face Temperature;  !- Output:Variable or Output:Meter Name

EnergyManagementSystem:Sensor,
    Ts6,                     !- Name
    1W_W,                    !- Output:Variable or Output:Meter Index Key Name
    Surface Inside Face Temperature;  !- Output:Variable or Output:Meter Name

EnergyManagementSystem:Sensor,
    Ts7,                     !- Name
    1W_C_Ceiling,            !- Output:Variable or Output:Meter Index Key Name
    Surface Inside Face Temperature;  !- Output:Variable or Output:Meter Name

EnergyManagementSystem:Sensor,
    Ts8,                     !- Name
    1W_S_Ceiling,            !- Output:Variable or Output:Meter Index Key Name
    Surface Inside Face Temperature;  !- Output:Variable or Output:Meter Name

EnergyManagementSystem:Sensor,
    Ts9,                     !- Name
    1W_S_Floor,              !- Output:Variable or Output:Meter Index Key Name
    Surface Inside Face Temperature;  !- Output:Variable or Output:Meter Name

EnergyManagementSystem:Sensor,
    Ts10,                    !- Name
    1W_C_Floor,              !- Output:Variable or Output:Meter Index Key Name
    Surface Inside Face Temperature;  !- Output:Variable or Output:Meter Name

EnergyManagementSystem:Sensor,
    Ts11,                    !- Name
    1W_E_N_Wall,             !- Output:Variable or Output:Meter Index Key Name
    Surface Inside ...