RE: [EnergyPlus_Support] Re: Can parametrics objects be used within EMS?

Dear Marko,

It looks to me Jean has provided a viable solution. Could you let us know if it worked? On the other hand, I think your original problem may be from the way the parameter was referenced in the EMS code. To use the parameter, you need to insert “=$SuppT”, rather than just “$SuppT”. You may open one of the idf files generated by the parametric pre-processor, and search for “$SuppT”. If you find any, that would mean they haven’t been replaced with the actual value.

If you only need to inject values into your model, rather than using the formula or logic functions of the parametric pre-processor, jEPlus may be easier tool for your job. Another potential advantage of jE+ is that you can in fact define the whole EMS program as a parameter, to test different control logics.

Cheers,

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Jean marais
Sent: 10 July 2013 11:21
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: Can parametrics objects be used within EMS?

Do you define how the parametric files are to be called? e.g.

Parametric:FileNameSuffix,
Names,
P1,
P2;

I would think the parametric preprocessor runs and inserts the values into each sepperate idf. Then in the simulation the EMS code is envoked as normal, i.e. there you won't see any $, but only the value that was written in.

I would however, do the substitution via a variable where myvalue,
is the first on the line...for example:

Schedule:Compact,
HW LOOPSCHEDULE, !- Name
Temperature, !- Schedule Type Limits Name
Through: 12/31, !- Field 1
For: Weekdays WinterDesignDay, !- Field 2
Until: 24:00, !- Field 3
=$SuppT, !- Field 4
For: AllOtherDays, !- Field 5
Until: 24:00, !- Field 6
45; !- Field 7

EnergyManagementSystem:GlobalVariable,
SuppTvalue; !- Erl Variable 2 Name

EnergyManagementSystem:Sensor,
HW_LOOPSCHEDULE_Sensor,
HW LOOPSCHEDULE,
Schedule Value;

EnergyManagementSystem:Program,
HWSupplyTemperatureControl, !- Name

SET SuppTvalue = HW LOOPSCHEDULE Sensor,

IF (OutsideAirSensor < (0 - 12.0)), !- Program Line 1
SET ControlValve==SuppTvalue,!- Program Line 2
ELSEIF (OutsideAirSensor > 12.0), !- A4
SET ControlValve=45.0, !- A5
ELSE, !- A6
SET ControlValve=((1/12)*(22.5-(0.5)*SuppTvalue))*OutsideAirSensor+((0.5)*(SuppTvalue+45), !- A7
ENDIF; !- A8

*********************************
or you could try direct from the sensor in as

IF (OutsideAirSensor < (0 - 12.0)), !- Program Line 1
SET ControlValve==HW_LOOPSCHEDULE_Sensor,!- Program Line 2
ELSEIF (OutsideAirSensor > 12.0), !- A4
SET ControlValve=45.0, !- A5
ELSE, !- A6
SET ControlValve=((1/12)*(22.5-(0.5)*HW_LOOPSCHEDULE_Sensor))*OutsideAirSensor+((0.5)*(HW_LOOPSCHEDULE_Sensor+45), !- A7
ENDIF; !- A8

Jean

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "marko.ignjatovic1980" <marko.ignjatovic1980@...> wrote:
>
> Hi all,
>
> I am trying to do sensitivity analysis of my model. I generated sample for input vector(s), and figured that the easiest way is to use Parametrics within E+. In my model I modeled simple boiler control using EMS. It worked fine when I had only design values. Now, i tried inserting objects from parametric runs, but E+ collapses. In addition I am giving part of IDF file.
>
> Sincerely
>
> Marko
>
> Schedule value varied by EMS
>
> Schedule:Compact,
> HW LOOPSCHEDULE, !- Name
> Temperature, !- Schedule Type Limits Name
> Through: 12/31, !- Field 1
> For: Weekdays WinterDesignDay, !- Field 2
> Until: 24:00, !- Field 3
> =$SuppT, !- Field 4
> For: AllOtherDays, !- Field 5
> Until: 24:00, !- Field 6
> 45; !- Field 7
>
> EMS Sensor
>
> EnergyManagementSystem:Sensor,
> OutsideAirSensor, !- Name
> Environment, !- Output:Variable or Output:Meter Index Key Name
> Outdoor Dry Bulb; !- Output:Variable or Output:Meter Name
>
>
> EMS Actuator
>
> EnergyManagementSystem:Actuator,
> ControlValve, !- Name
> HW LOOPSCHEDULE, !- Actuated Component Unique Name
> Schedule:Compact, !- Actuated Component Type
> Schedule Value; !- Actuated Component Control Type
>
> EMS Program Calling mng
>
> EnergyManagementSystem:ProgramCallingManager,
> HWSupplyTemp Control, !- Name
> BeginTimestepBeforePredictor, !- EnergyPlus Model Calling Point
> HWSupplyTemperatureControl; !- Program Name 1
>
> EMS Program
>
> EnergyManagementSystem:Program,
> HWSupplyTemperatureControl, !- Name
> IF (OutsideAirSensor < (0 - 12.0)), !- Program Line 1
> SET ControlValve==$SuppT,!- Program Line 2
> ELSEIF (OutsideAirSensor > 12.0), !- A4
> SET ControlValve=45.0, !- A5
> ELSE, !- A6
> SET ControlValve=((1/12)*(22.5-(0.5)*$SuppT))*OutsideAirSensor+((0.5)*($SuppT+45), !- A7
> ENDIF; !- A8
>
> Parametric
>
> Parametric:SetValueForRun,
> $SuppT, !- Name
> 64.3905; !- Value for run 1
>

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