Hello everyone.
My name is João Tiago Homem, and I am currently doing my master thesis on Dynamic Insulation. In the process, I am trying to simulate elements of insulation (on the walls) that offer a dynamic behavior rather than a static one, by means of:
1 - Changing its conductivity
2 - Adding/Removing a certain layer of insulation in the construction
3 - Changing its thickness
To do so, I am using EnergyManagementSystem (EMS) on EnergyPlus to achieve these changes throughout the simulation period.
Details of the model:
- BESTEST Case 600 (whereas the temperature setpoints are 20ºC and 27ºC)
- Heat Balance Algorithm: CondFD
- Timestep: 1 min
Action on EMS
For instance, I am trying to change the conductivity of the insulation of the walls, from High (0.08) to Low (0.04) whenever a certain condition is true:
Sensors: T_in (Zone Mean Air Temperature), T_out (Site Outdoor Air Drybulb Temperature)
Actuator: Surface, Construction State (on all walls: South, North, East and West)
Program:
IF (T_in > 27 && T_out < T_in) || (T_in < 20 && T_out > T_in)
Set Ins_ConstructSouth = Walls_HighCond Set Ins_ConstructNorth = Walls_HighCond Set Ins_ConstructWest = Walls_HighCond Set Ins_ConstructEast = Walls_HighCondELSE
Set Ins_ConstructSouth = Walls_LowCond Set Ins_ConstructNorth = Walls_LowCond Set Ins_ConstructWest = Walls_LowCond Set Ins_ConstructEast = Walls_LowCond
Errors
Every time I run the simulation, I get this errors:
*** No node connection errors were found.
*** Beginning Simulation
* Severe * InitEMSControlledConstructions: EMS Construction State Actuator not valid.
* ~~~ * Construction named = WALLS_LOWCOND has number of finite difference nodes =5
* ~~~ * While construction named = WALLS_HIGHCOND has number of finite difference nodes =4
* ~~~ * This actuator is not allowed for surface name = SOUTHWALL, and the simulation continues without the override
* Severe * InitEMSControlledConstructions: EMS Construction State Actuator not valid.
* ~~~ * Construction named = WALLS_LOWCOND has number of finite difference nodes =5
* ~~~ * While construction named = WALLS_HIGHCONDhas number of finite difference nodes =4
* ~~~ * This actuator is not allowed for surface name = WESTWALL, and the simulation continues without the override
* Severe * InitEMSControlledConstructions: EMS Construction State Actuator not valid.
* ~~~ * Construction named = WALLS_LOWCOND has number of finite difference nodes =5
* ~~~ * While construction named = WALLS_HIGHCONDhas number of finite difference nodes =4
* ~~~ * This actuator is not allowed for surface name = NORTHWALL, and the simulation continues without the override
* Severe * InitEMSControlledConstructions: EMS Construction State Actuator not valid.
* ~~~ * Construction named = WALLS_LOWCOND has number of finite difference nodes =5
* ~~~ * While construction named = WALLS_HIGHCONDhas number of finite difference nodes =4
* ~~~ * This actuator is not allowed for surface name = EASTWALL, and the simulation continues without the override
If I do the same procedure changing the thickness instead of conductivity, I get the same errors. I already checked all the posts on the community regarding EMS or changeable U-value but they didn't help me finding the solution.
What do you think about this?
