Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Sorry for updating this after some time. I used EMS to report number of hours when daylight illuminance was between 100 and 2000 lux (i.e. useful daylight). A value of less 100lux means it is too dark and a value of 2000 lux it is too bright.
EnergyManagementSystem:Sensor, BlockIllumminance, !- Name Block1:Zone1, !- Output:Variable or Output:Meter Index Key Name Daylighting Reference Point 1 Illuminance; !- Output:Variable or Output:Meter Name
EnergyManagementSystem:ProgramCallingManager, Illu3, !- Name EndOfZoneTimestepBeforeZoneReporting, !- EnergyPlus Model Calling Point IlluProg3; !- Program Name 1
EnergyManagementSystem:Program, IlluProg3, !- Name IF (BedOcc2 > 0) && ((BlockIllumminance >2000) || (BlockIllumminance <100)), SET ZoneIllu3 = ZoneTimeStep, ELSE, SET ZoneIllu3 = 0, ENDIF;
EnergyManagementSystem:GlobalVariable, ZoneIllu3;
EnergyManagementSystem:OutputVariable, Zone Illuminace Between 100 and 2000 Wile Occupied, !- Name ZoneIllu3, !- EMS Variable Name Summed, !- Type of Data in Variable ZoneTimestep; !- Update Frequency
| | 2 | No.2 Revision |
Sorry for updating this after some time. I used EMS to report number of hours when daylight illuminance was between 100 and 2000 lux (i.e. useful daylight). A value of less than 100lux means it is too dark and a value of 2000 lux means it is too bright. bright (can't remember the publication title but one of the authors was Christoph Reinhart of MIT).
