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Description
Issue overview
EnergyPlus allows user to specify the "Mean Radiant Temperature Calculation Type" at People object, used for calculating the operative temperature and thermal comfort models. I used "AngleFactor" option and added "ComfortViewFactorAngles" object to list customized angle factors, I have found some unexpected behaviors while running my models:
- I want to request the output variables for radiant temperatures and operative temperatures, there seems to be two level reporting (at zone level vs occupant level) variables:
Zone Operative TemperatureandZone Thermal Comfort Operative Temperature(applies to mean radiant temperature too) and they didn't give the same results, which is quite confusing to me. It seems the zone level reporting always just use the default mean radiant temperature type ("EnclosureAveraged" probably?) since it didn't change when I change the mean radiant temperature type in People. Should they be more consistent to use the People MRT method since as far as I know, it's the only place to explicitly specify it? Is there a way to change the zone level MRT calculation type?
- To report the operative temperature and MRT from Occupant level reporting, the thermal comfort model has to be completely defined, and the
Zone Thermal Comfort Operative TemperatureandZone Thermal Comfort Mean Radiant Temperatureonly show up in RDD for specific thermal comfort models. I didn't try out all the thermal comfort models, but I noticed it didn't report MRT and operative temperature forAdaptiveASH55, but it is reported forFanger.- Why can't we specify the
Mean Radiant Temperature Calculation Typeat People and request MRT and operative temperatures without a detailed thermal comfort model? - What's the reason that only a subset of thermal comfort models have these two outputs available for reporting?
- Why can't we specify the
FYI, I pasted the inputs from IDF that's related along with the full IDF attached on the bottom:
People,
occupants, !- Name
conditioned space 1, !- Zone or ZoneList or Space or SpaceList Name
occupants schedule, !- Number of People Schedule Name
People, !- Number of People Calculation Method
3, !- Number of People
, !- People per Floor Area {person/m2}
, !- Floor Area per Person {m2/person}
0.314170909090909, !- Fraction Radiant
0.563030303030303, !- Sensible Heat Fraction
occupants activity schedule, !- Activity Level Schedule Name
0, !- Carbon Dioxide Generation Rate {m3/s-W}
No, !- Enable ASHRAE 55 Comfort Warnings
AngleFactor, !- Mean Radiant Temperature Calculation Type
AngleFactorList, !- Surface Name/Angle Factor List Name
WORK_EFF_SCH, !- Work Efficiency Schedule Name
ClothingInsulationSchedule, !- Clothing Insulation Calculation Method
, !- Clothing Insulation Calculation Method Schedule Name
CLOTHING_SCH, !- Clothing Insulation Schedule Name
AIR_VELO_SCH, !- Air Velocity Schedule Name
Fanger; !- Thermal Comfort Model 1 Type
ComfortViewFactorAngles,
AngleFactorList, !- name of angle factor list
Floor, !- Surface name 1
1.0, !- Angle factor for surface 1
partition wall mass, !- Surface name 2
0, !- Angle factor for surface 2
Ceiling, !- Surface name 3
0; !- Angle factor for surface 3
Schedule:Compact,
AIR_VELO_SCH, !- Name
Any Number, !- Schedule Type Limits Name
Through: 12/31, !- Field 1
For: AllDays, !- Field 2
Until: 24:00,0.5; !- Field 3
Schedule:Compact,
CLOTHING_SCH, !- Name
Any Number, !- Schedule Type Limits Name
Through: 04/30, !- Field 1
For: AllDays, !- Field 2
Until: 24:00,0.1, !- Field 3
Through: 09/30, !- Field 5
For: AllDays, !- Field 6
Until: 24:00,0.1, !- Field 7
Through: 12/31, !- Field 9
For: AllDays, !- Field 10
Until: 24:00,0.1; !- Field 11
Schedule:Compact,
WORK_EFF_SCH, !- Name
Fraction, !- Schedule Type Limits Name
Through: 12/31, !- Field 1
For: AllDays, !- Field 2
Until: 24:00,0.5; !- Field 3
Operating System (Multiple choices)
Windows
Operating System Version
Windows 11
Version of EnergyPlus
25.1.0
Unmethours link or helpdesk ticket number
N/A
Defect file
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TriageIssue needs to be assessed and labeled, further information on reported might be neededIssue needs to be assessed and labeled, further information on reported might be neededUnconfirmedDefectDefect has not yet confirmed to be an actual issueDefect has not yet confirmed to be an actual issue