Hello everyone,
I am trying to model an AirLoop with DCV in openstudio. I've seen it is only reachable via EnergyPlus (v23.20 used) so that is what I am doing right now. I have set the following configurations on the IDF:
ZoneControl:ContaminantController,
DCV_900ppm, !- Name
Thermal Zone: L01_Multipurpose Room 1, !- Zone Name
Always On, !- Carbon Dioxide Control Availability Schedule Name
CO2_900ppm_setpoint; !- Carbon Dioxide Setpoint Schedule Name
Controller:OutdoorAir,
Controller Outdoor Air 1,!- Name
Node 93, !- Relief Air Outlet Node Name
Node 32, !- Return Air Node Name
Node 37, !- Mixed Air Node Name
Outboard OA Node, !- Actuator Node Name
0, !- Minimum Outdoor Air Flow Rate {m3/s}
100000, !- Maximum Outdoor Air Flow Rate {m3/s}
NoEconomizer, !- Economizer Control Type
ModulateFlow, !- Economizer Control Action Type
28, !- Economizer Maximum Limit Dry-Bulb Temperature {C}
64000, !- Economizer Maximum Limit Enthalpy {J/kg}
, !- Economizer Maximum Limit Dewpoint Temperature {C}
, !- Electronic Enthalpy Limit Curve Name
-100, !- Economizer Minimum Limit Dry-Bulb Temperature {C}
NoLockout, !- Lockout Type
FixedMinimum, !- Minimum Limit Type
, !- Minimum Outdoor Air Schedule Name
, !- Minimum Fraction of Outdoor Air Schedule Name
, !- Maximum Fraction of Outdoor Air Schedule Name
Controller Mechanical Ventilation 1, !- Mechanical Ventilation Controller Name
, !- Time of Day Economizer Control Schedule Name
No, !- High Humidity Control
, !- Humidistat Control Zone Name
, !- High Humidity Outdoor Air Flow Ratio
Yes, !- Control High Indoor Humidity Based on Outdoor Humidity Ratio
BypassWhenWithinEconomizerLimits, !- Heat Recovery Bypass Control Type
InterlockedWithMechanicalCooling; !- Economizer Operation Staging
Controller:MechanicalVentilation,
Controller Mechanical Ventilation 1, !- Name
Always On Discrete, !- Availability Schedule Name
Yes, !- Demand Controlled Ventilation
IndoorAirQualityProcedure, !- System Outdoor Air Method
, !- Zone Maximum Outdoor Air Fraction {dimensionless}
...
_Common Zones, !- Design Specification Outdoor Air Object Name 4
, !- Design Specification Zone Air Distribution Object Name 4
Thermal Zone: L01_Multipurpose Room 1, !- Zone or ZoneList 5 Name
_Multipurpose, !- Design Specification Outdoor Air Object Name 5
, !- Design Specification Zone Air Distribution Object Name 5
With that configuration I get the following graphs:
It seems I cannot upload images :(
What I got is the following:
- 900ppm setpoint is reach in almost all year but the coldest ones (december and january)
- Max Air Flow in the Zone Air Termina is not reached at any point. In that cold days ventilation is 0, so that is the point of having so high CO2 levels (2400ppm instead of 900ppm setpoint)
I have checked the following:
- <zone air="" co2="" predicted="" load="" to="" setpoint="" mass="" flow="" rate=""> is showing proper values when DCV activated (YES)
- I have tried turning DCV off and <zone air="" co2="" predicted="" load="" to="" setpoint="" mass="" flow="" rate=""> is changed to 0, but results on Air Terminals Flow Rates are the same. It seems the DCV is not controlling Flow Rate with the Setpoint.
If anyone knows how to fix this please help me :)
February last week on the graph
