modelRoomVAV

Model for CO2 emitted by people
Diagram of RoomVAVOpen the diagram
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Information

Model of a room and a plenum. CO2 is injected into the room. An air damper controls how much air flows into the room to track the CO2 level.

Parameters

TypeNameDefaultDescription
Modelica.Units.SI.VolumeVRooVolume of room
Modelica.Units.SI.VolumeVPleVolume of plenum
Modelica.Units.SI.AreaADamDamper face area
Modelica.Units.SI.MassFlowRatem_flow_nominalNominal mass flow rate
Damper coefficients
Reall0.0001Damper leakage, ratio of flow coefficients k(y=0)/k(y=1)

Connectors

TypeNameDefaultDescription
Modelica.Fluid.Interfaces.FluidPort_aportRoo1Fluid port
Modelica.Fluid.Interfaces.FluidPort_aportSupFluid port
Modelica.Fluid.Interfaces.FluidPort_aportRetFluid port
Modelica.Fluid.Interfaces.FluidPort_aportRoo2Fluid port
Modelica.Blocks.Interfaces.RealOutputyDamDamper control signal
Modelica.Blocks.Interfaces.RealInputnPeoNumber of people

Components

TypeNameDefaultDescription
Buildings.Fluid.Actuators.Dampers.Exponentialvav
Buildings.Fluid.MixingVolumes.MixingVolumevolRoom volume
Buildings.Fluid.Sensors.TraceSubstancessenCO2Sensor at volume
Buildings.Fluid.MixingVolumes.MixingVolumeplePlenum volume
Modelica.Blocks.Math.GaingaiCO2CO2 emission per person
Buildings.Fluid.Sensors.Conversions.To_VolumeFractionvolFraCO2CO2 volume fraction
DamperControlconDamper controller
Modelica.Blocks.Math.GainpeoDenPeople density per m2
Modelica.Blocks.Sources.RealExpressionvavACHVAV box air change per hour
Buildings.Fluid.FixedResistances.PressureDropdpPle

Contents

NameDescription
MediumMedium in the component

Revisions

  • January 23, 2017, by Michael Wetter:
    Removed allowFlowReversal=false as roo.roo49.dpPle.port_a.m_flow and roo.roo50.dpPle.port_a.m_flow have negative mass flow rates.
  • January 20, 2017, by Michael Wetter:
    Removed the use of TraceSubstancesFlowSource and instead used the input connector C_flow of the volume. This reduces computing time from 25 to 12 seconds.
    This is for #628.
  • July 20, 2007 by Michael Wetter:
    First implementation.