modelThermalZone

Thermal zone model
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Information

This model consist a building envelope model which is extented from Buildings.ThermalZones.Detailed.MixedAir.

Internal heat gain which includes radiative heat gain qRadGai_flow, convective heat gain qConGai_flow, and latent heat gain qLatGai_flow are referenced from ASHRAE Handbook fundamental. The factor gainFactor is used to scale up/down the heat gain. The gain schdule is specified by intLoad. A constant air infiltration from outside is assumed.

Parameters

TypeNameDefaultDescription
RealgainFactorIHG fluctuating amplitude factor
RealVInf_flow(roo.AFlo*roo.hRoo)*0.5/3600Infiltration volume flow rate
Modelica.Units.SI.AngleS_Buildings.Types.Azimuth.SAzimuth for south walls
Modelica.Units.SI.AngleE_Buildings.Types.Azimuth.EAzimuth for east walls
Modelica.Units.SI.AngleW_Buildings.Types.Azimuth.WAzimuth for west walls
Modelica.Units.SI.AngleN_Buildings.Types.Azimuth.NAzimuth for north walls
Modelica.Units.SI.AngleC_Buildings.Types.Tilt.CeilingTilt for ceiling
Modelica.Units.SI.AngleF_Buildings.Types.Tilt.FloorTilt for floor
Modelica.Units.SI.AngleZ_Buildings.Types.Tilt.WallTilt for wall
HeatTransfer.Data.Solids.PlywoodmatFurMaterial for furniture
HeatTransfer.Data.Solids.ConcretematConConcrete
HeatTransfer.Data.Solids.PlywoodmatWooWood for exterior construction
HeatTransfer.Data.Solids.GenericmatInsSteelframe construction with insulation
HeatTransfer.Data.Solids.GypsumBoardmatGypGypsum board
HeatTransfer.Data.Solids.GypsumBoardmatGyp2Gypsum board
HeatTransfer.Data.OpaqueConstructions.GenericconExtWalExterior construction
HeatTransfer.Data.OpaqueConstructions.GenericconIntWalInterior wall construction
HeatTransfer.Data.OpaqueConstructions.GenericconFloFloor construction (opa_a is carpet)
HeatTransfer.Data.Solids.PlywoodmatCarTraWood for floor
HeatTransfer.Data.GlazingSystems.DoubleClearAir13ClearglaSysData record for the glazing system

Connectors

TypeNameDefaultDescription
Modelica.Blocks.Interfaces.RealOutputTRooAirRoom air temperatures
Modelica.Blocks.Interfaces.RealOutputEHeaCooling energy provided to the zone from the HVAC system
Modelica.Blocks.Interfaces.RealOutputECooCooling energy provided to the zone from the HVAC system
Modelica.Fluid.Vessels.BaseClasses.VesselFluidPorts_b[2]portsInOutFluid inlets and outlets
Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_aheaPorWal1Heat port connected to common wall
Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_aheaPorFloHeat port connected to floor
Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_bheaPorCeiHeat port connected to ceiling
Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_bheaPorWal2Heat port connected to common wall
Buildings.BoundaryConditions.WeatherData.BusweaBusWeather data bus

Components

TypeNameDefaultDescription
Buildings.ThermalZones.Detailed.MixedAirrooRoom model, adapted from BESTEST Case 600 and VAVReheat model (for constructions)
Modelica.Blocks.Sources.ConstantqConGai_flowConvective heat gain
Modelica.Blocks.Sources.ConstantqRadGai_flowRadiative heat gain
Modelica.Blocks.Sources.ConstantqLatGai_flowLatent heat gain
Modelica.Blocks.Routing.Multiplex3multiplex3_1Sum of heat gain
Modelica.Blocks.Sources.ConstantuShaControl signal for the shading device
Modelica.Blocks.Math.Productproduct1Scheduled radiative heat gain
Modelica.Blocks.Math.GaingainFactorized radiative heat gain
Modelica.Blocks.Math.Productproduct2Scheduled convective heat gain
Modelica.Blocks.Math.Gaingain1Factorized convective heat gain
Modelica.Blocks.Math.Productproduct3Scheduled latent heat gain
Modelica.Blocks.Math.Gaingain2Factorized latent heat gain
Modelica.Blocks.Math.AddpowCalPower calculation, with cooling negative and heating positive
Modelica.Thermal.HeatTransfer.Sensors.TemperatureSensorrooAirTemAir temperature sensor
Buildings.Examples.ScalableBenchmarks.BuildingVAV.BaseClasses.IntLoadintLoadInternal load schedule
Fluid.Sources.MassFlowSource_WeatherDatasouExfSource model for air exfiltration
Fluid.Sources.MassFlowSource_WeatherDatasouInf2Source model for air infiltration

Contents

NameDescription
MediumAMedium model

Revisions

  • September 16, 2021, by Michael Wetter:
    Removed parameter lat as this is now obtained from the weather data reader.
    This is for IBPSA, #1477.
  • August 13, 2021, by Michael Wetter:
    Reimplemented computation of energy provided by HVAC system to also include the latent load. The new implementation uses the enthalpy sensor, and therefore the mass flow rate and temperature sensors have been removed.
  • April 10, 2017, by Jianjun Hu:
    First implementation.