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4.3.43. STEBBS#
STEBBS (Surface Temperature Energy Balance for Building Surfaces) model parameters.
Controls the building energy balance calculations including internal heating/cooling, building materials properties, and thermal behaviour.
Parameters:
- WallInternalConvectionCoefficient#
Internal convection coefficient of walls [W m-2 K-1]
- Unit:
W m-2 K-1
- Example:
7.69- Default Description:
Default value calculated from the CIBSE GUIDE A, Table 3.47, Page 176
- Range Description:
Value must be greater than zero.
- RoofInternalConvectionCoefficient#
Internal convection coefficient of roof [W m-2 K-1]
- Unit:
W m-2 K-1
- Example:
10.0
- InternalMassConvectionCoefficient#
Convection coefficient of internal mass [W m-2 K-1]
- Unit:
W m-2 K-1
- Example:
7.69
- FloorInternalConvectionCoefficient#
Internal convection coefficient of ground floor [W m-2 K-1]
- Unit:
W m-2 K-1
- Example:
5.88
- WindowInternalConvectionCoefficient#
Internal convection coefficient of windows [W m-2 K-1]
- Unit:
W m-2 K-1
- Example:
7.69
- WallExternalConvectionCoefficient#
Initial external convection coefficient of walls and roof [W m-2 K-1]
- Unit:
W m-2 K-1
- Example:
25.0
- RoofExternalConvectionCoefficient#
Initial external convection coefficient of roof [W m-2 K-1]
- Unit:
W m-2 K-1
- Example:
25.0
- WindowExternalConvectionCoefficient#
Initial external convection coefficient of windows [W m-2 K-1]
- Unit:
W m-2 K-1
- Example:
25.0
- GroundDepth#
Depth of external ground (deep soil) [m]
- Unit:
m
- Example:
3.0
- ExternalGroundConductivity#
External ground thermal conductivity
- Unit:
W m-1 K-1
- Example:
0.193
- MetabolismThreshold#
threshold of metabolic rate to determine occupancy active or inactive [W]
- Unit:
W
- Example:
74.3
- LatentSensibleRatio#
Latent-to-sensible ratio of metabolic energy release of occupants [-]
- Unit:
dimensionless
- Example:
0.0
- HeatingSystemEfficiency#
Efficiency of space heating system [-]
- Unit:
dimensionless
- Example:
0.9
- MaxCoolingPower#
Maximum power demand of cooling system [W]
- Unit:
W
- Example:
0.0
- CoolingSystemCOP#
Coefficient of performance of cooling system [-]
- Unit:
dimensionless
- Example:
3.4
- VentilationRate#
Ventilation rate (air changes per hour, ACH) [h-1]
- Unit:
h-1
- Example:
0.0
- InitialOutdoorTemperature#
Initial outdoor temperature [degC]
- Unit:
degC
- Example:
0.0
- InitialIndoorTemperature#
Initial indoor temperature [degC]
- Unit:
degC
- Example:
0.0
- DeepSoilTemperature#
Initial deep soil temperature [degC]
- Unit:
degC
- Example:
10.0
- WaterTankWallThickness#
Hot water tank wall thickness [m]
- Unit:
m
- Example:
0.01
- MainsWaterTemperature#
Temperature of water coming into the water tank [degC]
- Unit:
degC
- Example:
0.0
- WaterTankSurfaceArea#
Surface area of hot water tank cylinder [m2]
- Unit:
m2
- Example:
2.0
- HotWaterHeatingSetpointTemperature#
Water tank setpoint temperature [degC]
- Unit:
degC
- Example:
60.0
- HotWaterTankWallEmissivity#
Effective external wall emissivity of the hot water tank [-]
- Unit:
dimensionless
- Example:
0.0
- DHWVesselWallThickness#
Hot water vessel wall thickness [m]
- Unit:
m
- Example:
0.005
- DHWWaterVolume#
Volume of water held in use in building [m3]
- Unit:
m3
- Example:
0.05- Default Description:
Missing default explanation.
- Range Description:
Missing range explanation.
- DHWSurfaceArea#
Surface area of hot water in vessels in building [m2]
- Unit:
m2
- Example:
0.5
- HotWaterFlowRate#
Hot water flow rate from tank to vessel [m3 s-1]
- Unit:
m3 s-1
- Example:
0.0
- HotWaterFlowProfile#
Profile of hot water flow rate from tank to vessel [m3 s-1]
- Unit:
m3 s-1
The
HotWaterFlowProfileparameter group is defined by the Ten Minute Profile structure.
- DHWSpecificHeatCapacity#
Specific heat capacity of hot water [J kg-1 K-1]
- Unit:
J kg-1 K-1
- Example:
4186.0
- HotWaterTankSpecificHeatCapacity#
Specific heat capacity of hot water tank wall [J kg-1 K-1]
- Unit:
J kg-1 K-1
- Example:
500.0
- DHWVesselSpecificHeatCapacity#
Specific heat capacity of vessels containing hot water in use in buildings [J kg-1 K-1]
- Unit:
J kg-1 K-1
- Example:
500.0
- DHWDensity#
Density of hot water in use [kg m-3]
- Unit:
kg m-3
- Example:
1000.0
- HotWaterTankWallDensity#
Density of hot water tank wall [kg m-3]
- Unit:
kg m-3
- Example:
2500.0
- DHWVesselDensity#
Density of vessels containing hot water in use [kg m-3]
- Unit:
kg m-3
- Example:
2500.0
- HotWaterTankBuildingWallViewFactor#
Water tank/vessel internal building wall/roof view factor [-]
- Unit:
dimensionless
- Example:
0.0
- HotWaterTankInternalMassViewFactor#
Water tank/vessel building internal mass view factor [-]
- Unit:
dimensionless
- Example:
0.0
- HotWaterTankWallConductivity#
Effective wall conductivity of the hot water tank [W m-1 K-1]
- Unit:
W m-1 K-1
- Example:
0.5
- HotWaterTankInternalWallConvectionCoefficient#
Effective internal wall convection coefficient of the hot water tank [W m-2 K-1]
- Unit:
W m-2 K-1
- Example:
7.7
- HotWaterTankExternalWallConvectionCoefficient#
Effective external wall convection coefficient of the hot water tank [W m-2 K-1]
- Unit:
W m-2 K-1
- Example:
7.7
- DHWVesselWallConductivity#
Effective wall conductivity of the hot water tank [W m-1 K-1]
- Unit:
W m-1 K-1
- Example:
0.5
- DHWVesselInternalWallConvectionCoefficient#
Effective internal wall convection coefficient of the vessels holding hot water in use in building [W m-2 K-1]
- Unit:
W m-2 K-1
- Example:
7.7
- DHWVesselExternalWallConvectionCoefficient#
Effective external wall convection coefficient of the vessels holding hot water in use in building [W m-2 K-1]
- Unit:
W m-2 K-1
- Example:
7.7
- DHWVesselWallEmissivity#
Effective external wall emissivity of hot water being used within building [-]
- Unit:
dimensionless
- Example:
0.9
- HotWaterHeatingEfficiency#
Efficiency of hot water system [-]
- Unit:
dimensionless
- Example:
0.9
- MinimumVolumeOfDHWinUse#
Minimum volume of hot water in use [m3]
- Unit:
m3
- Example:
0.0
- MaximumVolumeOfDHWinUse#
Maximum volume of hot water in use [m3]. Default is arbitrary placeholder to be refined with validation.
- Unit:
m3
- Example:
100.0
- ApplianceProfile#
10-minute profile of appliance usage factor in building [-]
- Unit:
dimensionless
The
ApplianceProfileparameter group is defined by the Ten Minute Profile structure.
- ref#
The
refparameter group is defined by the Reference Info structure.