LBL logo

Buildings.HeatTransfer.Data.Gases

Package with thermophysical properties for window fill gases

Information

Package with records for thermophysical properties for window gas fills. The implementation is according to ISO 15099:2003, Thermal performance of windows, doors and shading devices -- Detailed calculations.

Extends from Modelica.Icons.MaterialPropertiesPackage (Icon for package containing property classes).

Package Content

Name Description
Buildings.HeatTransfer.Data.Gases.Generic Generic Thermal properties of fill gas for windows
Buildings.HeatTransfer.Data.Gases.Air Air Thermophysical properties for air
Buildings.HeatTransfer.Data.Gases.Argon Argon Thermophysical properties for argon
Buildings.HeatTransfer.Data.Gases.Krypton Krypton Thermophysical properties for krypton
Buildings.HeatTransfer.Data.Gases.Xenon Xenon Thermophysical properties for krypton
Buildings.HeatTransfer.Data.Gases.thermalConductivity thermalConductivity Function to compute the thermal conductivity of gases
Buildings.HeatTransfer.Data.Gases.density density Function to compute the mass density
Buildings.HeatTransfer.Data.Gases.dynamicViscosity dynamicViscosity Function to compute the dynamic viscosity for gases
Buildings.HeatTransfer.Data.Gases.specificHeatCapacity specificHeatCapacity Function to compute the specific heat capacity for gases

Buildings.HeatTransfer.Data.Gases.Generic Buildings.HeatTransfer.Data.Gases.Generic

Thermal properties of fill gas for windows

Information

Generic record for thermophysical properties for window gas fills. The implementation is according to ISO 15099:2003, Thermal performance of windows, doors and shading devices -- Detailed calculations.

Extends from Modelica.Icons.Record (Icon for records).

Parameters

TypeNameDefaultDescription
Lengthx Gas layer thickness [m]
ThermalConductivitya_k Constant coefficient for thermal conductivity [W/(m.K)]
Realb_k Temperature dependent coefficient for thermal conductivity [W/(m.K2)]
DynamicViscositya_mu Constant coefficient for dynamic viscosity [Pa.s]
Realb_mu Temperature dependent coefficient for dynamic viscosity [N.s/(m2.K)]
SpecificHeatCapacitya_c Constant coefficient for specific heat capacity [J/(kg.K)]
Realb_c Temperature dependent coefficient for specific heat capacity [J/(kg.K2)]
MolarMassMM Molar mass (of mixture or single fluid) [kg/mol]
PressureP0101325Normal pressure [Pa]

Modelica definition

record Generic "Thermal properties of fill gas for windows" extends Modelica.Icons.Record; parameter Modelica.SIunits.Length x "Gas layer thickness"; parameter Modelica.SIunits.ThermalConductivity a_k "Constant coefficient for thermal conductivity"; parameter Real b_k(unit="W/(m.K2)") "Temperature dependent coefficient for thermal conductivity"; parameter Modelica.SIunits.DynamicViscosity a_mu "Constant coefficient for dynamic viscosity"; parameter Real b_mu(unit="N.s/(m2.K)") "Temperature dependent coefficient for dynamic viscosity"; parameter Modelica.SIunits.SpecificHeatCapacity a_c "Constant coefficient for specific heat capacity"; parameter Real b_c(unit="J/(kg.K2)") "Temperature dependent coefficient for specific heat capacity"; parameter Modelica.SIunits.MolarMass MM "Molar mass (of mixture or single fluid)"; parameter Modelica.SIunits.Pressure P0 = 101325 "Normal pressure"; end Generic;

Buildings.HeatTransfer.Data.Gases.Air Buildings.HeatTransfer.Data.Gases.Air

Thermophysical properties for air

Parameters

TypeNameDefaultDescription
Lengthx Gas layer thickness [m]
ThermalConductivitya_k2.873E-3Constant coefficient for thermal conductivity [W/(m.K)]
Realb_k7.760E-5Temperature dependent coefficient for thermal conductivity [W/(m.K2)]
DynamicViscositya_mu3.723E-6Constant coefficient for dynamic viscosity [Pa.s]
Realb_mu4.940E-8Temperature dependent coefficient for dynamic viscosity [N.s/(m2.K)]
SpecificHeatCapacitya_c1002.737Constant coefficient for specific heat capacity [J/(kg.K)]
Realb_c1.2324E-2Temperature dependent coefficient for specific heat capacity [J/(kg.K2)]
MolarMassMM28.97E-3Molar mass (of mixture or single fluid) [kg/mol]
PressureP0101325Normal pressure [Pa]

Modelica definition

record Air = Generic(a_k= 2.873E-3, b_k= 7.760E-5, a_mu=3.723E-6, b_mu=4.940E-8, a_c=1002.737, b_c= 1.2324E-2, MM=28.97E-3) "Thermophysical properties for air";

Buildings.HeatTransfer.Data.Gases.Argon Buildings.HeatTransfer.Data.Gases.Argon

Thermophysical properties for argon

Parameters

TypeNameDefaultDescription
Lengthx Gas layer thickness [m]
ThermalConductivitya_k2.285E-3Constant coefficient for thermal conductivity [W/(m.K)]
Realb_k5.149E-5Temperature dependent coefficient for thermal conductivity [W/(m.K2)]
DynamicViscositya_mu3.379E-6Constant coefficient for dynamic viscosity [Pa.s]
Realb_mu6.451E-8Temperature dependent coefficient for dynamic viscosity [N.s/(m2.K)]
SpecificHeatCapacitya_c521.9285Constant coefficient for specific heat capacity [J/(kg.K)]
Realb_c0Temperature dependent coefficient for specific heat capacity [J/(kg.K2)]
MolarMassMM39.948E-3Molar mass (of mixture or single fluid) [kg/mol]
PressureP0101325Normal pressure [Pa]

Modelica definition

record Argon = Generic(a_k= 2.285E-3, b_k= 5.149E-5, a_mu=3.379E-6, b_mu=6.451E-8, a_c=521.9285, b_c= 0, MM=39.948E-3) "Thermophysical properties for argon";

Buildings.HeatTransfer.Data.Gases.Krypton Buildings.HeatTransfer.Data.Gases.Krypton

Thermophysical properties for krypton

Parameters

TypeNameDefaultDescription
Lengthx Gas layer thickness [m]
ThermalConductivitya_k9.443E-4Constant coefficient for thermal conductivity [W/(m.K)]
Realb_k2.826E-5Temperature dependent coefficient for thermal conductivity [W/(m.K2)]
DynamicViscositya_mu2.213E-6Constant coefficient for dynamic viscosity [Pa.s]
Realb_mu7.777E-8Temperature dependent coefficient for dynamic viscosity [N.s/(m2.K)]
SpecificHeatCapacitya_c248.0907Constant coefficient for specific heat capacity [J/(kg.K)]
Realb_c0Temperature dependent coefficient for specific heat capacity [J/(kg.K2)]
MolarMassMM83.80E-3Molar mass (of mixture or single fluid) [kg/mol]
PressureP0101325Normal pressure [Pa]

Modelica definition

record Krypton = Generic(a_k= 9.443E-4, b_k= 2.826E-5, a_mu=2.213E-6, b_mu=7.777E-8, a_c=248.0907, b_c= 0, MM=83.80E-3) "Thermophysical properties for krypton";

Buildings.HeatTransfer.Data.Gases.Xenon Buildings.HeatTransfer.Data.Gases.Xenon

Thermophysical properties for krypton

Parameters

TypeNameDefaultDescription
Lengthx Gas layer thickness [m]
ThermalConductivitya_k4.538E-4Constant coefficient for thermal conductivity [W/(m.K)]
Realb_k1.723E-5Temperature dependent coefficient for thermal conductivity [W/(m.K2)]
DynamicViscositya_mu1.069E-6Constant coefficient for dynamic viscosity [Pa.s]
Realb_mu7.414E-8Temperature dependent coefficient for dynamic viscosity [N.s/(m2.K)]
SpecificHeatCapacitya_c158.3397Constant coefficient for specific heat capacity [J/(kg.K)]
Realb_c0Temperature dependent coefficient for specific heat capacity [J/(kg.K2)]
MolarMassMM131.3E-3Molar mass (of mixture or single fluid) [kg/mol]
PressureP0101325Normal pressure [Pa]

Modelica definition

record Xenon = Generic(a_k= 4.538E-4, b_k= 1.723E-5, a_mu=1.069E-6, b_mu=7.414E-8, a_c=158.3397, b_c= 0, MM=131.3E-3) "Thermophysical properties for krypton";

Buildings.HeatTransfer.Data.Gases.thermalConductivity

Function to compute the thermal conductivity of gases

Inputs

TypeNameDefaultDescription
Genericgas Record of gas data
TemperatureT Gas temperature [K]

Outputs

TypeNameDescription
ThermalConductivitykThermal conductivity [W/(m.K)]

Modelica definition

function thermalConductivity "Function to compute the thermal conductivity of gases" input Buildings.HeatTransfer.Data.Gases.Generic gas "Record of gas data"; input Modelica.SIunits.Temperature T "Gas temperature"; output Modelica.SIunits.ThermalConductivity k "Thermal conductivity"; algorithm k := gas.a_k + gas.b_k*T; end thermalConductivity;

Buildings.HeatTransfer.Data.Gases.density

Function to compute the mass density

Inputs

TypeNameDefaultDescription
Genericgas Record of gas data
TemperatureT Gas temperature [K]

Outputs

TypeNameDescription
DensityrhoMass density [kg/m3]

Modelica definition

function density "Function to compute the mass density" input Buildings.HeatTransfer.Data.Gases.Generic gas "Record of gas data"; input Modelica.SIunits.Temperature T "Gas temperature"; output Modelica.SIunits.Density rho "Mass density"; algorithm rho := gas.P0*gas.MM/Modelica.Constants.R/T; end density;

Buildings.HeatTransfer.Data.Gases.dynamicViscosity

Function to compute the dynamic viscosity for gases

Inputs

TypeNameDefaultDescription
Genericgas Record of gas data
TemperatureT Gas temperature [K]

Outputs

TypeNameDescription
DynamicViscositymuDynamic viscosity [Pa.s]

Modelica definition

function dynamicViscosity "Function to compute the dynamic viscosity for gases" input Buildings.HeatTransfer.Data.Gases.Generic gas "Record of gas data"; input Modelica.SIunits.Temperature T "Gas temperature"; output Modelica.SIunits.DynamicViscosity mu "Dynamic viscosity"; algorithm mu := gas.a_mu + gas.b_mu*T; end dynamicViscosity;

Buildings.HeatTransfer.Data.Gases.specificHeatCapacity

Function to compute the specific heat capacity for gases

Inputs

TypeNameDefaultDescription
Genericgas Record of gas data
TemperatureT Gas temperature [K]

Outputs

TypeNameDescription
SpecificHeatCapacityc_pSpecific heat capacity [J/(kg.K)]

Modelica definition

function specificHeatCapacity "Function to compute the specific heat capacity for gases" input Buildings.HeatTransfer.Data.Gases.Generic gas "Record of gas data"; input Modelica.SIunits.Temperature T "Gas temperature"; output Modelica.SIunits.SpecificHeatCapacity c_p "Specific heat capacity"; algorithm c_p := gas.a_c + gas.b_c*T; end specificHeatCapacity;

http://simulationresearch.lbl.gov/modelica