modelWobbeGCVSensor

Sensor calculating the Wobbe-Index and gross calorific value for for real gas mixtures

Information

1. Purpose of model

Gross Wobbe index and gross calorific value sensor for VLEFluidTypes.

2. Level of detail, physical effects considered, and physical insight

(no remarks)

3. Limits of validity

Can only be used for VLEFluidTypes.

4. Interfaces

GasPortIn, GasPortOut and RealOutputs for Wobbe index and GCV.

5. Nomenclature

Gross Wobbe index in J/m3 stp

GCV in [J/kg]

6. Governing Equations

GCV = sum(xi_i*GCV_i)

W_S_stp = GCV*rho_stp/sqrt(rho_stp/rho_air_stp)

7. Remarks for Usage

Gross calorific values of the pure components are defined in the record TransiEnt.Basics.Records.GasProperties.GrossCalorificValues.

8. Validation

Tested in check model "TransiEnt.Components.Sensors.RealGas.Check.TestRealGasSensors"

9. References

(no remarks)

10. Version History

Model created by Lisa Andresen (andresen@tuhh.de) in Jun 2016

Type	Name	Default	Description
Modelica.Units.SI.Density	rho_air_stp	1.2931	Density of ambient air at T=273.15 K, p=1 bar
Fundamental Definitions
TILMedia.VLEFluidTypes.BaseVLEFluid	medium (from RealGas_SensorBase)	simCenter.gasModel1	Medium to be used
SI.MassFraction[medium.nc - 1]	xi_start	medium.xi_default	Initial composition
Integer	flowDefinition	1	Defines which flow direction is considered

Type	Name	Description
TransiEnt.Basics.Interfaces.Gas.RealGasPortIn	gasPortIn (from RealGas_SensorBase)	Inlet port
TransiEnt.Basics.Interfaces.Gas.RealGasPortOut	gasPortOut (from RealGas_SensorBase)	Outlet port
TransiEnt.Basics.Interfaces.General.EnergyDensityOut	W_S_stp	Wobbe Index of composition at STP
TransiEnt.Basics.Interfaces.General.SpecificEnthalpyOut	GCV	Gross calorific value

Type	Name	Default	Description
TransiEnt.SimCenter	simCenter (from RealGas_SensorBase)