modelControllerAirForBurner
Extends from TransiEnt.Basics.Icons.Controller (Icon for controller).
Information
1. Purpose of model
This is a controller to control the air mass flow for given fuel mass flow rate and composition as well as air excess ratio.
2. Level of detail, physical effects considered, and physical insight
The composition and mass flow rate of the fuel are measured and the necessary air is calculated. For the mass fraction of oxygen in air, 0.233 is assumed.
3. Limits of validity
The validity is limited because the composition is measured ideally and continuously which is not possible in reality.
4. Interfaces
m_flow_fuel: input for the fuel mass flow rate in [kg/s]
xi: input for the mass fractions of the fuel [kg/kg]
m_flow_air_source: output for the air mass flow rate (negative sign) in [kg/s]
5. Nomenclature
(no remarks)
6. Governing Equations
The minimum oxygen mass flow for a stochiometric complete combustion is calculated according to the reactions of the components CO, H2, CH4, C2H6, C3H8, C4H10. The hyperstochiometric air mass flow is calculated by dividing the minimum oxygen mass flow by the mass fraction of oxygen in air and multiplying it with the excess air ratio.
7. Remarks for Usage
(no remarks)
8. Validation
(no remarks)
9. References
(no remarks)
10. Version History
Model created by Carsten Bode (c.bode@tuhh.de) on Tue Apr 05 2016
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.MolarMass | M_CH4 | 0.01604 | Molar mass of methane |
| SI.MolarMass | M_C2H6 | 0.03007 | Molar mass of ethane |
| SI.MolarMass | M_C3H8 | 0.04410 | Molar mass of propane |
| SI.MolarMass | M_C4H10 | 0.05812 | Molar mass of butane |
| SI.MolarMass | M_O2 | 0.03200 | Molar mass of oxygen |
| SI.MolarMass | M_CO | 0.02801 | Molar mass of carbonmonoxide |
| SI.MolarMass | M_H2 | 0.00202 | Molar mass of hydrogen |
| SI.MassFraction | xi_O2_air | 0.233 | Mass fraction of oxygen in air (that consists only of n2 and o2) |
| TransiEnt.Basics.Media.Gases.VLE_VDIWA_NG7_SG_O2_var | vle_ng7_sg_o2 | Medium to be used | |
| Fundamental Definitions | |||
| Real | lambda | 1.1 | Excess air ratio |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| TransiEnt.Basics.Interfaces.General.MassFractionIn[vle_ng7_sg_o2.nc] | xi | Mass composition of the fuel in vle_ng7_sg_o2 | |
| TransiEnt.Basics.Interfaces.General.MassFlowRateIn | m_flow_fuel | Fuel mass flow rate | |
| TransiEnt.Basics.Interfaces.General.MassFlowRateOut | m_flow_air_source | Air mass flow rate for given lambda, negative because it is an input for a mass flow source |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| TransiEnt.SimCenter | simCenter | ||
| SI.MassFlowRate | m_flow_o2_stoch | Oxygen mass flow rate for stochiometric combustion | |
| SI.MassFlowRate | m_flow_air_stoch | Air mass flow rate for stochiometric combustion |