modelBurner_L1
Extends from TransiEnt.Basics.Icons.Model (Icon for models).
Information
1. Purpose of model
This is a simple model of a combustion chamber.
2. Level of detail, physical effects considered, and physical insight
The combustion is assumed to be ideal so all the combustable components of the entering gas mixture are combusted 100%. Also a heat transfer is considered, a desired heat flow can be taken out of the system.
3. Limits of validity
This model is only valid if the share of uncombusted components is negligible. Also, it has to be ensured that there is enough oxygen for a complete combustion and the model only works with the real gas medium NG7_SG_O2.
4. Interfaces
gasPortIn: inlet of the mixture of fuel and air/oxygen
gasPortOut: outlet of the exhaust gas
heat: heat port
5. Nomenclature
: Mass fraction, molar mass, lower heating value, heat flow out of the combustion chamber, specific enthalpy, mass flow
6. Governing Equations
The outflowing mass fractions are determined using the stochiometry of the combustion reactions:
The lower heating value of the mixture is calculated using the LHV of the components and with this and the outflowing heat flow, the outflowing specific enthalpy is calculated:
7. Remarks for Usage
It has to be ensured that there is enough oxygen for a complete combustion. Also, the outlet temperature has to be below the limit of the TILMedia fluid models.
8. Validation
Tested in the check model "TestBurner_L1"
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.SpecificEnergy[medium.nc] | LHV_comp | {50010, 47480, 46350, 45720, 0, 0, 0, 10110, 0, 119952}*1e3 | Lower heating values of all components of vle_ng7_sg_o2 |
| SI.MolarMass[medium.nc] | M_comp | {0.01604, 0.03007, 0.04401, 0.05812, 0.02801, 0.04401, 0.01802, 0.02801, 0.03200, 0.00202} | Molar masses of all components of vle_ng7_sg_o2 |
| TransiEnt.Basics.Media.Gases.VLE_VDIWA_NG7_SG_O2_var | medium | Medium in the burner | |
| SI.SpecificEnthalpy | h_out_min | specificEnthalpy_pTxi(medium, p_out_minmax, T_out_min, xi_out_minmax) | Minimum specific enthalpy (for medium calculation) |
| SI.SpecificEnthalpy | h_out_max | specificEnthalpy_pTxi(medium, p_out_minmax, T_out_max, xi_out_minmax) | Maximum specific enthalpy (for medium calculation) |
| Fundamental Definitions | |||
| SI.PressureDifference | Delta_p | 0 | Constant pressure loss |
| Heat Transfer | |||
| SI.Temperature | T_heat | 1625 | Temperature of heat flow out of heat |
| Numerics | |||
| SI.Temperature | T_out_min | 0 + 273.15 | Minimum temperature (for medium calculation) |
| SI.Temperature | T_out_max | 1487 + 273.15 | Maximum temperature (for medium calculation) |
| SI.Pressure | p_out_minmax | 1e5 | Pressure for minimum and maximum specific enthalpy calculation |
| SI.MassFraction[medium.nc - 1] | xi_out_minmax | {0, 0, 0, 0, 0.727119, 0.144291, 0.108613, 0, 0.0200132} | Composition for minimum and maximum specific enthalpy calculation |
| Summary | |||
| Boolean | useFluidModelsForSummary | false | True, if fluid models shall be used for the summary |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| TransiEnt.Basics.Interfaces.Gas.RealGasPortIn | gasPortIn | ||
| TransiEnt.Basics.Interfaces.Gas.RealGasPortOut | gasPortOut | ||
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_b | heat |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| TransiEnt.SimCenter | simCenter | ||
| Summary | summary |
Contents
| Name | Description |
|---|---|
 Outlineprotected | |
 Summaryprotected |