modelFlameRoomWithTubeBundle_L2_Dynamic

Model for a combustion chamber section with inner tube bundle heating surfaces
Diagram of FlameRoomWithTubeBundle_L2_Dynamic

Extends from ClaRa.Components.Furnace.BaseClasses.CombustionChamberBase, ClaRa.Components.Furnace.BaseClasses.CombustionChamberBase_additional_HPs, ClaRa.Basics.Icons.FlameRoomTubeBundle.

Information

Model description: A stationary model for furnace sections with convective tube bundles inside (additional heat ports)

FEATURES

  • This model uses TILMedia
  • Stationary mass and energy balances are used
  • Tube bundles are regarded with replaceable geometry models
  • Additional heat transfer ports to regard heat transfer for tube banks and carrier tubes
  • The formation enthalpy of the used fuel is calculated with the given Lower heating value and and ideal combustion with the given elemental composition of the fuel
  • Lower heating can be regarded with a fixed value or calculated according to the "Verbandsformel"
  • Different heat transfer correlations can be chosen
  • Capable to burn unburnt fuel from lower burner sections
  • Amount of burnable fuel mass is calculated with particle diffusity which depends on models used to determine the mean migration speed according to the volume flow rates of the flue gas

For detailed model documentation please consult the html-documentation shipped with ClaRa.

 


Authorship and Copyright Statement for original (initial) Contribution

Author:

DYNCAP/DYNSTART development team, Copyright © 2011-2024.

References:

For references please consult the html-documentation shipped with ClaRa.

Remarks:

This component was developed by ClaRa development team under the 3-clause BSD License.

Acknowledgements:

ClaRa originated from the collaborative research projects DYNCAP and DYNSTART. Both research projects were supported by the German Federal Ministry for Economic Affairs and Energy (FKZ 03ET2009 and FKZ 03ET7060).

CLA:

The author(s) have agreed to ClaRa CLA, version 1.0. See https://claralib.com/pdf/CLA.pdf

By agreeing to ClaRa CLA, version 1.0 the author has granted the ClaRa development team a permanent right to use and modify his initial contribution as well as to publish it or its modified versions under the 3-clause BSD License.

The ClaRa development team consists of the following partners:

TLK-Thermo GmbH (Braunschweig, Germany)

XRG Simulation GmbH (Hamburg, Germany).

Parameters

TypeNameDefaultDescription
RealT_0 (from CombustionChamberBase)298.15Reference temperature
Media Definitions
ClaRa.Basics.Media.FuelTypes.BaseFuelfuelModel (from CombustionChamberBase)simCenter.fuelModel1Fuel elemental composition used for combustion
ClaRa.Basics.Media.Slag.PartialSlagslagType (from CombustionChamberBase)simCenter.slagModelSlag properties
TILMedia.Gas.Types.BaseGasflueGas (from CombustionChamberBase)simCenter.flueGasModelFlue gas model used in component
Combustion Settings › Slag temperature definitions
IntegerslagTemperature_calculationType (from CombustionChamberBase)1Calculation type of outflowing slag temperature
ClaRa.Basics.Units.TemperatureT_slag (from CombustionChamberBase)900Constant slag outlet temperature
Nominal Values
ClaRa.Basics.Units.MassFlowRatem_flow_nom (from CombustionChamberBase)10Nominal mass flow rates at inlet
Initialisation
ClaRa.Basics.Units.Pressurep_start_flueGas_out (from CombustionChamberBase)1e5Start pressure at outlet
ClaRa.Basics.Units.TemperatureT_start_flueGas_out (from CombustionChamberBase)700Start temperature at outlet
ClaRa.Basics.Units.TemperatureT_top_initial (from CombustionChamberBase)T_start_flueGas_outInitial temperature of top volume
ClaRa.Basics.Units.MassFraction[flueGas.nc - 1]xi_start_flueGas_out (from CombustionChamberBase)flueGas.xi_defaultStart composition of flue gas
ClaRa.Basics.Units.EnthalpyMassSpecifich_start (from CombustionChamberBase)TILMedia.Gas.Functions.specificEnthalpy_pTxi(flueGas, p_start_flueGas_out, T_start_flueGas_out, xi_start_flueGas_out)Start flue gas enthalpy
BooleanuseHomotopysimCenter.useHomotopyTrue, if homotopy method is used during initialisation
Expert Settings
ClaRa.Basics.Units.TimeTau (from CombustionChamberBase)0.001Time constant for heat transfer temperature delay
Summary and Visualisation
BooleanshowData (from CombustionChamberBase)falseTrue, if characteristic data shall be visualised in model icon

Connectors

TypeNameDefaultDescription
ClaRa.Basics.Interfaces.FuelSlagFlueGas_inletinlet (from CombustionChamberBase)
ClaRa.Basics.Interfaces.FuelSlagFlueGas_outletoutlet (from CombustionChamberBase)
ClaRa.Basics.Interfaces.HeatPort_aheat_wall (from CombustionChamberBase)
ClaRa.Basics.Interfaces.HeatPort_aheat_top (from CombustionChamberBase)
ClaRa.Basics.Interfaces.HeatPort_aheat_bottom (from CombustionChamberBase)
ClaRa.Basics.Interfaces.EyeOutGaseyeOut (from CombustionChamberBase)
ClaRa.Basics.Interfaces.HeatPort_aheat_CarrierTubes (from CombustionChamberBase_additional_HPs)
ClaRa.Basics.Interfaces.HeatPort_aheat_TubeBundle (from CombustionChamberBase_additional_HPs)

Components

TypeNameDefaultDescription
ClaRa.SimCentersimCenter (from CombustionChamberBase)
ClaRa.Basics.Units.MassFraction[flueGas.nc - 1]xi_flueGas (from CombustionChamberBase)Flue gas composition
ClaRa.Basics.Units.MassFraction[fuelModel.N_c - 1]xi_fuel_out (from CombustionChamberBase)Fuel outlet composition
ClaRa.Basics.Units.AreaA_cross (from CombustionChamberBase)geo.A_frontCross section
ClaRa.Basics.Units.VolumeFlowRateV_flow_flueGas_in (from CombustionChamberBase)Inlet volume flow
ClaRa.Basics.Units.VolumeFlowRateV_flow_flueGas_out (from CombustionChamberBase)Outlet volume flow
ClaRa.Basics.Units.Massmass (from CombustionChamberBase)Gas mass
ClaRa.Basics.Units.HeatFlowRateQ_flow_top (from CombustionChamberBase)Heat flow from top section
ClaRa.Basics.Units.HeatFlowRateQ_flow_bottom (from CombustionChamberBase)Heat flow from bottom section
ClaRa.Basics.Units.HeatFlowRateQ_flow_wall (from CombustionChamberBase)Heat flow from walls
ClaRa.Basics.Units.MassFraction[fuelModel.N_e - 1]elementaryComposition_fuel_in (from CombustionChamberBase)Fuel inlet composition
ClaRa.Basics.Units.EnthalpyMassSpecifich_flueGas_out (from CombustionChamberBase)Gas outlet specific enthalpy
ClaRa.Basics.Units.EnthalpyMassSpecificLHV (from CombustionChamberBase)
ClaRa.Basics.Units.Timet_dwell_flueGas (from CombustionChamberBase)geo.height/particleMigration.wFlow time in z-direction
RealunburntFraction (from CombustionChamberBase)Quantatity describes how much unburned fuel leaves control volume together with the fluegas to neighbor cell
ClaRa.Basics.Units.MassFlowRatem_flow_oxygen_req (from CombustionChamberBase)Required O2 flow rate for stochiometric combustion
ClaRa.Basics.Units.MassFlowRatem_flow_air_req (from CombustionChamberBase)Required combustion air flow rate for stochiometric combustion determined in dependence of m_flow_oxygen_req and actual Xi of gasInlet
ClaRa.Basics.Units.MassFlowRatem_flow_fuel_burned (from CombustionChamberBase)Burned flue mass flow
ClaRa.Basics.Units.MassFlowRatem_flow_oxygen_burned (from CombustionChamberBase)Oxygen used for combustion
ReallambdaComb (from CombustionChamberBase)Excess air
ClaRa.Basics.Units.Pressurep (from CombustionChamberBase)Pressure inside volume
TILMedia.Gas.Gas_pTideal_combustion (from CombustionChamberBase)
Geometrygeo (from CombustionChamberBase)
HeatTransfer_Wallheattransfer_wall (from CombustionChamberBase)
HeatTransfer_Topheattransfer_top (from CombustionChamberBase)
ClaRa.Components.Furnace.GeneralTransportPhenomena.ThermalCapacities.ThermalLowPassradiationTimeConstant (from CombustionChamberBase)
ReactionZonereactionZone (from CombustionChamberBase)
Burning_timeburning_time (from CombustionChamberBase)
ParticleMigrationparticleMigration (from CombustionChamberBase)
PressureLosspressureLoss (from CombustionChamberBase)
HeatTransfer_CarrierTubesheattransfer_CarrierTubes (from CombustionChamberBase_additional_HPs)
HeatTransfer_TubeBundleheattransfer_TubeBundle (from CombustionChamberBase_additional_HPs)
ClaRa.Basics.Units.HeatFlowRateQ_flow_CarrierTubes (from CombustionChamberBase_additional_HPs)Heat flow from carrier tubes
ClaRa.Basics.Units.HeatFlowRateQ_flow_TubeBundle (from CombustionChamberBase_additional_HPs)Heat flow from tube bundle
TILMedia.Gas.Gas_phbulk
Summarysummary

Contents

NameDescription
Outline
Fuel
Slag
Flow
Summary

Revisions

For revisions please consult the html-documentation shipped with ClaRa.