modelRadiation_gas2Gas_advanced_L2

All Geo || L2 || Radiation Between Gas Volumes (Advanced)

Diagram of Radiation_gas2Gas_advanced_L2

Extends from ClaRa.Basics.ControlVolumes.Fundamentals.HeatTransport.Gas_HT.Radiation.HeatTransfer_L2, ClaRa.Basics.Icons.Epsilon.

Information

Model description: A correlation for radiant heat transfer between gas volume surfaces inside furnaces

FEATURES

This model uses TILMedia
Emissivity and Absorbance of flue gas can be calculated
Emissivity of particles is regarded as constant value
Configuration factors are regarded (radiating gas volumes are treated as radiating surfaces)
Equations according to: VDI-Wärmeatlas: 10. bearbeitete und erweiterte Auflage, 2006, chapters Kb and Kc

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

Authorship and Copyright Statement for original (initial) Contribution

Author:

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

Type	Name	Default	Description
String	gas (from HeatTransferBaseGas)	"true"
Boolean	useHomotopy (from HeatTransfer_L2)
Emissivity and absorbance factor calculation of the suspension volume
String	suspension_calculationType	"Fixed"	Calculation type
Real	emissivity_source_fixed	0.9	Fixed value for source emissivity
Real	emissivity_sink_fixed	0.9	Fixed value for sink emissivity
Real	absorbance_source_fixed	0.9	Fixed value for source absorbance
Real	emissivity_particle_source	0.2	Value considering dust particles if emissivity and absorbance are calculated
Real	emissivity_particle_sink	0.2	Value considering dust particles if emissivity and absorbance are calculated
Soot particle properties
ClaRa.Basics.Units.DensityMassSpecific	soot_load_n	163.5e-6	Amount of soot inside the products at standard temperature and pressure
Coal particle properties
ClaRa.Basics.Units.MassFraction	x_coke	0.1	Coke fraction of used coal
ClaRa.Basics.Units.DensityMassSpecific	d_coke	850	Coke density
ClaRa.Basics.Units.Length	diameter_mean_coke	65e-6	Mean weighted diameter of coke particles (Rosin-Rammler-Distribution)
Real	n_var_coke	1.5	Variance parameter of coke particle distribution (Rosin-Rammler-Distribution)
Real	Q_mean_abs_coke	0.85	Mean relative cross section for absorption of coke particles
Ash particle properties
ClaRa.Basics.Units.DensityMassSpecific	d_ash	2200	Ash density
ClaRa.Basics.Units.Length	diameter_mean_ash	16.8e-6	Mean weighted diameter of ash particles (Rosin-Rammler-Distribution)
Real	n_var_ash	1.5	Variance parameter of ash particle distribution (Rosin-Rammler-Distribution)
Real	Q_m_abs_ash	0.2	Mean relative cross section for absorption of ash particles

Connectors

Type	Name	Default	Description
ClaRa.Basics.Interfaces.HeatPort_a	heat (from HeatTransfer_L2)

Components

Type	Name	Description
ClaRa.Basics.Records.IComGas_L2	iCom
Units.Temperature	T_mean	Mean temperature
Real	emissivity_source	Emissivity of radiation source
Real	emissivity_sink	Emissivity of radiation sink
Real	absorbance_source	Absorbance of radiation source
Real	s_gl	Equivalent thickness

Revisions

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