modelVDIHeatAtlas
VDI Heat Atlas
Extends from TransiEnt.Storage.Heat.PackedBedStorage_L4.Basics.EffectiveThermalConductivity.ThermalConductivityBasePackedBed (Partial thermal conductivity model for packed beds).
Information
1. Purpose of model
Superposition of the effective thermal conductivity of packed bed at stagnant fluid according to model by Zehner/Bauer/Schlünder and a flow dependend contribution proportional to the peclet number
2. Level of detail, physical effects considered, and physical insight
(Description)
3. Limits of validity
(Description)
4. Interfaces
(none)
5. Nomenclature
(no elements)
6. Governing Equations
(no equations)
7. Remarks for Usage
(none)
8. Validation
(no validation or testing necessary)
9. References
German Association of Engineers, Heat Atlas, 11th ed., 2013., section Mh and Dee
10. Version History
Model created by Michael von der Heyde (heyde@tuhh.de) for the FES research project, March 2021
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| String | gas (from ThermalConductivityBasePackedBed) | "true" | |
| Boolean | useHomotopy (from ThermalConductivityBasePackedBed) | ||
| Real | epsilon | 0.85 | Long wave emission factor |
| Real | CF | 1.4 | Additional form factor |
| Real | Phi | 0.001 | Form Coefficient Phi |
| Real | K_ax | 2 | Axial correction factor |
| Real | K_rad | 5.7 | Radial correction factor |
| Real | B | CF*((1 - iCom.porosity)/iCom.porosity)^(10/9) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| TransiEnt.Storage.Heat.PackedBedStorage_L4.Basics.Records.IComPackedBedControlVolume_L4 | iCom (from ThermalConductivityBasePackedBed) | ||
| TransiEnt.Storage.Heat.PackedBedStorage_L4.Basics.PackedBedGeometry.PackedBedGeometry_N_cv | geo (from ThermalConductivityBasePackedBed) | ||
| SI.MassFlowRate[iCom.N_cv + 1] | m_flow (from ThermalConductivityBasePackedBed) | Mass flow rate | |
| SI.Power[iCom.N_cv + 1] | Q_flow (from ThermalConductivityBasePackedBed) | Heat Conduction between cells | |
| SI.ThermalConductivity[iCom.N_cv] | lambda_eff_axial (from ThermalConductivityBasePackedBed) | Effective Thermal Conductivity of Packed Bed | |
| SI.ThermalConductivity[iCom.N_cv] | lambda_eff_radial (from ThermalConductivityBasePackedBed) | Effective Thermal Conductivity of Packed Bed | |
| TILMedia.Gas_ph[iCom.N_cv] | fluid | ||
| TransiEnt.Basics.Media.SolidWithTemperatureVariantHeatCapacity[iCom.N_cv] | rock | ||
| ClaRa.Basics.Units.ThermalConductivity | lambda_eff_0 | Effective Thermal Conductivity of Packed Bed at stagnant fluid |