modelPB2Wall_Schluender
Extends from TransiEnt.Storage.Heat.PackedBedStorage_L4.Basics.HeatTransfer.PackedBedToWall.HeatTransferBasePB2Wall (Partial heat transfer model for packed Bed 2 Wall heat transfer).
Information
1. Purpose of model
Heat transfer correlation packed bed to wall according to Schlünder et al
2. Level of detail, physical effects considered, and physical insight
(Description)
3. Limits of validity
The correlation is only valid, if the temperature field inside the packed bed is discretized in lateral direction / towards the wall, such as in two-dimensional or three dimensional model, as the temperature profile inside the packed bed is not accounted for
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, VDI Heat Atlas, 11th ed., 2013. section MG 11
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 HeatTransferBasePB2Wall) | "true" | |
| Boolean | useHomotopy (from HeatTransferBasePB2Wall) | ||
| Real | delta | 5e-6 | Surface Roughness of particles |
| Real | C_w_bed | 5.67e-8/(1/eps_w + 1/eps_bed - 1) | formula 45d |
| Real | lambda_g | 0.05 | heat conductivity of air at 400°C to simplify |
| Real | L | 0.03359/1e5 | Value from VDI heat atlas for air, at t=60°C to simplify |
| Air to Rock Heat Transfer Nusselt Number Approximation | |||
| Real | Phi | 0.8 | Partition of wall area in contact with particles |
| Real | eps_w | 0.9 | Emission Coefficient of wall |
| Real | eps_bed | 0.9 | Emission Coefficient of Bed |
| Internals | |||
| SI.Area | A_heat | geo.A_heat | Area of heat transfer is lateral surface |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| ClaRa.Basics.Interfaces.HeatPort_a[iCom.N_cv] | heat (from HeatTransferBasePB2Wall) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| TransiEnt.Storage.Heat.PackedBedStorage_L4.Basics.Records.IComPackedBedControlVolume_L4 | iCom (from HeatTransferBasePB2Wall) | ||
| TransiEnt.Storage.Heat.PackedBedStorage_L4.Basics.PackedBedGeometry.PackedBedGeometry_N_cv | geo (from HeatTransferBasePB2Wall) | ||
| SI.CoefficientOfHeatTransfer[iCom.N_cv] | alpha (from HeatTransferBasePB2Wall) | Heat transfer coefficient | |
| SI.CoefficientOfHeatTransfer[iCom.N_cv] | alpha_rad | Heat transfer coefficient | |
| SI.CoefficientOfHeatTransfer[iCom.N_cv] | alpha_wp | Heat transfer coefficient | |
| SI.MassFlowRate[iCom.N_cv + 1] | m_flow | Mass flow rate |