modelThermalInsulation_dynamic_3ways_2layer
Thermal Insulation - dynamic - 3 ways - 2 layer
Extends from ClaRa.Basics.Icons.WallThick, TransiEnt.Components.Heat.ThermalInsulation.Basics.ThermalInsulation_base (Partial Model for thermal Insulation).
Information
1. Purpose of model
Model for thermal insulation to the environment with dynamic heat transfer, 3 heat flow path(top, sides and bottom) and 2 material layer are considered.
2. Level of detail, physical effects considered, and physical insight
- L4 discretization in axial direction
- lateral dynamic heat transfer
- axial heat conduction inside thermal insulation
3. Limits of validity
- constant thickness in axial direction
- constant insulation surface in lateral direction
- constant temperature at start in axial direction, but can depend on lateral position
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
(none)
10. Version History
Model created by Michael von der Heyde (heyde@tuhh.de) for the Research Project "Future Energy Solution" (FES), 2020
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Fundamental Definitions | |||
| Integer | N_cv (from ThermalInsulation_base) | 10 | Number of axial control volumes |
| Geometry | |||
| Integer | N_iso (from ThermalInsulation_base) | 3 | Number of lateral insulation discretisation for each layer |
| SI.Length | length (from ThermalInsulation_base) | 1 | Length of Insulation |
| SI.Length | circumference (from ThermalInsulation_base) | 1 | Circumference of Insulation |
| SI.Length | thickness_top_L1 | 1 | Thickness of Insulation |
| SI.Length | thickness_top_L2 | 1 | Thickness of Insulation |
| SI.Length | thickness_sides_L1 | 1 | Thickness of Insulation |
| SI.Length | thickness_sides_L2 | 1 | Thickness of Insulation |
| SI.Length | thickness_bottom_L1 | 1 | Thickness of Insulation |
| SI.Length | thickness_bottom_L2 | 1 | Thickness of Insulation |
| Real | topPart | 1/3 | Relative partition of top Insulation |
| Real | sidesPart | 1/3 | Relative partition of sides Insulation |
| Real | bottomPart | 1/3 | Relative partition of bottom Insulation |
| Heat Transfer | |||
| SI.CoefficientOfHeatTransfer | alpha_iso2ambient_top | 20 | Top Insulation Surface to Air Heat Transfer Coefficient |
| SI.CoefficientOfHeatTransfer | alpha_iso2ambient_sides | 20 | Sides Insulation Surface to Air Heat Transfer Coefficient |
| Boolean | useAxialHeatConduction | false | True, if axial heat conduction through a wall shall be considered |
| Initialization | |||
| SI.Temperature | T_start_top | ones(2*N_iso)*simCenter.T_amb_start | |
| SI.Temperature | T_start_sides | ones(2*N_iso)*simCenter.T_amb_start | |
| SI.Temperature | T_start_bottom | ones(2*N_iso)*simCenter.T_amb_start | |
| SI.Temperature | T_earth | simCenter.T_amb_start | Bottom Temperature |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| ClaRa.Basics.Interfaces.HeatPort_a | heat (from ThermalInsulation_base) |
Components
Contents
| Name | Description |
|---|---|
| medium_top_L1 | |
| medium_top_L2 | |
| medium_sides_L1 | |
| medium_sides_L2 | |
| medium_bottom_L1 | |
| medium_bottom_L2 |