modelBuoyancy
Model to add buoyancy if there is a temperature inversion in the tank
Information
1. Purpose of model
Adds Buoyancy to a stratified storage.
2. Level of detail, physical effects considered, and physical insight
Convective energy flow is considered as heat flow of the same amount.
3. Limits of validity
Purely technical component without physical modeling.
4. Interfaces
heatPort[nseg]: Gets the temperatures from the temperature layers and returns the heat flow due to boyancy back
5. Nomenclature
The input parameters
6. Governing Equations
(no equations)
7. Remarks for Usage
This model should be used to add buoyancy to a one dimensional water storage model.
8. Validation
9. References
Building Library
10. Version History
Model created by Tobias Ramm (tobias.ramm@tuhh.de) on Fri Mar 20 2015
Revised and edited by Lisa Andresen (andresen@tuhh.de), Jun 2015
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.Volume | V | Volume of tank | |
| Integer | nSeg | 2 | Number of volume segments |
| Modelica.Units.SI.Time | tau | Time constant for mixing | |
| Modelica.Units.SI.Density | rho_default | 998 | Density, used to compute fluid mass |
| Modelica.Units.SI.SpecificHeatCapacity | cp_default | 4200 | Specific heat capacity |
| Fundamental Definitions | |||
| TILMedia.VLEFluidTypes.BaseVLEFluid | medium | simCenter.fluid1 | Medium in the component |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_a | heatPort | Heat input into the volumes |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| ClaRa.SimCenter | simCenter | ||
| Modelica.Units.SI.HeatFlowRate | Q_flow | Heat flow rate from segment i+1 to i |