modelPartialPipeFlowHeatTransfer
Base class for pipe heat transfer correlation in terms of Nusselt number heat transfer in a circular pipe for laminar and turbulent one-phase flow
Extends from PartialFlowHeatTransfer (Base class for any pipe heat transfer correlation).
Information
Base class for heat transfer models that are expressed in terms of the Nusselt number and which can be used in distributed pipe models.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.CoefficientOfHeatTransfer | alpha0 | 100 | Guess value for heat transfer coefficients |
| Internal Interface | |||
| Integer | n (from PartialHeatTransfer) | 1 | Number of heat transfer segments |
| Boolean | use_k (from PartialHeatTransfer) | false | = true to use k value for thermal isolation |
| Ambient | |||
| SI.CoefficientOfHeatTransfer | k (from PartialHeatTransfer) | 0 | Heat transfer coefficient to ambient |
| SI.Temperature | T_ambient (from PartialHeatTransfer) | system.T_ambient | Ambient temperature |
| Internal interface › Geometry | |||
| Real | nParallel (from PartialFlowHeatTransfer) | Number of identical parallel flow devices | |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Fluid.Interfaces.HeatPorts_a | heatPorts (from PartialHeatTransfer) | Heat port to component boundary |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Medium.ThermodynamicState | states (from PartialHeatTransfer) | Thermodynamic states of flow segments | |
| SI.Area | surfaceAreas (from PartialHeatTransfer) | Heat transfer areas | |
| SI.HeatFlowRate | Q_flows (from PartialHeatTransfer) | Heat flow rates | |
| Modelica.Fluid.System | system (from PartialHeatTransfer) | System wide properties | |
| Medium.Temperature | Ts (from PartialHeatTransfer) | Medium.temperature(states) | Temperatures defined by fluid states |
| SI.Velocity | vs (from PartialFlowHeatTransfer) | Mean velocities of fluid flow in segments | |
| SI.Length | lengths (from PartialFlowHeatTransfer) | Lengths along flow path | |
| SI.Length | dimensions (from PartialFlowHeatTransfer) | Characteristic dimensions for fluid flow (diameter for pipe flow) | |
| Modelica.Fluid.Types.Roughness | roughnesses (from PartialFlowHeatTransfer) | Average heights of surface asperities | |
| SI.CoefficientOfHeatTransfer | alphas | Heat transfer coefficient | |
| Real | Res | Reynolds numbers | |
| Real | Prs | Prandtl numbers | |
| Real | Nus | Nusselt numbers | |
| Medium.Density | ds | Densities | |
| Medium.DynamicViscosity | mus | Dynamic viscosities | |
| Medium.ThermalConductivity | lambdas | Thermal conductivity | |
| SI.Length | diameters | dimensions | Hydraulic diameters for pipe flow |