modelHeatConvPipeInsideDynamic
Dynamic model for Heat Transfer through convection inside a pipe, based on Nussel Correlations
Extends from Modelica.Thermal.HeatTransfer.Interfaces.Element1D.
Information
Overview
This model represents the phenomenon of heat convection inside a pipe by a flowing medium.
The heat transfer coefficient at the inside could be calculated by formular from VDI-Waermeatlas or a fixed value can be choosen.
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August 11, 2017; by David Jansen:
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.Length | length | 1 | Length of total pipe |
| Modelica.Units.SI.Length | d_i | 0.02 | Inner diameter of exhaust pipe |
| Modelica.Units.SI.Area | A_sur | 2 | Surface for heat transfer |
| Boolean | calculateHConv | true | Use calculated value for inside heat coefficient |
| Modelica.Units.SI.CoefficientOfHeatTransfer | hConvInsideFix | 30 |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.MassFlowRate | m_flow | Mass flow rate of gas | |
| Modelica.Units.SI.SpecificHeatCapacity | c | Heat capacity of considered medium | |
| Modelica.Units.SI.Density | rho | Density of considered medium | |
| Modelica.Units.SI.ThermalConductivity | lambda | Thermal conductivity of considered medium | |
| Modelica.Units.SI.DynamicViscosity | eta | Dynamic viscosity of considered medium | |
| Modelica.Units.SI.ReynoldsNumber | Re | ||
| Modelica.Units.SI.Velocity | v | ||
| Modelica.Units.SI.NusseltNumber | Nu | ||
| Modelica.Units.SI.NusseltNumber | Nu_lam_1 | ||
| Modelica.Units.SI.NusseltNumber | Nu_lam_2 | ||
| Modelica.Units.SI.NusseltNumber | Nu_lam | ||
| Modelica.Units.SI.NusseltNumber | Nu_tur | ||
| Modelica.Units.SI.PrandtlNumber | Pr | ||
| Modelica.Units.SI.CoefficientOfHeatTransfer | alpha | ||
| Real | zeta | pressure loss coefficient |