PartialFlowHeatTransfer

base class for any pipe heat transfer correlation

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

Base class for heat transfer models of flow devices.

The geometry is specified in the interface with the surfaceAreas[n], the roughnesses[n] and the lengths[n] along the flow path. Moreover the fluid flow is characterized for different types of devices by the characteristic dimensions[n+1] and the average velocities vs[n+1] of fluid flow. See Pipes.BaseClasses.CharacteristicNumbers.ReynoldsNumber for example definitions.

Parameters (5)

n	Value: 1 Type: Integer Description: Number of heat transfer segments
use_k	Value: false Type: Boolean Description: = true to use k value for thermal isolation
k	Value: 0 Type: CoefficientOfHeatTransfer (W/(m²·K)) Description: Heat transfer coefficient to ambient
T_ambient	Value: system.T_ambient Type: Temperature (K) Description: Ambient temperature
nParallel	Value: Type: Real Description: number of identical parallel flow devices

Inputs (6)

states	Type: ThermodynamicState[n] Description: Thermodynamic states of flow segments
surfaceAreas	Type: Area[n] (m²) Description: Heat transfer areas
vs	Type: Velocity[n] (m/s) Description: Mean velocities of fluid flow in segments
lengths	Type: Length[n] (m) Description: Lengths along flow path
dimensions	Type: Length[n] (m) Description: Characteristic dimensions for fluid flow (diameter for pipe flow)
roughnesses	Type: Roughness[n] (m) Description: Average heights of surface asperities