modelHeatConvPipeInside

Model for Heat Transfer through convection inside a pipe, based on Nussel Correlations
Diagram of HeatConvPipeInsideOpen the diagram
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Extends from AixLib.Obsolete.BaseClasses.ObsoleteModel (Icon for classes that are obsolete and will be removed in later versions), Modelica.Thermal.HeatTransfer.Interfaces.Element1D (Partial heat transfer element with two HeatPort connectors that does not store energy).

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.

  • August 11, 2017; by David Jansen:

Parameters

TypeNameDefaultDescription
Modelica.Units.SI.Lengthlengthlength of total pipe
Modelica.Units.SI.Lengthd_iinner diameter of pipe
Modelica.Units.SI.Lengthd_aouter diameter of pipe
Modelica.Units.SI.AreaA_sursurface for heat transfer
BooleancalcHContrueUse calculated value for inside heat coefficient
Modelica.Units.SI.CoefficientOfHeatTransferhConIn_const30Constant convective heat transfer coefficient (Inside)
Obsolete.YearIndependent.FastHVAC.Media.BaseClasses.MediumSimplemediumObsolete.YearIndependent.FastHVAC.Media.WaterSimple()

Connectors

TypeNameDefaultDescription
HeatPort_aport_a (from Element1D)
HeatPort_bport_b (from Element1D)
Modelica.Blocks.Interfaces.RealInputm_flow

Components

TypeNameDefaultDescription
SI.HeatFlowRateQ_flow (from Element1D)Heat flow rate from port_a -> port_b
SI.TemperatureDifferencedT (from Element1D)port_a.T - port_b.T
Modelica.Units.SI.ReynoldsNumberRe
Modelica.Units.SI.Velocityv
Modelica.Units.SI.NusseltNumberNu
Modelica.Units.SI.NusseltNumberNu_lam_1
Modelica.Units.SI.NusseltNumberNu_lam_2
Modelica.Units.SI.NusseltNumberNu_lam
Modelica.Units.SI.NusseltNumberNu_tur
Modelica.Units.SI.PrandtlNumberPr
Modelica.Units.SI.CoefficientOfHeatTransferhConConvective heat transfer coefficient
Realzetapressure loss coefficient