modelPipe

Model of a pipe with finite volume discretization along the flow path

Extends from Buildings.Fluid.Interfaces.LumpedVolumeDeclarations, Buildings.Fluid.Interfaces.PartialTwoPortInterface, Buildings.Fluid.Interfaces.TwoPortFlowResistanceParameters.

Information

Model of a pipe with flow resistance and optional heat storage. This model can be used for modeling the heat exchange between the pipe and environment. The model consists of a flow resistance Buildings.Fluid.FixedResistances.PressureDrop and nSeg mixing volumes Buildings.Fluid.MixingVolumes.MixingVolume.

Parameters

Type	Name	Default	Description
Boolean	homotopyInitialization	true	= true, use homotopy method
Integer	nSeg	10	Number of volume segments
Modelica.Units.SI.Length	thicknessIns		Thickness of insulation
Modelica.Units.SI.ThermalConductivity	lambdaIns		Heat conductivity of insulation
Modelica.Units.SI.Length	diameter		Pipe diameter (without insulation)
Modelica.Units.SI.Length	length		Length of the pipe
Flow resistance
Real	ReC	4000	Reynolds number where transition to turbulence starts

Components

Type	Name	Default	Description
Buildings.Fluid.FixedResistances.PressureDrop	preDro		Flow resistance
Buildings.Fluid.MixingVolumes.BaseClasses.MixingVolumeHeatPort	vol		Volume for pipe fluid

Revisions

April 14, 2020, by Michael Wetter:
Changed homotopyInitialization to a constant.
This is for IBPSA, #1341.
February 5, 2015, by Michael Wetter:
Renamed res to preDro for #292.
October 10, 2014, by Michael Wetter:
Changed minimum attribute for nSeg from 2 to 1. This is required for the radiant slab model.
October 8, 2013, by Michael Wetter:
Removed parameter show_V_flow.
September 13, 2013 by Michael Wetter:
Replaced nominal with default values as they are computed using the default Medium values.
February 15, 2012 by Michael Wetter:
Changed base class from which the model extends. Propagated parameters of volume to the top if this model.
February 12, 2012 by Wangda Zuo:
First implementation.