modelBaseModule

Extends from Buildings.Fluid.Interfaces.TwoPortFlowResistanceParameters (Parameters for flow resistance for models with two ports).

Parameters

TypeNameDefaultDescription
IntegernSpl1Number of splitters between port_a1 and port_b1
IntegernSpl2Number of splitters between port_a2 and port_b2
Flow resistance
BooleancomputeFlowResistance (from TwoPortFlowResistanceParameters)true=true, compute flow resistance. Set to false to assume no friction
Booleanfrom_dp (from TwoPortFlowResistanceParameters)false= true, use m_flow = f(dp) else dp = f(m_flow)
BooleanlinearizeFlowResistance (from TwoPortFlowResistanceParameters)false= true, use linear relation between m_flow and dp for any flow rate
RealdeltaM (from TwoPortFlowResistanceParameters)0.1Fraction of nominal flow rate where flow transitions to laminar
Nominal condition
Modelica.Units.SI.PressureDifferencedp_nominal (from TwoPortFlowResistanceParameters)Pressure difference
Dynamics › Equations
Modelica.Fluid.Types.DynamicsenergyDynamicsModelica.Fluid.Types.Dynamics.DynamicFreeInitialType of energy balance: dynamic (3 initialization options) or steady state
Dynamics › Nominal condition
Modelica.SIunits.Timetau10Time constant at nominal flow for dynamic energy and momentum balance
Initialization › Side 1
Medium.AbsolutePressurep_start_1Medium.p_defaultStart value of pressure
Medium.TemperatureT_start_1Medium.T_defaultStart value of temperature
Medium.MassFraction[Medium.nX]X_start_1Medium.X_defaultStart value of mass fractions m_i/m
Medium.ExtraProperty[Medium.nC]C_start_1fill(0, Medium.nC)Start value of trace substances
Medium.ExtraProperty[Medium.nC]C_nominal_1fill(1E-2, Medium.nC)Nominal value of trace substances. (Set to typical order of magnitude.)
Initialization › Side 2
Medium.AbsolutePressurep_start_2Medium.p_defaultStart value of pressure
Medium.TemperatureT_start_2Medium.T_defaultStart value of temperature
Medium.MassFraction[Medium.nX]X_start_2Medium.X_defaultStart value of mass fractions m_i/m
Medium.ExtraProperty[Medium.nC]C_start_2fill(0, Medium.nC)Start value of trace substances
Medium.ExtraProperty[Medium.nC]C_nominal_2fill(1E-2, Medium.nC)Nominal value of trace substances. (Set to typical order of magnitude.)

Connectors

TypeNameDefaultDescription
Modelica.Fluid.Interfaces.FluidPort_aport_a1Fluid connector a1 (positive design flow direction is from port_a1 to port_b1)
Modelica.Fluid.Interfaces.FluidPort_bport_b1Fluid connector b1 (positive design flow direction is from port_a1 to port_b1)
Modelica.Fluid.Interfaces.FluidPort_aport_a2Fluid connector a2 (positive design flow direction is from port_a2 to port_b2)
Modelica.Fluid.Interfaces.FluidPort_bport_b2Fluid connector b2 (positive design flow direction is from port_a2 to port_b2)

Components

TypeNameDefaultDescription
Buildings.Fluid.FixedResistances.Junctionspl2
Buildings.Fluid.FixedResistances.Junctionspl1

Contents

NameDescription
MediumMedium in the component