modelHeatTransfer2phDB

Dittus-Boelter 1-phase, constant h.t.c. 2-phase

Extends from BaseClasses.DistributedHeatTransferFV (Base class for distributed heat transfer models - finite volumes).

Parameters

TypeNameDefaultDescription
BooleanuseAverageTemperature (from DistributedHeatTransferFV)true= true to use average temperature for heat transfer
SI.Lengthl (from DistributedHeatTransferFV)L/(Nw)Length of a single volume
Modelica.SIunits.PerUnitkc (from DistributedHeatTransferFV)1Correction factor for heat transfer
SI.CoefficientOfHeatTransfergamma_b20000Coefficient of heat transfer in the 2-phase region
Set by Flow1D model
IntegerNf (from DistributedHeatTransferFV)2Number of nodes on the fluid side
IntegerNw (from DistributedHeatTransferFV)Nf - 1Number of volumes on the wall side
IntegerNt (from DistributedHeatTransferFV)Number of tubes in parallel
SI.DistanceL (from DistributedHeatTransferFV)Tube length
SI.AreaA (from DistributedHeatTransferFV)Cross-sectional area (single tube)
SI.Lengthomega (from DistributedHeatTransferFV)Wet perimeter of heat transfer surface (single tube)
SI.LengthDhyd (from DistributedHeatTransferFV)Hydraulic Diameter (single tube)
SI.MassFlowRatewnom (from DistributedHeatTransferFV)Nominal mass flow rate (single tube)

Connectors

TypeNameDefaultDescription
ThermoPower.Thermal.DHTVolumeswall (from DistributedHeatTransferFV)

Components

TypeNameDefaultDescription
Medium.ThermodynamicState[Nf]fluidState (from DistributedHeatTransferFV)
Medium.MassFlowRate[Nf]w (from DistributedHeatTransferFV)
Medium.Temperature[Nf]T (from DistributedHeatTransferFV)Temperatures at the fluid side nodes
Medium.Temperature[Nw]Tw (from DistributedHeatTransferFV)Temperatures of the wall volumes
SI.Power[Nw]Qw (from DistributedHeatTransferFV)Heat flows entering from the wall volumes
SI.Power[Nf - 1]Qvol (from DistributedHeatTransferFV)QwHeat flows going to the fluid volumes
SI.PowerQ (from DistributedHeatTransferFV)Total heat flow through lateral boundary
Real[Nw]stateIndicator of phase configuration
SI.PerUnit[Nw]alpha_lNormalized position of liquid phase boundary
SI.PerUnit[Nw]alpha_vNormalized position of vapour phase boundary
SI.CoefficientOfHeatTransfer[Nf]gamma1phHeat transfer coefficient for 1-phase fluid
SI.CoefficientOfHeatTransfergamma_bubbleHeat transfer coefficient for 1-phase fluid at liquid phase boundary
SI.CoefficientOfHeatTransfergamma_dewHeat transfer coefficient for 1-phase fluid at vapour phase boundary
SI.CoefficientOfHeatTransfergamma2phgamma_bHeat transfer coefficient for 2-phase mixture
Medium.SpecificEnthalpy[Nf]hFluid specific enthalpy
Medium.SpecificEnthalpyhlSaturated liquid enthalpy
Medium.SpecificEnthalpyhvSaturated vapour enthalpy
Medium.Temperature[Nw]TvolFluid average temperature in the volumes
Medium.TemperatureTsSaturated water temperature
Medium.SaturationPropertiessatProperties of saturated fluid
Medium.ThermodynamicStatebubbleBubble point, one-phase side
Medium.ThermodynamicStatedewDew point, one-phase side
Medium.AbsolutePressurepFluid pressure for property calculations
Medium.DynamicViscosity[Nf]muDynamic viscosity
Medium.ThermalConductivity[Nf]kThermal conductivity
Medium.SpecificHeatCapacity[Nf]cpHeat capacity at constant pressure
Medium.DynamicViscositymu_bubbleDynamic viscosity at bubble point
Medium.ThermalConductivityk_bubbleThermal conductivity at bubble point
Medium.SpecificHeatCapacitycp_bubbleHeat capacity at constant pressure at bubble point
Medium.DynamicViscositymu_dewDynamic viscosity at dew point
Medium.ThermalConductivityk_dewThermal conductivity at dew point
Medium.SpecificHeatCapacitycp_dewHeat capacity at constant pressure at dew point