modelFlowDependentThermalConductance

Flow-dependent global thermal conductance UA = UAnom*(w/wnom)^alpha
Diagram of FlowDependentThermalConductance

Extends from FlowDependentHeatTransferCoefficient (Flow-dependent h.t.c. gamma = gamma_nom*(w/wnom)^alpha).

Information

Same as FlowDependentHeatTransferCoefficient, except that the global nominal thermal conductance UAnom is given instead of the nominal specific heat transfer coefficient.

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_nom (from FlowDependentHeatTransferCoefficient)Nominal heat transfer coefficient
SI.PerUnitalpha (from FlowDependentHeatTransferCoefficient)Exponent in the flow-dependency law
SI.PerUnitbeta (from FlowDependentHeatTransferCoefficient)0.1Fraction of nominal flow rate below which the heat transfer is not reduced
SI.MassFlowRatewnom_ht (from FlowDependentHeatTransferCoefficient)wnomNominal flow rate for heat transfer correlation (single tube)
BooleanadaptiveAverageTemperature (from FlowDependentHeatTransferCoefficient)trueAdapt the average temperature at low flow rates
Modelica.SIunits.PerUnitsigma (from FlowDependentHeatTransferCoefficient)0.1Fraction of nominal flow rate below which the heat transfer is computed on outlet volume temperatures
BooleanuseHomotopy (from FlowDependentHeatTransferCoefficient)trueuse nominal heat transfer coefficient for simplified model
SI.ThermalConductanceUAnomNominal global thermal conductance (UA value), for Nt tubes
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
Medium.Temperature[Nw]Tvol (from FlowDependentHeatTransferCoefficient)Fluid temperature in the volumes
SI.CoefficientOfHeatTransfergamma (from FlowDependentHeatTransferCoefficient)Actual heat transfer coefficient
SI.PerUnitw_wnom (from FlowDependentHeatTransferCoefficient)Ratio between actual and nominal flow rate
SI.PerUnitw_wnom_reg (from FlowDependentHeatTransferCoefficient)Regularized ratio between actual and nominal flow rate
SI.ThermalConductanceUAgamma*omega*L*Nt