modelConstant

Constant: Constant heat transfer coefficient

Extends from Greenhouses.Flows.FluidFlow.HeatTransfer.BaseClasses.PartialSinglePhaseCorrelation (Base class for single-phase heat transfer correlations), Greenhouses.Flows.FluidFlow.HeatTransfer.BaseClasses.PartialPipeCorrelation (Base class for heat transfer correlations for pipe flow), Greenhouses.Flows.FluidFlow.HeatTransfer.BaseClasses.PartialPlateHeatExchangerCorrelation (Base class for heat transfer correlations for plate heat exchangers).

Information

The model Constant extends the partial model PartialSinglePhaseCorrelation and defines a constant heat transfer coefficient.

Parameters

TypeNameDefaultDescription
Modelica.Units.SI.CoefficientOfHeatTransferU_c1000Heat transfer coefficient
Geometry
Modelica.Units.SI.Lengthd_h (from PartialPipeCorrelation)Hydraulic diameter
Modelica.Units.SI.Lengtha_hat (from PartialPlateHeatExchangerCorrelation)0.002Corrugation amplitude
Modelica.Units.SI.Anglephi (from PartialPlateHeatExchangerCorrelation)Modelica.Units.Conversions.from_deg(45)Corrugation angle
Modelica.Units.SI.LengthLambda (from PartialPlateHeatExchangerCorrelation)0.0126Corrugation wavelength
Modelica.Units.SI.LengthB_p (from PartialPlateHeatExchangerCorrelation)0.1Plate flow width
Advanced geometry
Modelica.Units.SI.AreaA_cro (from PartialPipeCorrelation)Modelica.Constants.pi*d_h^2/4Cross-sectional area
RealX (from PartialPlateHeatExchangerCorrelation)2*Modelica.Constants.pi*a_hat/LambdaWave number
RealPhi (from PartialPlateHeatExchangerCorrelation)1/6*(1 + sqrt(1 + X^2) + 4*sqrt(1 + X^2/2))Enhancement factor

Components

TypeNameDefaultDescription
Modelica.Units.SI.MassFlowRatem_dot (from PartialHeatTransferCorrelation)Inlet massflow
Modelica.Units.SI.HeatFluxq_dot (from PartialHeatTransferCorrelation)Heat flow rate per area [W/m2]
Modelica.Units.SI.CoefficientOfHeatTransferU (from PartialHeatTransferCorrelation)
Medium.ThermodynamicStatestate (from PartialSinglePhaseCorrelation)Thermodynamic state
Modelica.Units.SI.CoefficientOfHeatTransferalpha (from PartialPlateHeatExchangerCorrelation)The calculated HTC