modelHxRec_06122013

Parameters

TypeNameDefaultDescription
IntegerN5Number of cells
Modelica.SIunits.AreaA16.18Lenght of the tube
Modelica.SIunits.VolumeV0.03781Heat exchanger internal volume, cold fluid side
Modelica.SIunits.MassM_wall69Wall mass
Modelica.SIunits.SpecificHeatCapacityc_wall503Specific heat capacity of the metal
Modelica.SIunits.MassFlowRateMdotnom0.2588Nominal fluid flow rate
Modelica.SIunits.CoefficientOfHeatTransferUnom100Heat transfer coefficient for the hot and cold side
Initialization
Modelica.SIunits.TemperatureTstart_wall_left344.15Wall temperature start value - first node
Modelica.SIunits.TemperatureTstart_wall_right312.67Wall temperature start value - last node
Modelica.SIunits.Temperature[N]Tstart_walllinspace(Tstart_wall_left, Tstart_wall_right, N)Start value of temperature vector (initialized by default)
Modelica.SIunits.SpecificEnthalpyhstart_left400000Inlet working fluid enthalpy start value
Modelica.SIunits.SpecificEnthalpyhstart_right250000Outlet enthalpy start value
Modelica.SIunits.Pressurepstart_h1.54883e5Hot fluid pressure start value
Modelica.SIunits.TemperatureTstart_wf_h_left353.82Hot fluid temperature start value - first node
Modelica.SIunits.TemperatureTstart_wf_h_right316.91Hot fluid temperature start value - last node
Modelica.SIunits.Temperature[N]Tstart_wf_hlinspace(Tstart_wf_h_left, Tstart_wf_h_right, N)Start value of temperature vector (initialized by default)
Modelica.SIunits.SpecificEnthalpy[N]hstart_hlinspace(hstart_left, hstart_right, N)Start value of enthalpy vector (initialized by default)
Modelica.SIunits.Pressurepstart_c23.57e5Cold fluid pressure start value
Modelica.SIunits.TemperatureTstart_wf_c_left334.78Cold fluid temperature start value - first node
Modelica.SIunits.TemperatureTstart_wf_c_right308.43Cold fluid temperature start value - last node
Modelica.SIunits.Temperature[N]Tstart_wf_clinspace(Tstart_wf_c_left, Tstart_wf_c_right, N)Start value of temperature vector (initialized by default)
Modelica.SIunits.SpecificEnthalpy[N]hstart_clinspace(hstart_left, hstart_right, N)Start value of enthalpy vector (initialized by default)
Numerical options
BooleanMdotconstfalseSet to yes to assume constant mass flow rate at each node (easier convergence)
Booleanmax_derfalseSet to yes to limit the density derivative during phase transitions
Booleanaverage_TcelltrueSet to yes to impose the cell enthalpy as the average of the surrounding nodes enthalpies
Booleanfilter_dMdtfalseSet to yes to filter dMdt with a first-order filter
Realmax_drhodt100Maximum value for the density derivative
Modelica.SIunits.TimeTT1Integration time of the first-order filter
Initialization › Intialization options
Booleansteadystate_htrueif true, sets the derivative of h (working fluids enthalpy in each cell) to zero during Initialization
Booleansteadystate_T_walltrueif true, sets the derivative of T_wall to zero during Initialization

Connectors

TypeNameDefaultDescription
Interfaces.Fluid.FlangeAinletHot
Interfaces.Fluid.FlangeBoutletHot
Interfaces.Fluid.FlangeAinletCold
Interfaces.Fluid.FlangeBoutletCold

Components

TypeNameDefaultDescription
Modelica.SIunits.VolumeViV/N
Modelica.SIunits.AreaAiA/N
MediumHot.ThermodynamicState[N]fluidStateHot
MediumHot.AbsolutePressurep_h
Modelica.SIunits.MassFlowRateM_dot_su_h
MediumHot.SpecificEnthalpy[N]h_hFluid specific enthalpy at the nodes
MediumHot.Temperature[N]T_hFluid temperature
MediumHot.Density[N]rho_hFluid cell density
Modelica.SIunits.DerDensityByEnthalpy[N]drdh_hDerivative of density by enthalpy
Modelica.SIunits.DerDensityByPressure[N]drdp_hDerivative of density by pressure
Modelica.SIunits.SpecificEnthalpy[N + 1]hnode_hEnthalpy state variables
Real[N]dMdt_hTime derivative of mass in each cell between two nodes
Modelica.SIunits.HeatFlux[N]qdot_wf_hAverage heat flux
Modelica.SIunits.MassFlowRate[N + 1]Mdot_h
Modelica.SIunits.Temperature[N]T_wallCell temperatures
MediumCold.ThermodynamicState[N]fluidStateCold
MediumCold.AbsolutePressurep_c
Modelica.SIunits.MassFlowRateM_dot_su_c
MediumCold.SpecificEnthalpy[N]h_cFluid specific enthalpy at the nodes
MediumCold.Temperature[N]T_cFluid temperature
MediumCold.Density[N]rho_cFluid cell density
Modelica.SIunits.DerDensityByEnthalpy[N]drdh_cDerivative of density by enthalpy
Modelica.SIunits.DerDensityByPressure[N]drdp_cDerivative of density by pressure
Modelica.SIunits.SpecificEnthalpy[N + 1]hnode_cEnthalpy state variables
Real[N]dMdt_cTime derivative of mass in each cell between two nodes
Modelica.SIunits.HeatFlux[N]qdot_wf_cAverage heat flux
Modelica.SIunits.MassFlowRate[N + 1]Mdot_c

Contents

NameDescription
MediumHot
MediumCold