Modelica.Fluid.Examples.HeatExchanger

Information

Package Content

Name	Description
HeatExchangerSimulation	simulation for the heat exchanger model
BaseClasses	Additional models for heat exchangers

Modelica.Fluid.Examples.HeatExchanger.HeatExchangerSimulation

Information

Extends from Modelica.Icons.Example (Icon for runnable examples).

Parameters

Type	Name	Default	Description
replaceable package Medium		Modelica.Media.Water.Constan...

Connectors

Type	Name	Description
replaceable package Medium

Modelica definition

model HeatExchangerSimulation 
  "simulation for the heat exchanger model"

extends Modelica.Icons.Example;

replaceable package Medium =
      Modelica.Media.Water.ConstantPropertyLiquidWater;
//replaceable package Medium = Modelica.Media.Water.StandardWater;
//package Medium = Modelica.Media.Incompressible.Examples.Essotherm650;
  Modelica.Fluid.Examples.HeatExchanger.BaseClasses.BasicHX HEX(
    c_wall=500,
    use_T_start=true,
    nNodes=20,
    length=2,
    m_flow_start_1=0.2,
    m_flow_start_2=0.2,
    k_wall=100,
    energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
    massDynamics=Modelica.Fluid.Types.Dynamics.SteadyStateInitial,
    s_wall=0.005,
    crossArea_1=4.5e-4,
    crossArea_2=4.5e-4,
    perimeter_1=0.075,
    perimeter_2=0.075,
    area_h_1=0.075*2*20,
    area_h_2=0.075*2*20,
    rho_wall=900,
    redeclare package Medium_1 =
        Medium,
    redeclare package Medium_2 =
        Medium,
    redeclare model HeatTransfer_1 =
        Modelica.Fluid.Pipes.BaseClasses.HeatTransfer.ConstantFlowHeatTransfer
        (                                                                   alpha0=
           1000),
    redeclare model HeatTransfer_2 =
        Modelica.Fluid.Pipes.BaseClasses.HeatTransfer.ConstantFlowHeatTransfer
        (alpha0=200),
    Twall_start=300,
    dT=10,
    T_start_1=304,
    T_start_2=300);

  Modelica.Fluid.Sources.Boundary_pT ambient2(nPorts=1,
    p=1e5,
    T=280,
    redeclare package Medium = Medium);
  Modelica.Fluid.Sources.Boundary_pT ambient1(nPorts=1,
    p=1e5,
    T=300,
    redeclare package Medium = Medium);
  Modelica.Fluid.Sources.MassFlowSource_T massFlowRate2(nPorts=1,
    m_flow=0.2,
    T=360,
    redeclare package Medium = Medium,
    use_m_flow_in=true,
    use_T_in=false,
    use_X_in=false);
  Modelica.Fluid.Sources.MassFlowSource_T massFlowRate1(nPorts=1,
    T=300,
    m_flow=0.5,
    redeclare package Medium = Medium);
  Modelica.Blocks.Sources.Ramp Ramp1(
    startTime=50,
    duration=5,
    height=-1,
    offset=0.5);
  inner Modelica.Fluid.System system;
equation 
  connect(massFlowRate1.ports[1], HEX.port_a1);
  connect(HEX.port_b1, ambient1.ports[1]);
  connect(Ramp1.y, massFlowRate2.m_flow_in);
  connect(massFlowRate2.ports[1], HEX.port_b2);
  connect(HEX.port_a2, ambient2.ports[1]);
end HeatExchangerSimulation;