Modelica.Fluid.Examples.DrumBoiler

Drum boiler example, see Franke, Rode, Krueger: On-line Optimization of Drum Boiler Startup, 3rd International Modelica Conference, Linkoping, 2003

Package Content

NameDescription
Modelica.Fluid.Examples.DrumBoiler.DrumBoiler DrumBoiler Complete drum boiler model, including evaporator and supplementary components
Modelica.Fluid.Examples.DrumBoiler.BaseClasses BaseClasses Additional components for drum boiler example


Modelica.Fluid.Examples.DrumBoiler.DrumBoiler Modelica.Fluid.Examples.DrumBoiler.DrumBoiler

Complete drum boiler model, including evaporator and supplementary components

Modelica.Fluid.Examples.DrumBoiler.DrumBoiler

Information


Extends from Modelica.Icons.Example (Icon for an example model).

Connectors

TypeNameDescription
output RealOutputT_S 
output RealOutputp_S 
output RealOutputqm_S 
output RealOutputV_l 

Modelica definition

model DrumBoiler 
  "Complete drum boiler model, including evaporator and supplementary components"
   extends Modelica.Icons.Example;
  import Modelica.SIunits.Conversions.*;

  Modelica.Fluid.Examples.DrumBoiler.BaseClasses.EquilibriumDrumBoiler
    evaporator(
    m_D=300e3,
    cp_D=500,
    V_t=100,
    V_l_start=67,
    redeclare package Medium = Modelica.Media.Water.StandardWater,
    energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
    massDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
    p_start=100000);
  Modelica.Thermal.HeatTransfer.Sources.PrescribedHeatFlow furnace;
  Modelica.Fluid.Sources.FixedBoundary sink(nPorts=1, p=from_bar(0.5),
    redeclare package Medium = Modelica.Media.Water.StandardWaterOnePhase,
    T=500);
  Modelica.Fluid.Sensors.MassFlowRate massFlowRate(           redeclare package
      Medium = 
        Modelica.Media.Water.StandardWater);
  Modelica.Fluid.Sensors.Temperature temperature(    redeclare package Medium
      = Modelica.Media.Water.StandardWater);
  Modelica.Fluid.Sensors.Pressure pressure(           redeclare package Medium
      = Modelica.Media.Water.StandardWater);
  Modelica.Blocks.Continuous.PI controller(T=120, k=10);
  Modelica.Fluid.Sources.MassFlowSource_h pump(nPorts=1,
                                           h=5e5, redeclare package Medium = 
        Modelica.Media.Water.StandardWater,
    use_m_flow_in=true);
  Modelica.Blocks.Math.Feedback feedback;
  Modelica.Blocks.Sources.Constant levelSetPoint(k=67);
  Modelica.Blocks.Interfaces.RealOutput T_S;
  Modelica.Blocks.Interfaces.RealOutput p_S;
  Modelica.Blocks.Interfaces.RealOutput qm_S;
  Modelica.Blocks.Interfaces.RealOutput V_l;
public 
  Modelica.Blocks.Math.Gain MW2W(k=1e6);
  Modelica.Blocks.Math.Gain Pa2bar(k=1e-5);
  Modelica.Thermal.HeatTransfer.Celsius.FromKelvin K2degC;
  Modelica.Blocks.Nonlinear.Limiter limiter(uMin=0, uMax=500);
  Modelica.Fluid.Valves.ValveLinear SteamValve(                  redeclare 
      package Medium = 
        Modelica.Media.Water.StandardWater,
    dp_nominal=9000000,
    m_flow_nominal=180);

  inner Modelica.Fluid.System system;
  Modelica.Blocks.Sources.TimeTable q_F_Tab(table=[0, 0; 3600, 400; 7210,
        400]);
  Modelica.Blocks.Sources.TimeTable Y_Valve_Tab(table=[0,0; 900,1; 7210,1]);
equation 
  connect(furnace.port, evaporator.heatPort);
  connect(controller.u,feedback.y);
  connect(feedback.u2,      evaporator.V);
  connect(levelSetPoint.y,feedback.u1);
  connect(massFlowRate.m_flow, qm_S);
  connect(evaporator.V, V_l);
  connect(MW2W.y,furnace.Q_flow);
  connect(pressure.p, Pa2bar.u);
  connect(Pa2bar.y, p_S);
  connect(K2degC.Celsius, T_S);
  connect(controller.y, limiter.u);
  connect(limiter.y, pump.m_flow_in);
  connect(temperature.T, K2degC.Kelvin);
  connect(pressure.port, massFlowRate.port_a);
  connect(pump.ports[1], evaporator.port_a);
  connect(massFlowRate.port_b, SteamValve.port_a);
  connect(SteamValve.port_b, sink.ports[1]);
  connect(evaporator.port_b, massFlowRate.port_a);
  connect(temperature.port, massFlowRate.port_a);
  connect(q_F_Tab.y, MW2W.u);
  connect(Y_Valve_Tab.y, SteamValve.opening);
end DrumBoiler;

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