Buildings.Fluid.Boilers.Examples

Information

Extends from Buildings.BaseClasses.BaseIconExamples (Icon for Examples packages).

Package Content

Name	Description
BoilerPolynomial	Test model

Buildings.Fluid.Boilers.Examples.BoilerPolynomial

Parameters

Type	Name	Default	Description
Power	Q_flow_nominal	3000	Nominal power [W]
Temperature	dT_nominal	20	Nominal temperature difference [K]
MassFlowRate	m_flow_nominal	Q_flow_nominal/dT_nominal/4200	Nominal mass flow rate [kg/s]
Pressure	dp_nominal	3000	Pressure drop at m_flow_nominal [Pa]

Modelica definition

model BoilerPolynomial "Test model"
 package Medium = Buildings.Media.ConstantPropertyLiquidWater "Medium model";
 parameter Modelica.SIunits.Power Q_flow_nominal = 3000 "Nominal power";
 parameter Modelica.SIunits.Temperature dT_nominal = 20 
    "Nominal temperature difference";
 parameter Modelica.SIunits.MassFlowRate m_flow_nominal = Q_flow_nominal/dT_nominal/4200 
    "Nominal mass flow rate";
 parameter Modelica.SIunits.Pressure dp_nominal = 3000 
    "Pressure drop at m_flow_nominal";
  inner Modelica.Fluid.System system;

  Buildings.Fluid.Sources.Boundary_pT sin(
    redeclare package Medium = Medium,
    nPorts=2,
    p(displayUnit="Pa") = 300000,
    T=333.15) "Sink";
  Buildings.Fluid.Sources.Boundary_pT sou(
    nPorts=2,
    redeclare package Medium = Medium,
    p=300000 + dp_nominal,
    T=303.15);
  Modelica.Blocks.Sources.TimeTable y(table=[0,0; 1800,1; 1800,0; 2400,0; 2400,
        1; 3600,1]);
  Buildings.Fluid.Boilers.BoilerPolynomial fur1(
    a={0.9},
    effCur=Buildings.Fluid.Types.EfficiencyCurves.Constant,
    Q_flow_nominal=Q_flow_nominal,
    dT_nominal=dT_nominal,
    redeclare package Medium = Medium,
    dp_nominal=dp_nominal,
    T_start=293.15) "Boiler";
  Modelica.Thermal.HeatTransfer.Sources.FixedTemperature TAmb1(
                                                              T=288.15) 
    "Ambient temperature in boiler room";
  Buildings.Fluid.Boilers.BoilerPolynomial fur2(
    a={0.9},
    effCur=Buildings.Fluid.Types.EfficiencyCurves.Constant,
    Q_flow_nominal=Q_flow_nominal,
    dT_nominal=dT_nominal,
    redeclare package Medium = Medium,
    energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState,
    massDynamics=Modelica.Fluid.Types.Dynamics.SteadyState,
    dp_nominal=dp_nominal,
    T_start=293.15) "Boiler";
  Modelica.Thermal.HeatTransfer.Sources.FixedTemperature TAmb2(
                                                              T=288.15) 
    "Ambient temperature in boiler room";
  Modelica.Blocks.Continuous.FirstOrder firstOrder(T=0.1);
equation 
  connect(TAmb1.port, fur1.heatPort);
  connect(TAmb2.port, fur2.heatPort);
  connect(sou.ports[1], fur1.port_a);
  connect(sou.ports[2], fur2.port_a);
  connect(y.y, firstOrder.u);
  connect(firstOrder.y, fur1.y);
  connect(firstOrder.y, fur2.y);
  connect(fur2.port_b, sin.ports[2]);
  connect(fur1.port_b, sin.ports[1]);
end BoilerPolynomial;