Buildings.Fluid.Boilers.Examples

Information

This package contains examples for the use of models that can be found in Buildings.Fluid.Boilers.

Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).

Package Content

Name	Description
BoilerPolynomial	Test model

Buildings.Fluid.Boilers.Examples.BoilerPolynomial

Information

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"
  extends Modelica.Icons.Example;
 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";
  Buildings.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";
  Buildings.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;