Buildings.Fluid.HeatExchangers.CoolingTowers.Examples.BaseClasses

Information

This package contains base classes that are used to construct the models in Buildings.Fluid.HeatExchangers.CoolingTowers.Examples.

Extends from Modelica.Icons.BasesPackage (Icon for packages containing base classes).

Package Content

Name	Description
PartialStaticTwoPortCoolingTower	Base class for test models of cooling towers
PartialStaticTwoPortCoolingTowerWetBulb	Partial test model for cooling tower with wet bulb temperature as potential for heat transfer

Buildings.Fluid.HeatExchangers.CoolingTowers.Examples.BaseClasses.PartialStaticTwoPortCoolingTower

Parameters

Type	Name	Default	Description
FixedApproach	tow	redeclare FixedApproach tow(...	Cooling tower
Nominal condition
MassFlowRate	mWat_flow_nominal	0.15	Design air flow rate [kg/s]

Modelica definition

partial model PartialStaticTwoPortCoolingTower 
  "Base class for test models of cooling towers"

 package Medium_W = Buildings.Media.ConstantPropertyLiquidWater;

  parameter Modelica.SIunits.MassFlowRate mWat_flow_nominal = 0.15 
    "Design air flow rate";

  Modelica.Blocks.Sources.Constant TWat(k=273.15 + 35) "Water temperature";
  replaceable FixedApproach tow(
           redeclare package Medium = Medium_W, m_flow_nominal=mWat_flow_nominal,
    dp_nominal=10) "Cooling tower";
  Buildings.Fluid.Sources.Boundary_pT sin_1(             T=283.15, redeclare 
      package Medium = Medium_W,
    p=101325,
    nPorts=1);
  Buildings.Fluid.Sources.Boundary_pT sou_1(
    redeclare package Medium = Medium_W,
    nPorts=1,
    use_p_in=true,
    use_T_in=true,
    p=101335,
    T=293.15);
    Modelica.Blocks.Sources.Constant PWatIn(k=101335);
  Modelica.Blocks.Sources.Sine TOut(amplitude=10, offset=293.15) 
    "Outside air temperature";
  inner Modelica.Fluid.System system;
equation 
  connect(TWat.y, sou_1.T_in);
  connect(PWatIn.y, sou_1.p_in);
  connect(sou_1.ports[1], tow.port_a);
  connect(tow.port_b, sin_1.ports[1]);
end PartialStaticTwoPortCoolingTower;

Buildings.Fluid.HeatExchangers.CoolingTowers.Examples.BaseClasses.PartialStaticTwoPortCoolingTowerWetBulb

Information

Parameters

Type	Name	Default	Description
Nominal condition
MassFlowRate	mWat_flow_nominal	0.15	Design air flow rate [kg/s]

Connectors

Type	Name	Description
Bus	weaBus

Modelica definition

model PartialStaticTwoPortCoolingTowerWetBulb 
  "Partial test model for cooling tower with wet bulb temperature as potential for heat transfer"
  import Buildings;
  extends PartialStaticTwoPortCoolingTower(redeclare Buildings.Fluid.HeatExchangers.CoolingTowers.FixedApproach
                                                                 tow);
 package Medium_A = Buildings.Media.PerfectGases.MoistAir;
  Buildings.Utilities.Psychrometrics.TWetBul_TDryBulXi wetBulTem(
                                                        redeclare package
      Medium = Medium_A) "Model for wet bulb temperature";
  Buildings.BoundaryConditions.WeatherData.ReaderTMY3 weaDat(filNam=
        "Resources/weatherdata/USA_CA_San.Francisco.Intl.AP.724940_TMY3.mos");
  Buildings.BoundaryConditions.WeatherData.Bus weaBus;
equation 
  connect(wetBulTem.TWetBul, tow.TAir);
  connect(TOut.y, wetBulTem.TDryBul);
  connect(weaDat.weaBus, weaBus);
  connect(weaBus.relHum, wetBulTem.Xi[1]);
  connect(weaBus.pAtm, wetBulTem.p);
end PartialStaticTwoPortCoolingTowerWetBulb;