Buildings.BoundaryConditions.SolarIrradiation.Examples

Information

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

Package Content

Name	Description
DiffuseIsotropic	Test model for diffuse solar irradiation on a tilted surface using the isotropic model
DiffusePerez	Test model for diffuse solar irradiation on a tilted surface using the Perez model
DirectTiltedSurface	Test model for direct solar irradiation on a tilted surface

Buildings.BoundaryConditions.SolarIrradiation.Examples.DiffuseIsotropic

Information

Parameters

Type	Name	Default	Description
Real	rho	0.2	Ground reflectance

Connectors

Type	Name	Description
Bus	weaBus

Modelica definition

model DiffuseIsotropic 
  "Test model for diffuse solar irradiation on a tilted surface using the isotropic model"
  extends Modelica.Icons.Example;
  parameter Real rho=0.2 "Ground reflectance";

  Buildings.BoundaryConditions.WeatherData.ReaderTMY3 weaDat(filNam=
        "modelica://Buildings/Resources/weatherdata/USA_CA_San.Francisco.Intl.AP.724940_TMY3.mos");
  Buildings.BoundaryConditions.WeatherData.Bus weaBus;
  Buildings.BoundaryConditions.SolarIrradiation.DiffuseIsotropic
        HDifRoo(til=Buildings.HeatTransfer.Types.Tilt.Ceiling,
                rho=rho) "Diffuse irradiation on roof";
  Buildings.BoundaryConditions.SolarIrradiation.DiffuseIsotropic
        HDifFlo(til=Buildings.HeatTransfer.Types.Tilt.Floor,
                rho=rho) "Diffuse irradiation on floor";
  Buildings.BoundaryConditions.SolarIrradiation.DiffuseIsotropic
        HDifWal(
        til=Buildings.HeatTransfer.Types.Tilt.Wall,
        rho=rho) "Diffuse irradiation on wall";

equation 
  connect(weaDat.weaBus, weaBus);

  connect(weaBus,HDifRoo. weaBus);
  connect(weaBus,HDifFlo. weaBus);
  connect(weaBus,HDifWal. weaBus);
end DiffuseIsotropic;

Buildings.BoundaryConditions.SolarIrradiation.Examples.DiffusePerez

Information

This model tests the implementation of Perez' model for diffuse solar radiation. The three instances of Perez' model compute the diffuse solar irradiation on a roof, a wall and a floor. Since the floor only sees the ground but not the radiative heat flow that is scattered in the atmosphere, it receives the lowest amount of diffuse solar irradiation.

Parameters

Type	Name	Default	Description
Angle	lat	37/180*Modelica.Constants.pi	Latitude [rad]
Angle	azi	0.3	Azi angle [rad]
Angle	til	0.5	Tilted angle [rad]

Connectors

Type	Name	Description
Bus	weaBus

Modelica definition

model DiffusePerez 
  "Test model for diffuse solar irradiation on a tilted surface using the Perez model"
  extends Modelica.Icons.Example;
  parameter Modelica.SIunits.Angle lat=37/180*Modelica.Constants.pi "Latitude";
  parameter Modelica.SIunits.Angle azi=0.3 "Azi angle";
  parameter Modelica.SIunits.Angle til=0.5 "Tilted angle";
  Buildings.BoundaryConditions.WeatherData.ReaderTMY3 weaDat(filNam=
        "modelica://Buildings/Resources/weatherdata/USA_CA_San.Francisco.Intl.AP.724940_TMY3.mos");
  Buildings.BoundaryConditions.WeatherData.Bus weaBus;
  Buildings.BoundaryConditions.SolarIrradiation.DiffusePerez HDifRoo(
    til=Buildings.HeatTransfer.Types.Tilt.Ceiling,
    lat=0.6457718232379,
    azi=0.78539816339745) "Diffuse irradiation on roof";
  Buildings.BoundaryConditions.SolarIrradiation.DiffusePerez HDifFlo(
    til=Buildings.HeatTransfer.Types.Tilt.Floor,
    lat=0.6457718232379,
    azi=0.78539816339745) "Diffuse irradiation on floor";
  Buildings.BoundaryConditions.SolarIrradiation.DiffusePerez HDifWal(
    til=Buildings.HeatTransfer.Types.Tilt.Wall,
    lat=0.6457718232379,
    azi=0.78539816339745) "Diffuse irradiation on wall";
equation 
  connect(weaDat.weaBus, weaBus);
  connect(weaBus,HDifRoo. weaBus);

  connect(weaBus, HDifFlo.weaBus);
  connect(weaBus, HDifWal.weaBus);
end DiffusePerez;

Buildings.BoundaryConditions.SolarIrradiation.Examples.DirectTiltedSurface

Information

This model tests the direct solar irradiation received on a ceiling, a wall and a floor. The assert statement will stop the simulation if the floor receives any direct solar irradiation.

Parameters

Type	Name	Default	Description
Angle	lat	37/180*Modelica.Constants.pi	Latitude [rad]

Connectors

Type	Name	Description
Bus	weaBus

Modelica definition

model DirectTiltedSurface 
  "Test model for direct solar irradiation on a tilted surface"
  extends Modelica.Icons.Example;
  parameter Modelica.SIunits.Angle lat=37/180*Modelica.Constants.pi "Latitude";
  Buildings.BoundaryConditions.WeatherData.ReaderTMY3 weaDat(filNam=
        "modelica://Buildings/Resources/weatherdata/USA_IL_Chicago-OHare.Intl.AP.725300_TMY3.mos");
  Buildings.BoundaryConditions.WeatherData.Bus weaBus;
  Buildings.BoundaryConditions.SolarIrradiation.DirectTiltedSurface
                                                             HDirRoo(
    til=Buildings.HeatTransfer.Types.Tilt.Ceiling,
    lat=0.6457718232379,
    azi=0.78539816339745) "Direct irradiation on roof";
  Buildings.BoundaryConditions.SolarIrradiation.DirectTiltedSurface
                                                             HDirFlo(
    til=Buildings.HeatTransfer.Types.Tilt.Floor,
    lat=0.6457718232379,
    azi=0.78539816339745) "Direct irradiation on floor";
  Buildings.BoundaryConditions.SolarIrradiation.DirectTiltedSurface
                                                             HDirWal(
    til=Buildings.HeatTransfer.Types.Tilt.Wall,
    lat=0.6457718232379,
    azi=0.78539816339745) "Direct irradiation on wall";
  Buildings.Utilities.Diagnostics.AssertEquality assEqu 
    "Assert to ensure that direct radiation received by floor construction is zero";
  Modelica.Blocks.Sources.Constant const(k=0);
equation 
  connect(weaDat.weaBus, weaBus);
  connect(HDirRoo.weaBus, weaBus);
  connect(HDirWal.weaBus, weaBus);
  connect(HDirFlo.weaBus, weaBus);
  connect(assEqu.u1, HDirFlo.H);
  connect(const.y, assEqu.u2);
end DirectTiltedSurface;