Buildings.HeatTransfer.Radiosity.Examples

Information

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

Package Content

Name	Description
OpaqueSurface	Test model for indoor source as an opaque surface
OutdoorRadiosity	Test model for outdoor radiosity

Buildings.HeatTransfer.Radiosity.Examples.OpaqueSurface

Information

This examples demonstrates two opaque surfaces that radiate toward each other. The model assumes that the view factor between the surfaces is equal to one.

Modelica definition

model OpaqueSurface 
  "Test model for indoor source as an opaque surface"
  extends Modelica.Icons.Example;

  Buildings.HeatTransfer.Sources.FixedTemperature T2(T=303.15) 
    "Boundary condition for surface 2";

  Buildings.HeatTransfer.Radiosity.OpaqueSurface bod1( absIR=0.3, A=1) 
    "Surface 1";
  Buildings.HeatTransfer.Sources.FixedTemperature T1(T=293.15) 
    "Boundary condition for surface 1";
  Buildings.HeatTransfer.Radiosity.OpaqueSurface bod2( absIR=0.3, A=1) 
    "Surface 2";
equation 
  connect(T1.port, bod1.heatPort);
  connect(T2.port, bod2.heatPort);
  connect(bod1.JOut, bod2.JIn);
  connect(bod2.JOut, bod1.JIn);
end OpaqueSurface;

Buildings.HeatTransfer.Radiosity.Examples.OutdoorRadiosity

Information

Parameters

Type	Name	Default	Description
Area	A	1	Area of receiving surface [m2]

Modelica definition

model OutdoorRadiosity "Test model for outdoor radiosity"
  extends Modelica.Icons.Example;
  Buildings.HeatTransfer.Radiosity.OpaqueSurface sur(A=A, absIR=1) 
    "Receiving surface";
  Buildings.HeatTransfer.Radiosity.OutdoorRadiosity outRad(A=A, vieFacSky=0.5) 
    "Outdoor radiosity model";
  parameter Modelica.SIunits.Area A=1 "Area of receiving surface";
  Modelica.Blocks.Sources.Ramp TSky(
    duration=1,
    height=30,
    offset=273.15) "Sky blackbody temperature";
  Modelica.Blocks.Sources.Constant TAir(k=273.15 + 20) 
    "Outside air temperature";
equation 
  connect(outRad.JOut, sur.JIn);
  connect(TAir.y, outRad.TBlaSky);
  connect(TSky.y, outRad.TOut);
end OutdoorRadiosity;