Buildings.HeatTransfer.Data.OpaqueSurfaces

Information

Package with records for opaque surfaces.

The parameter absIR is used to compute infrared heat radiation (in the infrared spectrum). The parameter absSol is used to compute solar heat radiation (in the solar spectrum).

Extends from Modelica.Icons.MaterialPropertiesPackage (Icon for package containing property classes).

Package Content

Name	Description
Generic	Thermal properties of opaque surfaces
Black	Black surface with absIR=1.0, absSol=1.0
Gray	Gray surface with absIR=0.5, absSol=0.5
White	White surface with absIR=0.0, absSol=0.0

Buildings.HeatTransfer.Data.OpaqueSurfaces.Generic

Information

This record implements thermophysical properties for opaque surfaces.

The parameter absIR is used to compute infrared heat radiation (in the infrared spectrum). The parameter absSol is used to compute solar heat radiation (in the solar spectrum).

Extends from Modelica.Icons.Record (Icon for records).

Parameters

Type	Name	Default	Description
Area	A		Area [m2]
Angle	til		Surface tilt (0: ceiling, pi/2: wall, pi: floor [rad]
Emissivity	absIR	0.84	Infrared absorptivity [1]
Emissivity	absSol	0.84	Solar absorptivity [1]

Modelica definition

record Generic "Thermal properties of opaque surfaces"
    extends Modelica.Icons.Record;
 parameter Modelica.SIunits.Area A "Area";
 parameter Modelica.SIunits.Angle til 
    "Surface tilt (0: ceiling, pi/2: wall, pi: floor";
 parameter Modelica.SIunits.Emissivity absIR=0.84 "Infrared absorptivity";
 parameter Modelica.SIunits.Emissivity absSol=0.84 "Solar absorptivity";
 final parameter Boolean isFloor=til > 2.74889125 and til < 3.53428875 
    "Flag, true if construction is a floor";

end Generic;

Buildings.HeatTransfer.Data.OpaqueSurfaces.Black

Parameters

Type	Name	Default	Description
Area	A		Area [m2]
Angle	til		Surface tilt (0: ceiling, pi/2: wall, pi: floor [rad]
Emissivity	absIR	1.0	Infrared absorptivity [1]
Emissivity	absSol	1.0	Solar absorptivity [1]

Modelica definition

record Black=Buildings.HeatTransfer.Data.OpaqueSurfaces.Generic (absIR=1.0,
      absSol=1.0) "Black surface with absIR=1.0, absSol=1.0";

Buildings.HeatTransfer.Data.OpaqueSurfaces.Gray

Parameters

Type	Name	Default	Description
Area	A		Area [m2]
Angle	til		Surface tilt (0: ceiling, pi/2: wall, pi: floor [rad]
Emissivity	absIR	0.5	Infrared absorptivity [1]
Emissivity	absSol	0.5	Solar absorptivity [1]

Modelica definition

record Gray=Buildings.HeatTransfer.Data.OpaqueSurfaces.Generic (absIR=0.5,
      absSol=0.5) "Gray surface with absIR=0.5, absSol=0.5";

Buildings.HeatTransfer.Data.OpaqueSurfaces.White

Parameters

Type	Name	Default	Description
Area	A		Area [m2]
Angle	til		Surface tilt (0: ceiling, pi/2: wall, pi: floor [rad]
Emissivity	absIR	0.0	Infrared absorptivity [1]
Emissivity	absSol	0.0	Solar absorptivity [1]

Modelica definition

record White=Buildings.HeatTransfer.Data.OpaqueSurfaces.Generic (absIR=0.0,
      absSol=0.0) "White surface with absIR=0.0, absSol=0.0";