Buildings.HeatTransfer.Data.OpaqueConstructions
Package with opaque constructions for floors, walls, etc.
Information
Package with material definitions for constructions
with one or more layers of material.
By convention, layer[1] is facing the outside, and the last
layer is facing the room-side.
This is the same convention as is used in EnergyPlus and in Window 6.
The parameters absIR_a and absIR_b
are used to compute infrared heat radiation (in the infrared spectrum).
The parameters absSol_a and absSol_b
are 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 constructions |
| Insulation100Concrete200
|
Construction with 100 mm insulation and 200 mm concrete |
| Brick120
|
Construction with 120mm brick |
| Concrete200
|
Construction with 200mm concrete |
Buildings.HeatTransfer.Data.OpaqueConstructions.Generic
Thermal properties of opaque constructions
Information
Generic record with material definitions for constructions with one or more layers of material. By convention,layer[1] is facing the outside, and the last
layer is facing the room-side.
This is the same convention as is used in EnergyPlus and in Window 6.
The parameters absIR_a and absIR_b
are used to compute infrared heat radiation (in the infrared spectrum).
The parameters absSol_a and absSol_b
are used to compute solar heat radiation (in the solar spectrum).
The parameter roughness_a is used if the convective heat transfer
coefficient of the exterior surface is computed based on the wind-speed, wind-direction
and temperature difference. See
Buildings.HeatTransfer.Convection.Exterior.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | nLay | Number of layers | |
| Material | material[nLay] | Layer by layer declaration of material, starting from outside to room-side | |
| Emissivity | absIR_a | 0.9 | Infrared absorptivity of surface a (usually outside-facing surface) [1] |
| Emissivity | absIR_b | 0.9 | Infrared absorptivity of surface b (usually room-facing surface) [1] |
| Emissivity | absSol_a | 0.5 | Solar absorptivity of surface a (usually outside-facing surface) [1] |
| Emissivity | absSol_b | 0.5 | Solar absorptivity of surface b (usually room-facing surface) [1] |
| SurfaceRoughness | roughness_a | Buildings.HeatTransfer.Types... | Exterior surface roughness |
| Advanced | |||
| Integer | nSta[nLay] | {material[i].nSta for i in 1... | Number of states (do not overwrite, used to work around Dymola 2017 bug) |
Modelica definition
record Generic "Thermal properties of opaque constructions"
parameter Integer nLay(min=1) "Number of layers";
parameter Buildings.HeatTransfer.Data.BaseClasses.Material material[nLay]
"Layer by layer declaration of material, starting from outside to room-side";
final parameter Real R(unit="m2.K/W")=sum(material[i].R for i in 1:nLay)
"Thermal resistance per unit area";
parameter Integer nSta[nLay](each min=1) = {material[i].nSta for i in 1:nLay}
"Number of states (do not overwrite, used to work around Dymola 2017 bug)";
parameter Modelica.SIunits.Emissivity absIR_a=0.9
"Infrared absorptivity of surface a (usually outside-facing surface)";
parameter Modelica.SIunits.Emissivity absIR_b=0.9
"Infrared absorptivity of surface b (usually room-facing surface)";
parameter Modelica.SIunits.Emissivity absSol_a=0.5
"Solar absorptivity of surface a (usually outside-facing surface)";
parameter Modelica.SIunits.Emissivity absSol_b=0.5
"Solar absorptivity of surface b (usually room-facing surface)";
parameter Buildings.HeatTransfer.Types.SurfaceRoughness roughness_a=
Buildings.HeatTransfer.Types.SurfaceRoughness.Medium
"Exterior surface roughness";
end Generic;
Buildings.HeatTransfer.Data.OpaqueConstructions.Insulation100Concrete200
Construction with 100 mm insulation and 200 mm concrete
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | nLay | 2 | Number of layers |
| Material | material[nLay] | {Solids.InsulationBoard(x=0.... | Layer by layer declaration of material, starting from outside to room-side |
| Emissivity | absIR_a | 0.9 | Infrared absorptivity of surface a (usually outside-facing surface) [1] |
| Emissivity | absIR_b | 0.9 | Infrared absorptivity of surface b (usually room-facing surface) [1] |
| Emissivity | absSol_a | 0.5 | Solar absorptivity of surface a (usually outside-facing surface) [1] |
| Emissivity | absSol_b | 0.5 | Solar absorptivity of surface b (usually room-facing surface) [1] |
| SurfaceRoughness | roughness_a | Buildings.HeatTransfer.Types... | Exterior surface roughness |
| Advanced | |||
| Integer | nSta[nLay] | {material[i].nSta for i in 1... | Number of states (do not overwrite, used to work around Dymola 2017 bug) |
Modelica definition
record Insulation100Concrete200 =
Buildings.HeatTransfer.Data.OpaqueConstructions.Generic (
material={Solids.InsulationBoard(x=0.1),
Solids.Concrete(x=0.2)},
final nLay=2)
"Construction with 100 mm insulation and 200 mm concrete";
Buildings.HeatTransfer.Data.OpaqueConstructions.Brick120
Construction with 120mm brick
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | nLay | 1 | Number of layers |
| Material | material[nLay] | {Solids.Brick(x=0.12)} | Layer by layer declaration of material, starting from outside to room-side |
| Emissivity | absIR_a | 0.9 | Infrared absorptivity of surface a (usually outside-facing surface) [1] |
| Emissivity | absIR_b | 0.9 | Infrared absorptivity of surface b (usually room-facing surface) [1] |
| Emissivity | absSol_a | 0.5 | Solar absorptivity of surface a (usually outside-facing surface) [1] |
| Emissivity | absSol_b | 0.5 | Solar absorptivity of surface b (usually room-facing surface) [1] |
| SurfaceRoughness | roughness_a | Buildings.HeatTransfer.Types... | Exterior surface roughness |
| Advanced | |||
| Integer | nSta[nLay] | {material[i].nSta for i in 1... | Number of states (do not overwrite, used to work around Dymola 2017 bug) |
Modelica definition
record Brick120 =
Buildings.HeatTransfer.Data.OpaqueConstructions.Generic (
material={Solids.Brick(x=0.12)},
final nLay=1) "Construction with 120mm brick";
Buildings.HeatTransfer.Data.OpaqueConstructions.Concrete200
Construction with 200mm concrete
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | nLay | 1 | Number of layers |
| Material | material[nLay] | {Solids.Concrete(x=0.2)} | Layer by layer declaration of material, starting from outside to room-side |
| Emissivity | absIR_a | 0.9 | Infrared absorptivity of surface a (usually outside-facing surface) [1] |
| Emissivity | absIR_b | 0.9 | Infrared absorptivity of surface b (usually room-facing surface) [1] |
| Emissivity | absSol_a | 0.5 | Solar absorptivity of surface a (usually outside-facing surface) [1] |
| Emissivity | absSol_b | 0.5 | Solar absorptivity of surface b (usually room-facing surface) [1] |
| SurfaceRoughness | roughness_a | Buildings.HeatTransfer.Types... | Exterior surface roughness |
| Advanced | |||
| Integer | nSta[nLay] | {material[i].nSta for i in 1... | Number of states (do not overwrite, used to work around Dymola 2017 bug) |
Modelica definition
record Concrete200 =
Buildings.HeatTransfer.Data.OpaqueConstructions.Generic (
material={Solids.Concrete(x=0.2)},
final nLay=1) "Construction with 200mm concrete";