modelOverhangAndScreen
Roof overhangs and screen shading
Extends from IDEAS.Buildings.Components.Shading.Interfaces.DoubleShading (Two shading components in series).
Information
This model describes the transient behaviour of solar irradiance on a window below a non-fixed horizontal or vertical overhang combined with a controllable screen.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | shaCorr | 0.24 | Shortwave transmittance of shortwave radiation |
| Boolean | controlled (from PartialShading) | true | if true, shading has a control input |
| Modelica.Units.SI.Area | A_glazing (from PartialShading) | Surface area of the glazing | |
| Modelica.Units.SI.Area | A_frame (from PartialShading) | Surface area of the frame | |
| Modelica.Units.SI.Angle | inc (from PartialShading) | Surface inclination | |
| Modelica.Units.SI.Temperature | Tenv_nom (from PartialShading) | 280 | Nominal temperature of environment |
| Modelica.Units.SI.Emissivity | epsSw_frame (from PartialShading) | Short wave solar absorption coefficient of the frame | |
| Modelica.Units.SI.Emissivity | epsLw_frame (from PartialShading) | Long wave solar absorption coefficient of the frame | |
| Modelica.Units.SI.Emissivity | epsLw_glazing (from PartialShading) | Long wave solar absorption coefficient of the glazing | |
| Modelica.Units.SI.Emissivity | epsSw_shading (from PartialShading) | 0.8 | Short wave emissivity of the shading object |
| Real | g_glazing (from PartialShading) | Nominal shading coefficient of the glazing | |
| Boolean | linCon (from PartialShading) | false | Linearise convective heat transfer |
| Boolean | linRad (from PartialShading) | false | Linearise radiative heat transfer |
| Boolean | haveBoundaryPorts (from PartialShading) | true | Include ports for setting boundary conditions |
| Boolean | haveFrame (from PartialShading) | A_frame*epsLw_frame > 0 | Frame enabled |
| Modelica.Units.SI.CoefficientOfHeatTransfer | hSha (from PartialShading) | 12 | Equivalent thermal conductance of the shading device |
| Window properties | |||
| Modelica.Units.SI.Length | hWin | Window height | |
| Modelica.Units.SI.Length | wWin | Window width | |
| Modelica.Units.SI.Angle | azi (from PartialShading) | Window azimuth angle | |
| Overhang properties | |||
| Modelica.Units.SI.Length | wLeft | Left overhang width measured from the window corner | |
| Modelica.Units.SI.Length | wRight | Right overhang width measured from the window corner | |
| Modelica.Units.SI.Length | dep | Overhang depth perpendicular to the wall plane | |
| Modelica.Units.SI.Length | gap | Distance between window upper edge and overhang lower edge | |
Connectors
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.Irradiance | HSha (from PartialShading) | HShaDirTil + HShaSkyDifTil + HShaGroDifTil | Total shaded solar irradiance |
| Modelica.Units.SI.Irradiance | H (from PartialShading) | HDirTil + HSkyDifTil + HGroDifTil | Total unshaded solar irradiance |
| PartialShading | stateShading1 (from DoubleShading) | ||
| PartialShading | stateShading2 (from DoubleShading) |
Revisions
-
July 18, 2022 by Filip Jorissen:
Refactored for #1270 for including thermal effect of screens. -
May 26, 2017 by Filip Jorissen:
Revised implementation for renamed portsHDirTiletc. See #735. -
July 2015, by Filip Jorissenr:
Now extending from IDEAS.Buildings.Components.Interfaces.DoubleShading. -
December 2014, by Filip Jorissenr:
First implementation.