Buildings.BoundaryConditions.SolarGeometry.Examples

This example computes the solar incidence angle on tilted surfaces. There are fives surfaces, a horizontal surface and a surface that faces Norths, East, South and West.

Modelica definition

Name	Description
IncidenceAngle	Test model for solar incidence angle
ProjectedShadowLength	Test model for projected shadow length
ZenithAngle	Test model for zenith angle

model IncidenceAngle "Test model for solar incidence angle" extends Modelica.Icons.Example; Buildings.BoundaryConditions.SolarGeometry.IncidenceAngle incAngHor( til=Buildings.Types.Tilt.Ceiling, lat=0.73097781993588, azi=0.3) "Incidence angle on horizontal surface"; Buildings.BoundaryConditions.WeatherData.ReaderTMY3 weaDat( filNam="modelica://Buildings/Resources/weatherdata/USA_IL_Chicago-OHare.Intl.AP.725300_TMY3.mos") "Weather data (Chicago)"; Buildings.BoundaryConditions.SolarGeometry.IncidenceAngle incAngNor( lat=0.73097781993588, azi=Buildings.Types.Azimuth.N, til=Buildings.Types.Tilt.Wall) "Incidence angle on North-facing surface"; Buildings.BoundaryConditions.SolarGeometry.IncidenceAngle incAngWes( lat=0.73097781993588, azi=Buildings.Types.Azimuth.W, til=Buildings.Types.Tilt.Wall) "Incidence angle on West-facing surface"; Buildings.BoundaryConditions.SolarGeometry.IncidenceAngle incAngSou( lat=0.73097781993588, azi=Buildings.Types.Azimuth.S, til=Buildings.Types.Tilt.Wall) "Incidence angle on South-facing surface"; Buildings.BoundaryConditions.SolarGeometry.IncidenceAngle incAngEas( lat=0.73097781993588, azi=Buildings.Types.Azimuth.E, til=Buildings.Types.Tilt.Wall) "Incidence angle on East-facing surface"; equation connect(weaDat.weaBus, incAngHor.weaBus); connect(incAngNor.weaBus, weaDat.weaBus); connect(incAngWes.weaBus, weaDat.weaBus); connect(incAngSou.weaBus, weaDat.weaBus); connect(incAngEas.weaBus, weaDat.weaBus); end IncidenceAngle;

Buildings.BoundaryConditions.SolarGeometry.Examples.ProjectedShadowLength

Information

This example computes how far a shadow of a 2 meter high object is in different directions. The figure below shows this length for January 1 in Chicago. Note that the length of the shadow is negative if the azimuth is selected to be south because the shadow is towards the north.

Parameters

Modelica definition

Type	Name	Default	Description
Length	h	2	Height of object [m]

model ProjectedShadowLength "Test model for projected shadow length" extends Modelica.Icons.Example; parameter Modelica.SIunits.Length h = 2 "Height of object"; Buildings.BoundaryConditions.SolarGeometry.ProjectedShadowLength proShaLenEas( azi=Buildings.Types.Azimuth.E, h=h, filNam="modelica://Buildings/Resources/weatherdata/USA_IL_Chicago-OHare.Intl.AP.725300_TMY3.mos") "Projected shadow length facing east"; Buildings.BoundaryConditions.SolarGeometry.ProjectedShadowLength proShaLenSou( azi=Buildings.Types.Azimuth.S, h=h, filNam="modelica://Buildings/Resources/weatherdata/USA_IL_Chicago-OHare.Intl.AP.725300_TMY3.mos") "Projected shadow length facing south"; Buildings.BoundaryConditions.SolarGeometry.ProjectedShadowLength proShaLenWes( azi=Buildings.Types.Azimuth.W, h=h, filNam="modelica://Buildings/Resources/weatherdata/USA_IL_Chicago-OHare.Intl.AP.725300_TMY3.mos") "Projected shadow length facing West"; Buildings.BoundaryConditions.SolarGeometry.ProjectedShadowLength proShaLenNor( azi=Buildings.Types.Azimuth.N, h=h, filNam="modelica://Buildings/Resources/weatherdata/USA_IL_Chicago-OHare.Intl.AP.725300_TMY3.mos") "Projected shadow length facing North"; end ProjectedShadowLength;

Buildings.BoundaryConditions.SolarGeometry.Examples.ZenithAngle

Information

This example computes the zenith angle, which is the angle between the earth surface normal and the sun beam.

Modelica definition

model ZenithAngle "Test model for zenith angle" extends Modelica.Icons.Example; Buildings.BoundaryConditions.SolarGeometry.ZenithAngle zen(lat=0.2) "Zenith angle"; Buildings.BoundaryConditions.WeatherData.ReaderTMY3 weaDat( filNam="modelica://Buildings/Resources/weatherdata/USA_IL_Chicago-OHare.Intl.AP.725300_TMY3.mos"); equation connect(weaDat.weaBus, zen.weaBus); end ZenithAngle;