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00 | Honeybee


01 \| Daylight \| Material


02 \| Daylight \| Light Source


03 \| Daylight \| Recipes

04 | Daylight | Daylight


05 \| Energy \| Building Program


06 \| Energy \| Material \| Construction


07 \| Energy \| Schedule


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09 \| Energy \| HVACSystems

10 | Energy | Energy


11 \| THERM

12 | Developers


13 \| WIP

Vertical Sky Component

Analysis Recipie for Vertical Sky Component, which is typically used to evaluate daylight and sky access in urban areas.
The Vertical Sky Component (VSC) is described by the UK Building Research Establishment (BRE) as the ratio of the direct sky illuminance falling on the vertical wall at a reference point, to the simultaneous horizontal illuminance under an unobstructed sky [Littlefair, 1991]. It also states that the Standard CIE Overcast Sky model is to be used for the sky illuminance distribution. This means that the reference value for the VSC percentage is effectively the unobstructed horizontal sky component.
The calculation performed by this component comes from this discussion on the RADIANCE forum: http://www.radiance-online.org/pipermail/radiance-general/2006-September/004017.html

Inputs

Name	ID	Description	Type
Test Points	_testPoints	Test points	Goo
Pts Vectors	ptsVectors_	Point vectors	Goo
Test Mesh	testMesh_	Script variable verticalSkyComponent	Goo
Ad	_ad_	Number of ambient divisions. "The error in the Monte Carlo calculation of indirect illuminance will be inversely proportional to the square root of this number. A value of zero implies no indirect calculation."	Goo
Uniform Sky	uniformSky_	Set to true to run the study under a CIE uniform sky. Default is set to cloudy sky	Goo

Outputs

Name	ID	Description	Type
Analysis Recipe	analysisRecipe	Recipe for vertical sky component	Goo

Vertical Sky Component

Inputs

Outputs

Video Tutorials