Spatial Daylight Autonomy
- [source code]
Calculate Spatial Daylight Autonomy (sDA) from lists of daylight autonomy values.
As per IES-LM-83-12 Spatial Daylight Autonomy (sDA) is a metric describing annual sufficiency of ambient daylight levels in interior environments. It is defined as the percent of an analysis area (the area where calcuations are performed -typically across an entire space) that meets a minimum daylight illuminance level for a specified fraction of the operating hours per year. The sDA value is expressed as a percentage of area.

Inputs

    DA [Required]
    A data tree of daylight autonomy values output from the "HB Annual Dalyight" recipe or the "HB Annual Daylight Metrics" component.
    mesh
    An optional list of Meshes that align with the _DA data tree above, which will be used to assign an area to each sensor. If no mesh is connected here, it will be assumed that each sensor represents an equal area to all of the others.
    target_DA
    A number for the minimum target value for daylight autonomy at wich a given sensor is considered well daylit. (default: 50).

Outputs

    report
    Reports, errors, warnings, etc.
    sDA
    Spatial daylight autonomy as percentage of area for each analysis grid.
    pass_fail
    A data tree of zeros and ones, which indicate whether a given senor passes the criteria for being daylit (1) or fails the criteria (0). Each value is for a different sensor of the grid. These can be plugged into the "LB Spatial Heatmap" component along with meshes of the sensor grids to visualize results.
Last modified 1mo ago
Export as PDF
Copy link