The daylight factors report contains the pre-calculated hourly daylight factors for the four CIE sky types (clear, clear turbid, intermediate, and overcast sky) and two daylight reference points for each exterior window of a daylight zone. The file is CSV formatted – ready for spreadsheet viewing. The input for requesting the report is simple:
The following shows an excerpt the daylight factors for a window without shade:
This file contains daylight factors for all exterior windows of daylight zones.
If only one reference point the last 4 columns in the data will be zero.
MonthAndDay,Zone Name,Window Name,Window State Hour,Daylight Factor for Clear Sky at Reference point 1,Daylight Factor for Clear Turbid Sky at Reference point 1,Daylight Factor for Intermediate Sky at Reference point 1,Daylight Factor for Overcast Sky at Reference point 1,Daylight Factor for Clear Sky at Reference point 2,Daylight Factor for Clear Turbid Sky at Reference point 2,Daylight Factor for Intermediate Sky at Reference point 2,Daylight Factor for Overcast Sky at Reference point 2 01/21,PERIMETER\_BOT\_ZN\_1,PERIMETER\_BOT\_ZN\_1\_WALL\_SOUTH\_WINDOW,Base Window 1,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 2,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 3,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 4,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 5,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 6,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 7,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 8,5.08810E-002,5.78633E-002,2.59271E-002,1.42712E-002,0.00000,0.00000,0.00000,0.00000 9,5.85018E-002,6.68126E-002,3.02054E-002,1.42712E-002,0.00000,0.00000,0.00000,0.00000 10,6.26710E-002,7.12830E-002,3.37475E-002,1.42712E-002,0.00000,0.00000,0.00000,0.00000 11,6.35876E-002,7.17181E-002,3.59982E-002,1.42712E-002,0.00000,0.00000,0.00000,0.00000 12,6.23746E-002,6.98139E-002,3.66365E-002,1.42712E-002,0.00000,0.00000,0.00000,0.00000 13,6.39669E-002,7.21972E-002,3.61684E-002,1.42712E-002,0.00000,0.00000,0.00000,0.00000 14,6.25455E-002,7.10272E-002,3.39911E-002,1.42712E-002,0.00000,0.00000,0.00000,0.00000 15,5.85994E-002,6.67866E-002,3.05581E-002,1.42712E-002,0.00000,0.00000,0.00000,0.00000 16,5.17581E-002,5.89493E-002,2.63461E-002,1.42712E-002,0.00000,0.00000,0.00000,0.00000 17,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 18,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 19,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 20,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 21,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 22,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 23,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000 24,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000,0.00000
The first line describes the data in the eplusout.dfs file. The second line describes the header of the daily row:
|Month and Day||Zone Name||Window Name||Window State|
The Window State column has three possible outputs – Base Window indicating windows without shades; a numeric value, from 0.0 to 180.0 for every 10.0 step, indicating the slat angle (in degrees) of the blind shading the window; blink indicating windows in shaded state by shades, screens, and blinds with fixed slat angle.
The third line describes the hourly daylight factors. Note that the last 4 columns are 0.0 because there is only one daylight reference point.:
|Hour||Daylight factor for clear sky at reference point 1||Daylight factor for clear turbid sky at reference point 1||Daylight factor for intermediate sky at reference point 1||Daylight factor for overcast sky at reference point 1||Daylight factor for clear sky at reference point 2||Daylight factor for clear turbid sky at reference point 2||Daylight factor for intermediate sky at reference point 2||Daylight factor for overcast sky at reference point 2|