Daylighting - Calculation of the daylight and the solar radiation in building interiors
7 important questions on Daylighting - Calculation of the daylight and the solar radiation in building interiors
The conditions on the surface of a glazing module depend on
- Geographical orientation
- Time of day and year
- Turbidity
- Sunshine duration
- Cloud coverage
- Obstruction
- Position and orientation of the glazing module
Three different sky conditions
- Clear sky
- Overcast sky
- Mean sky -> combination of clear and overcast sky
Daytime factor D
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Switching behaviour of occupants
- Occupants switch on the lights when the illuminance caused by daylight is too low
- Mostly the entire electric lighting system is switched on
- Light is switched off when the occupants leave the room for a longer period of time
Relative annual utilization time
Relative annual usable luminous exposure
Energy savings potential
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