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

Amount of daylight entering a building
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

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

Time interval during which the required illuminance caused by daylight is reached at one or more points given in a space

Relative annual usable luminous exposure

the annual need for lighting at one or more given points in space resulting from the recommended illuminance and the annual working hours

Energy savings potential

The spatial distribution of the relative annual utilization time or the relative annual usable luminous exposure, determine the energy savings potential resulting from daylight utilization

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo