Last update:00-04-24
Related Links
Introduction:
The design and analysis of daylighting systems present problems that span both architecture and engineering. Daylighting decisions affect of the building and the use of various environmental control systems. By definition, sunlight is direct light from the sun, and daylight is indirect light from the sun, i.e. light scattered by the earth's atmosphere and it is the light from the availability and the use of daylight for building design.
It is often necessary to provide a room with natural light from the sun or the sky. The qualities of this natural light may be thought desirable for a pleasant environment or they may be needed to perform certain tasks, such as exacting work with colour. The natural light can be used as the sole source of interior lighting or can be combined with artificial light.
Daylight is usually admitted into a building by means of windows or skylights; but these windows also transmit heat, sound and perhaps air. So the design of windows for a building, called fenestration, affects almost all the environmental variables. The provision of natural lighting in a building must not be designed without also considering questions of artificial lighting, heating, ventilation and sound control.
The quantity of natural light inside a room is governed by the factors listed below. By analyzing these factors it is possible to describe daylight numerically and to predict its effects in a room.
- The nature and brightness of the sky
- The size, shape and position of the windows
- Reflections from surfaces inside the room
- Reflections and obstructions from objects outside the room
Upon completion of this unit, you should be able to
understand:
a) Sky conditions
b) Daylight factor
c) Methods of Daylight Factor (DF) estimation
d) Models of artificial sky
e) Design consideration
In this unit, there are five chapters related to the solar
radiation, Go and see, you can have more understanding about this subject.
Sky Conditions
Daylight
Factor
Methods of Daylight
Factor (DF) Estimation
Models of Artificial Sky
Design Consideration
Related Links