Abstract:
In the beginning, humans used architecture to protect their selves from nature and unsteady
environmental conditions. However, with time, modern buildings become more complex,
which need to fulfil the different types of functions [1]. So, humans started to concern more
about the visual and thermal comfort and energy efficiency of modern buildings.
Daylight is the perfect source of light that human has adapted with respect to evolution. So,
daylight harvesting is highly concerned in modern building designs in order to enhance
occupants’ visual and thermal comfort and reduce artificial lightings costs. Although this
should be wisely done since entering direct sunlight to the building envelope could cause
visual and thermal discomfort, increasing heat load which causes additional air conditioning
costs.
The effect of daylight harvesting depends on many parameters. Building location, building
orientation, building geometry, seasonal variation of the sun, window to wall ratio, window
glazing parameters, Solar heat gain coefficient, Window height, Building interior parameters,
shading devices, and solar control mechanisms are a few major parameters, which affect the
outcome of daylight harvesting.
This research discusses the effect of Seasonal variations, building geometry, window to wall
ratio and window orientation for a typical office building situated in tropical countries on
daylight harvesting.
Citation:
Ariyaratne, L.I. (2022). Effect of daylight harvesting on building lighting energy consumption [Master's theses, University of Moratuwa]. Institutional Repository University of Moratuwa. http://dl.lib.uom.lk/handle/123/21436