Lighting of Commercial Buildings by Conveying Sunlight

Yavuz Soydan, Ahmet Demirer, Akin Oguz Kapti, Tahsin Engin, Canan Kandilli

Abstract


Energy problems are even more serious for regions which do
not have fossil energy reserves, therefore the countries in these regions have to import the needed energy. There is a need to look for different alternatives to supplement the available energy in order to support and maintain the improvements in living standards of the people in urban areas. The use, for instance, of daylight for illuminating buildings can help minimize energy consumption in buildings and reduce the total depen-dency on imported energy. Buildings which can positively benefit from the use of daylight are mostly public buildings such as hospitals, schools and office buildings, as well as those used in the industry. Today, almost one-quarter of the total electricity produced is using artificial lighting for both commercial and state building interiors in some developed countries.
This paper introduces the most recent day lighting methods of Hybrid Solar Lighting (HSL), High Intensity Discharge (HID) and Solid-State Lighting (SSL). The key factors such as sunlight availability, using sce-narios in the buildings, time-of day electric utility rates, cost, and efficacy of the displaced electric lights are considered. Current study indicated that amortizing period is achievable in a few years.

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