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    Effects on Sustainability of Various Skylight Systems in Buildings with an Atrium
    (2012) Yıldırım, Kemal; Hidayetoğlu, M. Lutfi; Şen, Ahmet
    Purpose – The purpose of this study is to compare the natural lighting performance of roof skylight systems in buildings with atriums and to compare the sustainability and energy efficiency of several roof skylight systems for educational buildings with atriums. Design/methodology/approach – Five roof skylight systems previously assessed in another study were adapted for simulation. In order to determine the effects of each skylight system on natural lighting, all the physical data of the building to be studied were recorded and entered into a computer. Findings – The results of the study showed that roof skylight systems should be designed both to limit light during periods of maximum daylight to avoid such problems as glare, flare, and so on; and to direct light indoors as fully as possible during periods of limited daylight. In this regard, the “Moving Sunshade Double Layer” roof system showed better performance than the other four roof skylight systems. Research limitations/implications – In subsequent studies, roof systems appropriate for natural lighting should be studied for other plan types, hospitals, public buildings and so on. Moreover, real structures in which direct environment measurements can be taken could be used for obtaining data, instead of simulations. Practical implications – Use of the roof system suggested by the research will minimize lighting and air conditioning costs, and enhance building sustainability. Originality/value – This study explores methods of taking advantage of natural lighting indoors through the use of roof skylight systems, and identifies the most appropriate, sustainable and energy efficient roof skylight system for education buildings having an atrium.