Accueil > VALORISATION > Rеvuе des Enеrgies Renouvеlablеs > Numéros Spéciaux > "SIENR"18 - Ghardaïa 2018" > Study of the effects of daylight on optimum dimension of windows in hot climate

Study of the effects of daylight on optimum dimension of windows in hot climate

C. Mebarki, E. Djakab and S.M.K. El Hassar

Built Environment Laboratory, LBE, University of Science and Technology Houari Boumediene, El Alia 16111, Bab Ezzouar, Algiers, Algeria.

Abstract

The optimization of energy consumption in hot climate is complex, for this climate daylighting can be used as passive strategy to reduce energy consumption. The window as sensible thermal load element in building is also a source of daylight. To avoid problems of glare and overheating the window size should be limited. ASHRAE proposed a Window to Wall Ratio (WWR) which is considered as the optimal window size that ensures minimum annual thermal loads. Unlike the WWR which is considered as optimal for the whole year, this study shows that the optimal window size varies with day time and depends on : type of glazing, the orientation and the variation of solar radiation intensity. In the present work Genetic Algorithms are used to optimize window size taking into account the daylight. A typical office room located in hot climate, in this case Ghardaia, Algeria, is selected as a case study. The results show that the daylight is a key factor to limit the window size in hot climate for minimum thermal loads.

Keywords

Energy consumption - Window size - Optimization - Daylight - Hot climate.

Study of the effects of daylight on optimum dimension of windows in hot climate
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