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AN INVESTIGATION BY THE BEP-TR METHOD OF THE EFFECT OF OBSTRUCTION ANGLE PARAMETER ON LIGHTING ENERGY PERFORMANCE AND DAYLIGHT SUPPLY


 Following the EN 15193, 2008 Energy Performance in Buildings Regulation in the European Union Member States, a comprehensive calculation can be made on lighting energy performance and daylight effect. This improved model accounts for Turkey’s “BEP-TR” (“Regulation on Energy Performance in Buildings”). In the present study, the effect of the obstruction angle parameter of buildings on lighting energy consumption and daylight provided is examined through a sample hotel project by the BEP-TR calculation method. This study investigates the effect of daylight on lighting energy performance alternatives that were produced according to the height, building distance variations (causing obstruction angle), and the correlation between annual lighting consumption values, daylight supply factor, and obstruction parameters. Accordingly, the current study aims to develop a method to assist zoning regulations, building intervals, and height decisions by determining specific ratios between obstruction parameters, daylight supply factor and lighting energy consumption values. Results of this study clearly show that obstruction parameter variables affect both the daylight supply factor and annual lighting energy significantly.