Effects of Different Fenestration Configurations on Daylighting Performance in Unilateral Window under Clear and Overcast Sky Conditions

편측창에서 창개구부의 형상이 천공상태별 채광성능에 미치는 영향

  • Azmiree, Sultana (Graduate Student, Department of Architectural Engineering, Kyung Hee University) ;
  • Kim, Jeong Tai (Department of Architectural Engineering, Kyung Hee University)
  • Received : 2009.10.01
  • Accepted : 2009.10.23
  • Published : 2009.10.31

Abstract

Daylighting provides the opportunity for both energy savings and improved visual comfort. An accurate estimation of the amount of daylight entering a building is the key step for daylight designing. This research aims to assess comparative daylighting performance of four different configurations of fenestration in case of unilateral windows and their variation under clear and overcast sky conditions. The selected window openings in this study were single punched, double punched, multiple punched and clerestory, and the area was same for each type of window. The experiment was designed for an office space using 1/10 scale model. Daylighting performance was evaluated by measuring the illuminance on work-plane height using Agilent data logger and photometric sensor Li-Cor. Thecomputer program ECOTECT was also used to simulate the pattern of interior illuminance distribution. Clerestory window showed the best performance in term of both illuminance level and distribution in the experiment. Multiple punched window provided more uniform illuminance distribution than single punched window. Lowest daylighting performance in the experiment was shown by double punched window.

Acknowledgement

Supported by : National Research Foundation of Korea(NRF)

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