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- W2025897241 abstract "Various studies on lighting energy savings are conducted, given that lighting energy consumption accounts 23.5% of building energy consumption. Especially, external type light shelf's efficiency is acknowledged; however, its application is limited in Korea, where high rise building ratio is high, due to high wind pressure. This study delves into natural lighting system to cope with wind pressure, and proposes the punching plate-installed light shelf. This study actually draws lighting energy output, according to whether the punching plate is applied through the test-bed, and verifies the effectiveness of the punching plate-installed light shelf. The conclusion is presented below: First) The result of performance evaluation of light shelf with the punching plate in winter solstice showed that the awning area decreased as the opening ratio increased so that the indoor distributed illumination tended to increase, and <TEX>$-40^{circ}$</TEX> which was advantageous for awning was determined as the proper angle. Second) The light shelf with the punching plate in spring/autumn equinox shows improved lighting according to the angle, and the appropriate angle of light shelf with the punching plate has increased to <TEX>$15^{circ}$</TEX> and <TEX>$20^{circ}$</TEX> according to the opening ratio in comparison to <TEX>$5^{circ}C$</TEX> which is the appropriate angle of light shelf with no punching plate due to the reflection area reduced by the reflecting plate with holes. Third) The result of performance evaluation of light shelf with the punching plate in summer solstice showed that the lighting performance tended to decrease as the opening ratio increased. 4) The light shelf with the punching plate incurs a 50% energy loss in comparison to the light shelf with no punching plate. However, its effectiveness has been proven in the aspects that it can bring a 50% energy saving in comparison to the case with no installation of light shelf and that it can be designed in response to wind pressure on the high floors." @default.
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- W2025897241 date "2014-12-31" @default.
- W2025897241 modified "2023-09-25" @default.
- W2025897241 title "Performance Evaluation of Energy Reduction of Light Shelf Applying Punching Plate" @default.
- W2025897241 cites W1985019025 @default.
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- W2025897241 doi "https://doi.org/10.12813/kieae.2014.14.6.005" @default.
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