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http://dx.doi.org/10.5804/LHIJ.2021.12.1.129

An Experimental Study on the Reduction Effects of Shading Devices on Sky Radiant Cooling in Winter  

Kim, Jin-Hee (국립공주대학교 건축공학과)
Kim, Young-Tag (에임트 주식회사 사업운영그룹)
Lee, Soo-Yeol ((주)선우시스 기술연구소)
Choi, Won-Ki ((주)선우시스 기술연구소)
Publication Information
Land and Housing Review / v.12, no.1, 2021 , pp. 129-137 More about this Journal
Abstract
External shading devices are well known solar control devices that can help reduce the cooling load of commercial buildings. For this study, experiments were conducted to examine the feasibility of shading devices in reducing both the cooling and heating loads. The influence of sky radiant cooling during winter was verified for the external shading device, internal roller blind, and window. Results can be summarized as follows. The temperature difference between the inner and outer surfaces of the window with the external shading device was 11.8℃ compared to 14.6℃ for one without the external shading device. This 2.8℃ difference was due to heat exchange by sky radiation when the surface temperature of the shading device was lower than the ambient outdoor air temperature. The roller blind resulted in a lower temperature of 0.8℃ compared to the average temperature of the window's air cavity. This was due to heat exchange by sky radiation of the roller blind surfaces. Without shading devices, the outside surface temperature of the window is about 3℃ higher. The study also found that when external shading devices were installed on both the southwest and southeast sides, the outside surface temperature of the windows were lower on the southwest side than the southeast side.
Keywords
External Shading Device; Sky Radiant Cooling; Energy Saving;
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  • Reference
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