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창호 부착형 소음저감 자연환기장치 시제품의 설계인자 변화에 따른 차음성능 실험
지원길,양홍석,장서일 한국생활환경학회 2020 한국생활환경학회지 Vol.27 No.3
The purpose of this study is to develop natural ventilation devices that can reduce traffic noise in open conditions by the installation on the building envelope of high-rise apartments. Two naturally ventilated prototypes, plenum and louver types, were manufactured after reviewing previous works. The dimension of the devices has 837(W)×300(H)×85(D) mm which is determined by considering the size of window flame and indoor visibility. Various design variables focused on material properties in the cavity were selected by including opening conditions, amount of acoustic absorber, and application of micro-perforated panel. The experiment was carried out by following the relevant standard in a sound insulation laboratory. Within the considered design variables, the result shows that, in the open condition, the maximum sound insulation in the weighted sound reduction index corrected for road traffic noise, RW+Ctr, showed 19 dB and 12 dB for the plenum and louver devices, respectively. In the closed condition, the maximum RW+Ctr of 23 dB and 14 dB were shown for the plenum and louver devices, respectively. Under natural ventilation conditions, the RW+Ctr was improved by 4 dB for the plenum and 2 dB for the louver after installing the absorber and perforated panel in the cavity.
외부소음 저감을 위한 자연환기형 플리넘 장치 설계인자 분석 연구
지원길(Ji, Won-Gil),양홍석(Yang, Hong-Seok),장서일(Chang, Seo-Il) 한국건축친환경설비학회 2020 건축환경설비 Vol.14 No.2
Due to urbanization, traffic noise complaints are increasing in areas near roads, and urgent alternatives are required to provide a comfortable living environment for the people. In this study, a device that can be attached to the windows of apartment houses were studied to directly block the traffic noise at a building facade, by securing sound insulation in a naturally ventilated condition. A ventilation system was constructed by applying a silencer-type plenum structure, and a total of three design variables were selected: Ventilator height (H), Ventilator depth (D), and Opening height (h). The influence of sound insulation and ventilation performances according to individual design variables was analyzed using computational analysis after validating the prediction accuracy by the comparison with experimental data. As a result of the analysis assuming the application of 4 plenums in 84 ㎡ housing, to satisfy the minimum ventilation performance, an opening height of 30 mm and a device depth of 10 mm and the device height was insignificant. Finally, the noise-reducing natural ventilation system developed in this study was analyzed to be able to secure 25 dB of sound insulation performance by satisfying the acceptable ventilation performance when opened. It is expected that it can be used for noise reduction and natural ventilation in residential areas near roadsides.
외부소음 저감을 위한 자연환기형 플리넘 장치 설계인자 분석 연구
지원길(Ji, Won-Gil),양홍석(Yang, Hong-Seok),장서일(Chang, Seo-Il) 한국건축친환경설비학회 2020 한국건축친환경설비학회 논문집 Vol.14 No.2
Due to urbanization, traffic noise complaints are increasing in areas near roads, and urgent alternatives are required to provide a comfortable living environment for the people. In this study, a device that can be attached to the windows of apartment houses were studied to directly block the traffic noise at a building facade, by securing sound insulation in a naturally ventilated condition. A ventilation system was constructed by applying a silencer-type plenum structure, and a total of three design variables were selected: Ventilator height (H), Ventilator depth (D), and Opening height (h). The influence of sound insulation and ventilation performances according to individual design variables was analyzed using computational analysis after validating the prediction accuracy by the comparison with experimental data. As a result of the analysis assuming the application of 4 plenums in 84 ㎡ housing, to satisfy the minimum ventilation performance, an opening height of 30 mm and a device depth of 10 mm and the device height was insignificant. Finally, the noise-reducing natural ventilation system developed in this study was analyzed to be able to secure 25 dB of sound insulation performance by satisfying the acceptable ventilation performance when opened. It is expected that it can be used for noise reduction and natural ventilation in residential areas near roadsides.