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CFD 해석을 이용한 출입문 개폐와 인체이동에 따른 음압격리병실에서의 오염물질 유출량 분석
조성민(Jo, Seong-Min),김기훈(Kim, Gi-Hoon),성민기(Sung, Min-Ki) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.10
Recent outbreak of Middle East Respiratory Syndrome(MERS) in KOREA, brought up the public demands for preventing infectious diseases. To fulfill the demands, KOREA Ministry of Health and Welfare(MOWH) and Centers for Disease Control and Prevention(CDC) are working on increasing the number of Negative Pressure Isolation Ward(NPIW) in hospitals. NPIW prevents air migration from ward by maintaining different pressure with adjacent areas. However, previous studies have shown that air migration can be observed in situation of door openings. In this study, different door opening speed and human movement were simulated with Computational Fluid Dynamics(CFD) to observe air migration from NPIW. Total four cases were simulated which differs from each other by door open/close speed and human movement. Result showed that faster door opening speed can reduce air migration due to the total opening duration of the door. The cases with human movement involved, showed higher air migration because the air migrated father to the anteroom with the human. As a result, short duration of the door opening and closing is recommended and when medical staff enters of leaves the ward, they should take few moments before they move to adjacent area.
실측과 전산유체역학을 이용한 해인사 장경판전의 보존환경 분석
조성민(Jo, Seong-Min),방종일(Bang, Jong-Il),여명석(Yeo, Myoung-Souk),성민기(Sung, Min-Ki) 한국건축친환경설비학회 2017 한국건축친환경설비학회 논문집 Vol.11 No.1
The objective of this study is to analyze the conservational environment of the Janggyeong Panjeon. World heritage Janggyeon Panjeon is wood block collection of Buddhist texts which has been preserved over 770 years. The Library (Bubbojeon, Sudarajang) of Jannggyeon Panjeon was built in 1398 and has taken part in protecting and preserving the wood blocks. In this study, temperature, humidity was analyzed and airflow was measured to analysis the current conservation environment. Computational Fluid Dynamics(CFD) simulation was conducted to observe the ventilation efficiency of the library. The field measurement and CFD result shows that the current ventilation method is providing good conservational environment to the wood blocks.
방종일(Bang, Jong-Il),조성민(Jo, Seong-Min),성민기(Sung, Min-Ki) 대한건축학회 2018 大韓建築學會論文集 : 構造系 Vol.34 No.1
Recently, concentration of fine and ultra-fine particulate matter(PM) has been increased in KOREA. The increase of PM in KOREA is due to increase of domestic industries and yellow dust from china. PM is known to cause diseases such as dyspnoea, asthma, arrhythmia. Since PM is harmful to human, KOREA Ministry of Environment(ME) warns people to stay indoors when the outdoor PM concentration is high. However, prior studies has shown that indoor PM concentration can be relatively high when outdoor PM concentration is high due to infiltration of PM into buildings though leakage areas. In this study, airtightness, indoor and outdoor pressure difference and PM 2.5 & 10 concentration were measured in an apartment complex to observe PM infiltrating into building. Field measurement was conducted in newly-built apartment buildings to avoid the influence of indoor PM which can be generated by residents. The airtightness test was conducted to identify the leakage areas of the apartment, such as electric outlets and supply/exhaust diffusers. The airtightness test result showed that the air leakage area of the building was dominant in buildings envelop. According to indoor and outdoor pressure difference measurement result and PM concentration measurement result, it can be concluded that outdoor PM can infiltrate into indoor by leakage areas when wind is blown toward the apartment. As a result, pressure difference formed by the external weather condition and architectural characteristics such as the airtightness in building can influence PM to infiltrate into buildings. In further studies, I/O ratio, stack-effect, infiltration and penetration factor will be considered.