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공동주택 내 곰팡이 오염 진단 기법 구축을 위한 동절기 및 하절기 현황 조사
방종일(Bang, Jong-Il),김기훈(Kim, Gi-Hoon),조성민(Jo, Seong-Min),성민기(Sung, MinKi) 한국건축친환경설비학회 2017 한국건축친환경설비학회 논문집 Vol.11 No.1
Recently airborne contaminants such as PM10, PM2.5 have increased. Such outdoor air contaminants can infiltrate buildings through cracks or openings and cause respiratory and skin diseases to occupants. Airborne mold, also known to cause respiratory diseases, can be increased both by indoor and outdoor sources. However, researches on indoor mold contamination are still not enough and the guidelines for mold diagnosis and remediation were not introduced yet in Korea. In this study, the investigation on indoor and outdoor airborne molds and related factors such as life pattern, indoor wall surface pH and water content, indoor temperature and relative humidity was conducted in apartment buildings on summer and winter and the relationship between them was observed to eventually introduce the mold diagnosis guideline for apartment buildings in Korea. The result showed that indoor airborne mold concentrations were affected by outdoor concentration and life pattern such as ventilation frequency can also increase indoor airborne mold.
방종대(Bang, Jong-Dae),손정락(Sohn, Jeong-Rak),송상훈(Song, Sang-Hoon),류옥현(Ryu, Ok-Hyun),박동균(Park, Dong-Gun),김기현(Kim, Ki-Hyun) 대한건축학회 2012 大韓建築學會論文集 : 構造系 Vol.28 No.11
Direct construction delivery method was introduced for cost reduction of residential building by the government. Direct construction delivery method is based on, literally, the direct contract between owner and special contractors without involvement of a general contractor. The owner conducts the role of a general contractor as well as owner’s original responsibility while construction works being executed by special contractors. This delivery method has never been performed in the past. Therefore both owner and special contractors have not been their experiment, also relevant legal system does not developed to conduct construction project efficiently. Therefore this paper aimed to figure out the problems and improve the current status in issuing relevant legal system for the efficient direct construction delivery method. To achieve purpose of this research was collected data at the pilot project of direct construction and interviewed with the supervisors and construction managers. And the improvement plan was established based on implications from them.
러시아 군사혁신이 한국의 국방혁신 4.0에 주는 시사점: 아서 리케의 군사전략 이론 관점에서
방종관 ( Bang Jonggoan ) 한국국가전략연구원 2022 한국국가전략 Vol.7 No.3
Arthur Lykke argued that military strategy consists of three elements: final ends, ways, and means. The concept of operational performance of military innovation corresponds to 'ways', and weapons systems, auxiliary structures, and command culture correspond to 'means'. Based on this, Russian military innovation was analyzed from the perspective of individual elements and the balance between elements. In addition, the implications for Korean Defense Innovation 4.0 are summarized into the following five. The first step in military innovation is to clearly set the 'Ends' based on threat analysis. Second, it is necessary to develop the 'concept of operation performance' that conforms to Korean characteristics. Third, technology is the 'catalyst' for military innovation. 'Technology planning' is important. Fourth, completeness is important for force structures. Fifth, intangible combat power is the starting point and end point of military innovation. We hope that these implications will help the successful promotion of Korean Defense Innovation 4.0.
추적가스실험과 CFD 해석을 통한 병원 내 외래구역의 공기감염균 확산 방지를 위한 연구
방종일(Bang, Jong-Il),성민기(Sung, Minki) 대한건축학회 2023 대한건축학회논문집 Vol.39 No.10
In KOREA, since the COVID-19 Pandemic, medical facilities have been strictly controlled for the purpose of controlling infectious diseases by revising the medical law. However, there is a need to examine the possibility of control and prevention of airborne infectious diseases at medical facilities actually operated. In this study, SF6 (Sulfur hexafluoride) tracer gas experiments were conducted to observe the spread of airborne infections in the outpatient area. SF6 gas concentration was measured under conditions of 100% outdoor air intake mode and air recirculation mode. SF6 gas concentration was not detected in the consultation room where the outdoor air inlet was 100%. However, when the air recirculation mode was activated, SF6 gas spread to the HVAC system and SF6 gas was detected in the feed diffuser and the consulting room. In addition, the design airflow in the outpatient area was very different from the airflow in actual operation. As a result of the CFD analysis, it is judged that the supply air volume is larger than the exhaust air volume. The results of the CFD analysis with increasing exhaust volume showed that it was able to prevent the outflow to the outside sufficiently. Therefore, it is necessary to adjust the exhaust amount so that the outpatient area is formed into a negative pressure so as not to be leaked to the outside. In addition, studies on the removing of pollutants controlled by negative pressure should be conducted. Consequently, to properly prevent the transmission of infectious diseases, it is necessary to control the air flow in the outpatient area and consider a suitable control methods including filter, UVGI, air cleaner etc.
환기장치를 대상으로 한 405 nm LED 모듈의 부유 및 표면 미생물 저감 성능 평가
방종일(Bang, Jong-Il),김지희(Kim, Ji-Hi),최안섭(Choi, An-Seop),성민기(Sung, Min-Ki) 한국건축친환경설비학회 2020 한국건축친환경설비학회 논문집 Vol.14 No.6
Microbial damage and contamination in apartment buildings causes respiratory and skin diseases to occupants and may cause aesthetic damage to buildings. Remedying microbial damage in apartment buildings requires a lot of time and money, expertise and the process is complex. In this study, the possibility of microbial control was confirmed by applying the 405 nm LED module to the ventilation system for apartment buildings. The ventilation system has been used for one year, and the contamination condition was confirmed visually. A 405 nm LED module developed for ventilation systems was installed on the OA side to confirm the reduction effect of airborne microorganisms from outdoor air and the microbial contamination that may occur inside the ventilation system. The airborne icroorganisms were sampled from the outside air and supply air diffuser. Also, the surface microorganisms were observed by sampling from the Pre, HEPA filter and the heat exchange element surface. In terms of the overall reduction rate, surface bacteria were reduced by 45% and surface mold by 90% after the LED was irradiated for 3 weeks. In the case of airborne microorganisms, both bacteria and mold were reduced by 71%. The heat exchange efficiency was 95% on average before and after LED module installation. Therefore, it was confirmed that microorganism control is possible with an LED module using 405 nm visible light, but long-term irradiation is required.