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성민기(Sung. Min-Ki),전연성일(Seiich Tabuch),이중훈(Lee. Joong-Hoon),이승민(Lee. Seung-Min) 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1
The purposes of this study were to compare the sampling methods between the active air sampler and the passive air sampler and analyze the emission rates of formaldehyde and volatile organic compounds from building materials as a factor to the indoor air concentrations. Air temperature, relative humidity and ventilation rate by PFT method were measured simultaneously. The relation of ventilation rates and emission rates to air concentration were discussed.
순환식 멀티존 공조방식이 적용된 병동의 부유균 확산 및 제거
성민기(Sung Min-Ki) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(계획계)
This study shows the prevention of the microbial contamination using air filters and in-duct ultraviolet germicidal irradiation (ID-UVGI) in a hospital where multi-zone air handling units (AHUs) were being operated for multiple ward areas. The results of monitoring the microbial contamination showed that the airborne microbes were assumed to be eliminated by both air filters and the UVGI system at the same time. The UVGI system was more effective for removing the surface microbes rather than airborne bacteria passing through air filters according to the result of surface microbes monitoring. Appropriate combination of air filters and UVGI system is assumed to be effective for preventing microbial contamination in hospital buildings.
성민기(Min-Ki Sung),권순박(Soon-Bark Kwon) 한국생활환경학회 2015 한국생활환경학회지 Vol.22 No.2
The purpose of this study is to investigate the thermal environment of subway stations in Seoul and to suggest ways to improve the thermal environment and cooling energy during summer time. Major thermal environmental indexes were measured in six subway stations of three transit stations during summer time. The temperatures and relative humidities over the design conditions were observed in many concourses and platforms of the subway stations and the thermal environments of platforms were comparatively worse than concourses in most stations. Predicted Mean Vote(PMV) values were ranged over 1, which indicates “slightly warm”, in almost all stations. The air temperatures of subway stations during non-operating hour were up to 6.6°C higher than outdoor air, which presumably caused by the thermal storage during day time. The high enthalpy of subway station during non-operating hour is assumed to provide bad thermal environments to passengers in the early morning and also to cause more cooling energy during morning rush hour. Pre-cooling using low-enthalpy outdoor air before the early morning operation should be considered to improve thermal comfort and to save cooling energy even during summer time.
각층 공조방식이 적용된 병실에 있어서 공기오염의 확산 및 제거
성민기(Min-Ki Sung),카토신스케(Shinsuke Kato),김종훈(Jong-Hun Kim) 한국생활환경학회 2012 한국생활환경학회지 Vol.19 No.1
This study verified the hazard of contaminant dispersion using an experiment in a hospital where multi zone variable air volume (VAVs) systems were being operated for multiple ward areas. The results showed that the contaminant released in a source ward was dispersed to all other wards through the air conditioning system, although the concentration were decreased through dilution with outdoor air. Then airborne bacteria and fungi were measured in the ward area where was occupied by patients. The results indicated that the sources of airborne microbes were in the ward and they were assumed to be patients. However, the microbes were successfully removed by the air filters in the air conditioning system before supplied to each ward. Further consideration on the methods to minimize the airborne dispersion before removed in air conditioning systems is required.
클린룸 공조용 기화식 가습기를 대상으로 한 자외선 살균 효과
성민기(Sung Min-Ki),Kato Shinsuke,김민식(Kim Min-Sik) 한국건축친환경설비학회 2011 한국건축친환경설비학회 학술발표대회 논문집 Vol.2011 No.10
Evaporative humidifiers have been reported to have problem with microbial contamination. This study verified the microbial contaminations of an evaporative humidifier and investigated the germicidal effects and limitations of ultraviolet germicidal irradiation systems. The results showed apparent reduction of microbial contamination, but also there remained room for improvement to sterilize the inside of humidifier elements.
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.
공기 정화 식물 설치 위치와 에어컨 가동 여부에 따른 학교 교실의 미세먼지 감소율 비교
조예림(Jo, Ye-Lim),성민기(Sung, Min-Ki) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.2
Exposure to high concentration of particulate matter(PM) is associated with adverse health effects. Students are more sensitive to the high concentrations of particle in school facilities because they live in school most of the day. Recently, researches using plants and computational fluid dynamics programs(CFD) are actively conducted to reduce particle concentration and identify particle spread. Accordingly, this study analyzed particle removal efficiency according to the location of model and whether air conditioners are running in classroom, through CFD simulation. As a result, early in the analysis, the removal rate was higher if the plant was installed centrally, and 3600 seconds later at the corner, and 5.1%, 9.0% higher at the center and corner when the air conditioner was operated.
필터가 장착된 열회수형 환기장치의 미세먼지 제거 성능 실험
조예림(Jo, Ye-Lim),성민기(Sung, Min-Ki) 대한건축학회 2021 대한건축학회논문집 Vol.37 No.10
Recently, the importance of filters used in mechanical ventilation systems has been increasing in Korea due to a surge in the concentration of pollutants in the atmosphere. The filter should be tested for performance and then issued a test report in accordance with specifications, and the performance test is currently conducted exclusively by the filter. However, air purifiers and ventilation systems are designed to allow filter replacement, so when a filter is installed, there is a possibility of leakage due to a gap between the machine and the filter. Because the particle removal efficiency of the filter is affected by various factors as well as leakage, it is not possible to know the exact filter performance without considering these. Accordingly, this study measured filter performance when filters were installed in ventilation systems in operation. Three other ventilation systems were used for the experiment, and test results and the test reports were compared to the particle size used for the performance test. As a result, all three models were less efficient than test reports, and three additional experiments were conducted in accordance with KS specifications to determine the cause of these errors. Experiments show that the filter efficiency itself is likely to be problematic, but there are several differences between the field test methods and the KS specification. Therefore, it is deemed necessary to conduct performance verification in a similar environment after minimizing these differences and emphasized the need for a new performance test specification to verify removal efficiency when used in the field by installing filters on mechanical ventilation systems.