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공기조화기 장착용 축상유입식 싸이클론의 압력손실에 대한 수치해석 및 실험적 연구
권순박,박덕신,조영민,김세영,김명준,김호중,김태성,Kwon, Soon-Bark,Park, Duck-Shin,Cho, Youngmin,Kim, Se-Young,Kim, Myeoung-Joon,Kim, Hojoong,Kim, Taesung 한국입자에어로졸학회 2009 Particle and Aerosol Research Vol.5 No.2
Particulate matter (PM) is one of the major indoor air pollutants especially in the subway station in Korea. In order to remove PM in the subway station, several kinds of PM removal system such as roll-filter, auto-washable air filter, demister, and electrostatic precipitator are used in the air handling unit (AHU) of subway stations. However, those systems are prone to operation and maintenance problems since the filter-regeneration unit consisting of electrical or water jet parts might malfunction due to the high load of particulates unless the filter medium is periodically replaced. In this study, the use of axial-flow cyclone was proposed for particulate filter unit in the AHU for its low operation and maintenance cost. Novel shape of axial-flow cyclone was designed by using computational fluid dynamics (CFD). The shape of vortex vane was optimized in terms of pressure drop and tangential velocity. In addition, CFD analysis was validated experimentally through the pressure drop measurement of mock-up model. We found that pressure drop and tangential velocity of fluid through the axia-flow cyclone was significantly affected by the rotating degree of vortex vane and the numerical prediction of pressure drop agreed well with experimental measurement.
권순박(Kwon Soon-Bark),김세영(Kim Se-Young),조영민(Cho Youngmin),박덕신(Park Duck-Shin),배광호(Bae Khwang-Ho),유건종(Yoo Gun-Jong),김정수(Kim Jung-Su) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
Air conditioning of subway cabin is achieved by two separate air conditioners installed on the top of the cabin. Cooling air is supplied through the line duct on the ceiling through the whole cabin indoor evenly, and the return air is exhausted to the center area of ceiling. Depending on the indoor air quality, outdoor air is introduced into the cabin. A part of air is pressurized out through the exhaust duct by the positive pressure condition of cabin indoor. However, cabin indoor is not always maintained in a positve pressure by frequent door opening during operation. Therefore, outdoor air can be introduced through exhaust fan and tunnel air, highly polluted by fine particles can cause a indoor air pollution. In this study, we measured air velocity, pressure difference, and particle concentration in order to reveal the inflow of outdoor air. We found that outdoor air was introduced during the subway acceleration by the inertial force of indoor air.
권순박(Soon-Bark Kwon),박덕신(Duck-Shin Park),조영민(Youngmin Cho),김종범(Jong-Bum Kim),조관현(Goan-hyun Cho),남궁석(Goongseok Nam),이주열(Jooyeol Lee),김태성(Taesung Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
More than 7 million persons use Seoul Metropolitan Subways (SMS) everyday and the number has been in increasing trend. With the increasing trend of concerns on indoor air quality(IAQ), the management of IAQ has become an important issue, especially in case of subway operators, because most of subway lines are placed underground with poor ventilation condition. The ultimate object of study develop independent cleaning device that reduce efficient fine particle and CO2. Urban subway has characteristics about proper clean air flow, must be installed in narrow space and maintenance cycle has enough time. Two layered electrically pre-charged filters were used for removing particulate matters and gas absorbers are packed between two layer filters for removing gases pollutants such CO₂, VOCs and HCHO. Urban subway has characteristics about proper clean air flow, must be installed in narrow space and maintenance cycle has enough time. SCAP prototype is producted as all in one method which decrease fine dust, CO₂ and noxious gas. and basic test carry out with quantity of wind, a gap of pressure, sampling efficiency.
권순박(Soon-Bark Kwon),박덕신(Duck-Shin Park),조영민(Youngmin Cho),박재형(Jae-Hyoung Park),김세영(Se-Young Kim),박은영(Eun-Young Park),김창수(Changsoo Kim),김기연(Ki-Youn Kim) 한국실내환경학회 2011 한국실내환경학회지 Vol.8 No.1
The objective of this study is to assess a level of microbial contamination in the KTX. Investigation sites in the KTX were cabin, gateway, toilet and passenger seat. It was found that the mean concentrations of airborne bacteria and fungi were 157 CFU/㎥ and 84 CFU/㎥ , respectively, in all of the investigation sites of the KTX. They did not exceed the domestic standard (800 CFU/㎥) for airborne bacteria and the guideline (150 CFU/㎥ ) for airborne fungi recommended by WHO. Mean levels of bacteria and fungi distributed in passenger seat were 2.6×105 cfu/㎥ and 3.7×104 cfu/㎥ , respectively. The predominant genera identified in the KTX were Bacillus, Corynebacterium, Staphylococcus and Micrococcus for bacteria and Aspergillus, Cladosporium and Penicillium for fungi, respectively. Based on identification result, the profiles of airborne bacteria and fungi in the KTX was wholly similar to those of bacteria and fungi distributed in the passenger seat.
도시철도 객실 공기정화장치(SCAP)의 운행차량 효율평가
권순박(Soon-Bark Kwon),박덕신(Duck-Shin Park),조영민(Youngmin Cho),김종범(Jong-Bum Kim),조관현(Goan-hyun Cho),남궁석(Goongseok Nam),이주열(Jooyeol Lee),김태성(Taesung Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
In the modern society various types of transportation mode are utilized among them the subway system is the one of the main transportation mode which more than 7.21 million people ride a day. Because of interests on the indoor air quality (IAQ) of underground public facilities concerns on IAQ of subway system by many people are increasing. There are several approach to improve IAQ of subway station such as installing platform screen door (PSD) frequent tunnel washing-out and etc however there has not been any attempt to improve IAQ of subway cabin inside. Most technologies for removing airborne particulate matters are known to be difficult to adopt on the subway cabin since the problem of maintenance cost. Therefore the ultimate object of this study is a practical development of cabin air cleaning system which can reduce the concentration of airborne particles and harmful gases at the same time. The subway cabin air purifier (SCAP) was developed for removing particulate matters and gases pollutants inside a cabin. The whole system was designed and the roll-filter device was manufactured based on numerical prediction results. It is expected that SCAP could reduce indoor air pollutants in the subway cabin practically and it can be applied to other part of transportation vehicles.
권순박(Soon-Bark Kwon),김세영(Seyoung Kim),김명준(Myungjoon Kim),박덕신(Duck-Shin Park),정우태(Wootae Jeong),김태성(Taesung Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
Management of indoor air quality of underground subway station is an important issue. The air handling unit (AHU) installed in the underground subway station is the main facility determining the air quality of station. Especially for removing particulate matters it is important to operate the appropriate air filter. In this study we studied particle collection efficiency of axail-flow cyclone for subway AHU. The particle collection efficiencies of axial-flow cyclones with three different outlet shape have been evaluated.
권순박(Kwon Soon-Bark),김세영(Se-Young Kim),신창헌(Chang-Heon Shin),배성준(Sung Joon Bae),황선호(Sun Ho Hwang),강중구(Choong-Ku Kang),김성환(Seong-Hwan Kim),김태성(Taesung Kim),김진호(Jin-Ho Kim) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
Management of indoor air quality of underground subway station is an important issue. The air handling unit (AHU) installed in the underground subway station is the main facility determining the air quality of station. Especially for removing particulate matters, it is important to operate the appropriate air filter. However, there is no quantitative test method for existing air filter in site. It is rarely known that the collection efficiency of air filter can satisfy the designed criteria or not. In this study, we set the reference method using the mini-volume air sampler inside the AHU to evaluate the collection efficiency of different types of air filters. In addition, we applied the portable instrument based on the light-scattering method to the efficiency test. The method we applied in this study can be used in the evaluation of air filter in site.