격리병실내 급배기구 위치에 따른 오염물 제거효율 비교

원안나,Won, An-Na 인천대학교 도시과학연구원 2020 도시과학 Vol.9 No.2

The Recently, several countries have been affected by respiratory diseases, resulting in renewed research interest in their prevention and control. One such example was the 2015 outbreak of Middle East Respiratory Syndrome (MERS) in South Korea and COVID-19. In this study, we performed experiments and simulations based on concentration decay using CO2 as the tracer gas to elucidate the pollutant-removal efficiency for different inlet and exhaust locations and outdoor air-supply ratios. The wall inlet exhibited a higher pollutant-removal efficiency, owing to the upward movement of the air from the lower zone to the upper one. In conclusion, it is recommended that a total air-conditioning plan for isolation rooms be established as well as efficient system operation for pollutant removal and air-flow control to prevent the transmission of infections from the patients to others.

다중이용쇼핑공간의 공조최적제어를 위한 온열쾌적지표의 활용방법론 연구

원안나(An Na Won) 대한기계학회 2024 대한기계학회 춘추학술대회 Vol.2024 No.3

가정 부문에서의 에너지 절약 행위에 따른 전기에너지 절약 효과 분석

원안나(Won, An-Na),손병훈(Son, Byeung-Hun),홍원화(Hong, Won-Hwa) 대한건축학회 2013 대한건축학회논문집 Vol.29 No.8

With the improvement in economic power and diversification of living patterns, the demands of household energy-consumption devices have changed. The household energy consumption accounts for 20 percent of the entire energy consumption in Korea. Among household energy consumption, electric-power consumption is expected to increase as the number of household energy-consumption devices has been on the rise. The purpose of this work is to investigate the possibility of household energy saving through the "the way of reducing the use hours of devices and their use" as the other energy saving way than "choice of highly efficient devices". To achieve the purpose, this researcher conducted a questionnaire survey with 2,250 households in the country to look into the state of the possession and use of household energy-consumption devices. And we investigate into the energy-saving behavior. The results are as follows. First, A household possessed 16.21 household energy-consumption devices. when we are grouping by energy-saving behavior, there is no difference the numbers of energy-consumption devices. Two, group 1 can save energy-cost about 11,000won in the winter and 15,000won in the summer by energy-saving behavior.

다낭성 난소증후군의 난임치료에 대한 한약임상연구 경향 분석 -중국의 임상연구를 중심으로-

원안나 ( An Na Won ),최민선 ( Min Sun Choi ),김동일 ( Dong Il Kim ) 대한한방부인과학회 2014 大韓韓方婦人科學會誌 Vol.27 No.4

Objectives: The purpose of this study is to review the trend of chinese clinical studies of herbal treatment for infertility caused by Polycystic Ovary Syndrome (PCOS). Methods: We searched the clinical studies published from `` to ;0`` through CAJ (Chinese Academic Journal) with keywords of “PCOS and 不孕” or “多囊卵 巢綜合證and 不孕”. We analyzed the intervention type of clinical studies. In addition, We re-searched randomized controlled trials (RCTs) published from ;00 to ;0``, assessed the quality of RCTs using the Jadad Scale and reanalyzed the intervention type of RCTs. Results: One hundred and seventeen clinical studies were finally selected. Clinical studies of herbal treatment for infertility caused by PCOS increased remarkably after the ;000s in China. Combined herbal medicine and western medicine was used the most frequently. RCTs published from ;00 to ;0`` were fifty. Average of Jadad score of RCTs was ``.;. Combined herbal medicine and western medicine was also the most frequently used as intervention in RCTs. Conclusions: Clinical studies on effect of combined herbal medicine and western medicine for infertility caused by PCOS were mostly published in China. But Quality of studies was generally low. Further research on effect of herbal treatment for infertility caused by PCOS is needed.

국내 대형병원과 중 · 소규모 의원의 공기감염 확산 방지 대책의 비교 평가

안지원(Jiwon An),양영권(Young Kwon Yang),원안나(An-Na Won),황정하(Jung Ha Hwang),박진철(Jin Chul Park) 한국생활환경학회 2018 한국생활환경학회지 Vol.25 No.1

The purpose of this study is to compare and analyze the air infections in middle and small hospitals with the facilities of large national hospitals that have air-borne infection isolation (AII) wards through actual condition investigation and airflow analysis simulation (CFD) and to provide basic data for prevention. The method and scope of the study are as follows. First, through literature review, data related to prevention of infection spread in domestic medical institutions were investigated. Second, we conducted a survey on the status of isolation facilities to prevent the spread of infectious diseases in large hospitals and small and medium - sized clinics in Korea. Third, airflow analysis simulation (CFD) was carried out using the isolation ward of the nationally designated inpatient ward and the data of the plane and facility system of the small clinic. As a result of the study, it is found that regulations applicable to small and medium-sized clinics are insufficient. In addition, the simulation results show that the infectious disease virus is likely to spread to other patients in the hospital.

농촌 지역 독거노인 주택 유형에 따른 주거취약성 분석

이지애(Ji-Ae Lee),원안나(An-na Won) 한국생활환경학회 2021 한국생활환경학회지 Vol.28 No.6

South Korea has entered an aging society, and it is estimated that 33% of the total elderly population is a elderly single household. Currently, Social problems are emerging such as the death of individual loneliness among the elderly who have lower cognition about the physical environment than the youth in vulnerable housing environment. In particular, the elderly housing in rural areas has a higher rate of aging than in urban areas. If the housing is not improved, the rate of exposure to a more vulnerable housing environment is high. Therefore, the purpose of this study is to investigate the thermal environment of elderly housing in rural areas from September to November in the middle period, and to analyze the vulnerability of housing according to the housing type of elderly housing. In addition, we investigated the actual situation of housing in the elderly districts in rural areas where the safety of the elderly population was not ensured, and analyzed the housing vulnerability of elderly single households according to the level of housing. Based on this, we conducted research to collect basic data for the dissemination and application of devices that can secure a safety system for the elderly single households.

원내 감염 예방을 위한 비말 확산 분석 시뮬레이션

양영권(Yang, Young-Kwon),원안나(Won, An-Na),황정하(Hwang, Jung-Ha),박진철(Park, Jin-Chul) 한국생태환경건축학회 2018 한국생태환경건축학회 논문집 Vol.18 No.6

종합병원내 공기감염 예방을 위한 진료부와 로비공간의 기류 분석

송해은(Song, Hae-Eun),원안나(Won, An-Na),김성용(Kim, Seong-Yong),박진철(Park, Jin-Chul),황정하(Hwang, Jung-Ha) 한국건축친환경설비학회 2017 한국건축친환경설비학회 논문집 Vol.11 No.5

This study analyzes the types of space in the polyclinic and lobby spaces of hospitals, which are thought to be exposed to secondary airborne infections within hospitals. A hospital, which has space where the human traffic from the polyclinic overlaps with that of the lobby (space type II), was selected as the subject of this study. The air current distribution in the polyclinic and lobby areas are analyzed using the calculation program Star-ccm+. The air current distribution in the existing air-conditioned space is analyzed using T · A · B (Testing, Adjusting, Balancing) measured values. The result proved the possibility of secondary airborne infections caused by mixing of the air currents from the polyclinic and lobby in the upper and middle air layers. Five improvement suggestions in terms of changing the position of air inlets and outlets are proposed in this study. Among them, [ALT-3] the arrangement wherein outlets are placed on the first and third lines and inlets are placed on the second line is expected to significantly reduces the possibility of airborne infections, as the air currents in the lower, middle, and upper layers in the polyclinic and lobby spaces are not intermixed.

기류분석을 통한 종합병원(외래)진료부의 공기 감염 개선 연구

송용우(Yong Woo Song),원안나(An-Na Won),황정하(Jung-Ha Hwang),박진철(Jin Chul Park) 대한설비공학회 2019 설비공학 논문집 Vol.31 No.6

This study was conducted to investigate and possibly prevent airborne infection in general hospitals The CFD analysis of emergency and outpatient departments was summarized as follows; First, assessment on the first floor of the general hospital revealed that indoor exhaust air was not ejected in concurrence with the supply air, which could lead to an air shutdown. Second, CFD analysis confirmed the results of the actual survey that air congestion and inflow into other spaces may increase the probability of airborne infection. Third, the CFD analysis reflecting the improvement plan established that when the exhaust in the lobby was increased and the door was opened, there was difficulty in air control. When all the doors were closed, pressure differences occurred on the left and right sides of the lobby. Particularly, air flow may be stagnant in the stairwells and corridors, or an introduction of air in the lobby. Further installation of the front rooms, doors and exhaust outlets also enhanced the control of air flow between spaces, and flow through staircases and elevators. Therefore, it is thought that the separation of space and the proper location of exhaust could be the most effective way of controlling airflow in hospitals. In addition, it is necessary to put in place measures to reduce the possibility of airborne infection by applying each of the exhaust systems by space.

원내 공기감염 확산 방지를 위한 격리병실의 CFD 해석

양영권(Yang, Young Kwon),강인성(Kang, In Sung),원안나(Won, An-Na),황정하(Hang, Jung Ha),박진철(Park, Jin Chul) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.3

The present study is a foundational study for performance improvements on isolation wards to prevent proliferation of secondary infection of infectious diseases such as SARS, H1N1, and MERS inside hospitals. Accordingly, the present study conducted an analysis of the effect of sealing mechanisms and filling of openings on ensuring air tightness performance in isolation wards as well as simulation on air currents in improved isolation wards. The study method is as follows: first, previous studies on aerial infection types and mechanisms were reviewed and the review results were utilized as basic data for analysis of the simulation of air currents. Second, national and international legislations and regulations in relation to isolation wards as well as case studies on developed nations were investigated in order to identify the problems in isolation wards in Korea and improvement plans. Third, construction and facility plans were compared and analyzed between general and isolation wards focusing on large general hospitals in Korea thereby conducting comparison and analysis on the performance and effects of air-tightness of general and isolation wards through simulations(CFD). Fourth, an analysis on air currents in isolation wards specified in mandatory legislation (draft) from the Ministry of Health and Welfare such as fulfillment of isolation ward requirements including negative pressure isolation wards, areas of ward and intensive care units, and ensuring separation distance between sickbeds was conducted. The study result showed that isolation wards had better air-tightness performance than that of general wards and parallel bed layout was better than serial bed layout in terms of aerial infection substance proliferation. In addition, when a separation distance between sickbeds was 2m or wider, the risk of aerial infection became significantly lower.