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유정연(Jungyeon Yu),송수원(Suwon Song),조정식(Chungsik Cho),이윤규(Yunqyu Lee) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-
This paper analyzed the results of indoor air quality (IAQ) measurements for a total of 283 daycare centers in 2018. The measured IAQ types are 10 pollutants(CO2, TVOC, Radon, HCHO, CO, NO2, Mold, total airborne bacteria, PM10 and PM2.5) corresponding to the maintenance and recommendation standards of the Enforcement Rules of IAQ. The standards were revised twice on Oct. 18, 2018 and Feb. 13, 2019, and the standards were tightened for PM10 and PM-2.5. The measurements results show that the indoor conditions of the daycare centers met the 2018 criteria of IAQ in most pollutants items. However, for the post-revision criteria, PM10 exceeded the standard of 8% and PM-2.5 exceeded the standard of 9% for day care centers. Therefore, it is necessary to drive additional improvements for such daycare centers in order to meet the criteria of the revised IAQ standards to be enforced in July of 2019.
열회수형 환기장치의 미세먼지 집진효율 평가 및 개선방안
유정연(Jungyeon Yu),배상환(Sanghwan Bae) 한국생태환경건축학회 2024 한국생태환경건축학회 논문집 Vol.24 No.1
Purpose: In this study, the actual pollutions(fine dust) collection efficiency of ventilation systems applied to buildings was evaluated. The cause of internal leakage was identified using PIV, and through this, a direction for improving the performance of ventilation systems and an effective test method for removing pollutants were proposed. Method: A pollutant collection efficiency evaluation system composed of indoor and outdoor chambers of ventilation equipment was established, and performance evaluation was performed on two types of small ventilation equipment that are generally applied to daycare centers and apartment houses. The actual fine dust collection efficiency was evaluated for two types of ventilation systems equipped with HEPA air filters, which are generally applied to daycare centers and apartment houses. Result: As a result of the evaluation of the fine dust collection efficiency of the ventilation system, in the case of product A, which has a relatively large amount of leakage around the air filter inside the ventilation system, the fine dust collection efficiency for PM2.5 was 58 %, and it was evaluated that it largely fell short of the physical performance standard of the HEPA filter. On the other hand, in the case of product B, which improved the amount of leakage by improving the internal case details of the ventilation system, the fine dust collection efficiency for PM2.5 was 91%. It was confirmed that the fine dust collection efficiency of model B was significantly improved compared to model A.
조정식(Chungsik Cho),유정연(Jungyeon Yu),송수원(Suwon Song),이윤규(Yungyu Lee) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-
There has been growing interest in fine dust and also concerning about the following problems, such as the limitation of outdoor activities, the anxiety about indoor air quality, and the health problems of the respiratory system. The socioeconomic impacts of the pollution can not be ignored especially for the elderly people who are classified as a health-vulnerable group. This analyzed the measurement results of indoor air quality (IAQ) for a total of 94 elderly care facilities in a city and also suggested maintenance plans for such elderly care facilities. The measurements results show that the indoor conditions of elderly care facilities met the 2018 criteria of IAQ in most pollutants items, but for the post-revision criteria, PM10 exceeded the standard of 12% and PM-2.5 exceeded the standard of 20% for elderly care facilities. In addition, it was reported that the concentration of other pollutants such as fungi, NOx, and VOCs are relatively high in elderly care facilities. Therefore, it is recommended to implement the maintenance plans suggested in this study to improve overall IAQ as well as to meet the requirements of the revised IAQ standards in 2019 for elderly care facilities.
송수원(Suwon Song),유정연(JungYeon Yu),조정식(ChungSik Cho),이윤규(YunGyu Lee) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-
This study analyzed the concentration reduction effects of particulate matters (e.g., PM10 and PM2.5) and indoor air pollutants (e.g., CO2, TVOC, Radon) according to the operation conditions of an air-cleaner and natural ventilation through windows in a small office. As results, the daily average concentrations of PM10 and PM2.5 decreased into 0.2 μg/m3 from 1.6 μg/㎥ when the air-cleaner was in operation along with all windows closed during holidays. Under the conditions of natural ventilation with the windows opened during weekdays, the concentrations of Radon significantly decreased up to 0.2 pCi/ℓfrom 3.7 pCi/ℓ. However, the daily average concentrations of PM10 increased almost double up to 74.7 μg/㎥ from 30.5 μg/㎥ and PM2.5 increased up to 40.9 μg/㎥ from 21.5 μg/㎥ as well even though the air-cleaner was in operation. Consequently, when it comes to improving indoor air quality, it is important to timely operate ventilation (natural or mechanical) systems as well as air-cleaner(s) depending on the concentrations of measured indoor and outdoor air pollutants.
어린이집 및 노인요양시설 환기시스템 가동에 따른 실내공기질 분석
송수원(Suwon Song),유정연(JungYeon Yu),이윤규(YunGyu Lee) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.11
본 연구에서는 다중이용시설인 어린이집 및 노인요양시설을 대상으로 환기시스템 가동에 따른 실시간 실내공기질 모니터링데이터 (CO₂, TVOC, Radon)를 분석하였다. 결과적으로 분석 대상 어린이집의 경우 재실밀도가 높아 주간에 이산화탄소(CO2)농도가 대부분 유지기준(1000 ppm)을 초과하였으며 야간에는 라돈(Radon)의 농도가 최대 100 Bq/㎥ 까지 상승하였다. 또한, 전열교환기를 24 시간 가동한 경우에 라돈의 농도는 40% 감소하였으나, 재실인원에 비하여 환기 풍량이 부족하여 CO₂ 농도 감소효과는 크게 나타나지 않았다. 노인요양시설의 경우 주로 야간에 CO₂와 TVOC 농도가 실내공기질 유지기준 (CO₂ 1000 ppm) 및 권고기준 (TVOC 400 ㎍/㎥)을 초과하였으며, 실제 배기 덕트의 풍량이 부족하여 배기팬의 가동으로 인한 CO₂와 TVOC 농도의 감소 효과는 크게 나타나지 않았다. 따라서 어린이집 및 노인요양시설의 실내공기질을 개선하기 위해서는 먼저, 인당 필요 환기량을 바탕으로 적정한 용량의 환기시스템이 설치되고 유지관리 되어야 하며, 지속적으로 실내오염물질의 유형 및 농도를 모니터링 하여 자연환기 및 기계환기를 적절히 혼합하여 가동할 필요가 있다.