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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.
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.
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.