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KMID : 1156220200460050504
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Journal of Environmental Health Sciences
2020 Volume.46 No. 5 p.504 ~ p.512
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Indoor to Outdoor Ratio of Fine Particulate Matter by Time of the Day in House According to Time-activity Patterns
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Park Jin-Hyeon
Kim Eun-Chae
Choe Young-Tae
Ryu Hyoen-Su
Kim Sun-Shin
Woo Byung-Lyul
Cho Man-Su
Yang Won-Ho
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Abstract
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Objective: The purpose of this study was to evaluate the indoor to outdoor ratio (I/O ratio) of time activity patterns affecting PM2.5 concentrations in homes in Korea through a simulation.
Methods: The time activity patterns of homemakers were analyzed based on the ‘Time-Use Survey’ data of the National Statistical Office in 2014. From September 30 to October 2, 2019, the experimenter lived in multi?family housing located in Guro-gu, Seoul. The I/O ratio of PM2.5 concentration was measured by installing sensor-based instruments.
Results: The average indoor and outdoor PM2.5 concentrations during the three days were 33.1±48.9 and 45.9±25.3 μg/m3 , respectively. The average I/O ratio was 0.75±0.60. The indoor concentration tended to increase when PM2.5 source activity such cooking and cleaning was present and outdoor PM2.5 was supplied through ventilation.
Conclusions: This study could be used as basic data for estimating indoor PM2.5 concentrations with personal activity pattern and weather conditions using outdoor concentrations.
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KEYWORD
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Fine particulate matter, indoor air quality, indoor to outdoor ratio, time-activity pattern
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