시간활동양상에 따른 주택의 시간대별 실내·실외 초미세먼지 농도비

Indoor to Outdoor Ratio of Fine Particulate Matter by Time of the Day in House According to Time-activity Patterns

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.