| Title |
Seasonal Contribution of Indoor generated- and Outdoor Originating PM2.5 to Indoor Concentration Depending on Airtightness of Apartment Units |
| Authors |
Park, Bo Ram ; Choi, Dong Hee ; Kang, Dong Hwa |
| DOI |
https://doi.org/10.5659/JAIK_SC.2020.36.2.155 |
| Keywords |
PM2.5; Source Contribution; Apartments housing unit; Airtightness; CONTAM |
| Abstract |
Indoor airborne particles are consisted of outdoor- and indoor-generated particles, which can be characterized by their compositions, generation
features and toxicity. The identification of source contribution of indoor and outdoor origin to indoor particles is important to understand
PM2.5 transport in a building as well as its impact on occupant health. The objective of this study is to investigate seasonal source
contribution to indoor PM2.5 concentration depending on airtightness of apartment units. To evaluate the source contribution, particle transport
including penetration, generation, exfiltration in an apartment housing unit was simulated by using CONTAM with particle and airflow
simulation parameters obtained from field measurements. The result showed that the outdoor source contribution to indoor air was relatively
dominant in the leaky housing unit during spring (77.2%) and winter (73.9%), and the indoor source was dominant in the airtight housing
unit during summer (60.3%) and fall (60.7%). These results indicate the seasonal health risk of indoor PM2.5 can be varied according to
airtightness of apartment units. |