| Title |
Analysis of Airflow and Indoor Air Quality Characteristics by The Stack Effect in a High-rise Building |
| Authors |
Min Seong Kim ; Joo wook Kim |
| DOI |
https://doi.org/10.6110/KJACR.2024.36.1.44 |
| Keywords |
공기유동 네트워크; 에너지플러스; 고층건물; 실내공기질; 시뮬레이션; 연돌효과 Airflow Network; Energy-Plus; High-rise building; Indoor air quality; Simulation; Stack effect |
| Abstract |
Air currents in tall buildings are created both vertically and horizontally due to temperature variations and wind pressure. These currents cause temperature, humidity, CO2, and pollutants to move by the airflow patterns. This study identified the airflow patterns resulting from the stack effect in a tall building and subsequently examined indoor air quality. Temperature, humidity, CO2, and particulate matter levels were analyzed within the target building using the Airflow Network Simulation program, taking into consideration the presence or absence of the stack effect. The analysis revealed that humidity and CO2 concentrations were at their highest in the neutral zone, where airflow was minimal. Humidity collected in the upper part of the building through the shaft, resulting in elevated concentrations. The CO2 concentration distribution resembled that of the lower levels due to the inflow of air into the residential areas. In contrast, particulate matter exhibited lower concentrations in the neutral zone, mainly because of the limited airflow and reduced inflow into the indoor environment. Consequently, it is imperative to account for the stack effect to prevent humidity-related condensation and address air quality deterioration caused by the distribution patterns of particulate matter in tall buildings. This necessitates the implementation of an appropriate facility system tailored to the distribution of pollutants. |