Simulation Analysis of Particulate Hazardous Substance Transmission Patterns According to Ventilation Conditions in a Mid-Corridor Type Daycare Center

Purpose: Ventilation in buildings is an important factor for discharging harmful substances indoors and introducing fresh air. Recently, respiratory infectious diseases such as COVID-19 have occurred on a large scale in daycare centers, and problems caused by air propagation of respiratory viruses have emerged seriously. Method: Therefore, in this study, the real-time propagation characteristics of particulate harmful substances during natural ventilation in mid-corridor type daycare center was evaluated through CFD simulations. In addition, a proposal to improve natural ventilation and an application plan for mechanical ventilation was proposed, and the improvement effect were evaluated. Result: In mid-corridor type buildings, simulations results on natural ventilation conditions through window opening and through window and door opening showed that indoor particulate harmful substances can be spread to other rooms depending on external wind and wind conditions during natural ventilation. Therefore, the need for stable indoor air quality management was confirmed through sufficient mechanical ventilation in mid-corridor type buildings.