Investigation on the ventilation impact of enclosed-type teaching buildings under different aperture ratios and wind directions

Abstract

Enclosed-type of educational buildings, which are commonly seen in the campus nowadays, suffer from poor natural ventilation, causing higher energy consumption from mechanical ventilation as well as poorer indoor air quality. This study examines the natural ventilation performance of enclosed-type educational buildings in Qinhuangdao, China, with a focus on the effects of building aperture ratios and wind directions. The analysis considers aperture ratios ranging from 0% to 100% and wind angles from 0°to 180°, assessing wind velocity distribution and age of air within the rooms. The results indicate that natural ventilation is most effective when the aperture ratio is approximately 60%, which enhances space utilization and occupancy rates. Furthermore, aligning building openings with the prevailing wind direction optimizes ventilation efficiency. The study also reveals that ventilation performance varies across different room types and building locations, suggesting that strategic room arrangement can further improve ventilation outcomes. These findings highlight the importance of incorporating natural ventilation strategies in the early stages of architectural design, with potential benefits for energy conservation, indoor air quality, and public health.

Keywords

• enclosed-type
• educational buildings
• aperture ratio
• wind directions
• aoa (age of air)