Effect of flow structures on natural ventilation performance in office model.

Area of Science:

• Environmental Science
• Building Physics
• Indoor Air Quality

Background:

• The COVID-19 pandemic underscored the need for effective indoor ventilation.
• Natural ventilation offers a sustainable solution for improving air quality in occupied spaces.
• Understanding airflow dynamics is crucial for optimizing natural ventilation strategies.

Purpose of the Study:

• To experimentally evaluate the impact of window and door opening conditions on indoor ventilation performance.
• To quantitatively analyze the internal airflow structure influencing ventilation effectiveness.
• To identify key factors for enhancing natural ventilation in office environments.

Main Methods:

• Utilizing a wind tunnel to test an office model.
• Measuring ultrafine particulate matter concentrations under various opening conditions.
• Employing particle image velocimetry (PIV) for internal flow structure analysis.

Main Results:

• Ventilation performance and internal air velocity increased with larger window opening angles.
• The door's opening condition significantly influenced overall ventilation effectiveness.
• A correlation was established between airflow dynamics and ventilation efficiency.

Conclusions:

• Natural ventilation, particularly door configuration, plays a critical role in improving indoor air quality.
• Findings provide practical guidelines for optimizing natural ventilation in residential and workspace settings.
• This research contributes to creating healthier indoor environments through energy-efficient ventilation methods.