As society progresses and the economy develops, people's demands for residential and industrial buildings are increasing. According to statistics, people spend 70% to 90% of their lives indoors, making it of great significance to create a comfortable, healthy, safe, and energy-efficient indoor environment. The challenge lies in how to create a more comfortable, healthy, and safe indoor environment without increasing or even significantly reducing building energy consumption. Since air movement is the most critical factor determining the distribution of heat, humidity, and pollutants indoors, it plays a pivotal role in fostering a safe, healthy, energy-efficient, and comfortable indoor environment. Therefore, studying the laws governing indoor air movement, particularly the distribution patterns of indoor parameters resulting from different airflow organizations, has become the core aspect of enhancing indoor environmental quality and energy-saving effectiveness.
Project Introduction: A newly constructed public building project in China
Simulation Area: The atrium's large open space area within the project
Boundary Conditions:
- Thermal radiation from the atrium's glass roof.
- Natural ventilation openings from the second to third floors.
- Indoor human heat sources.
- Air-permeable gaps in the top roof.
Simulation Objective: To assess indoor air movement and airflow organization patterns.
Stack Ventilation: Stack ventilation arises from the temperature difference between indoor and outdoor air, known as the "chimney effect." Due to this temperature difference, a density difference occurs, leading to a pressure gradient along the vertical direction of the building's walls. When indoor temperatures are higher than outdoor, the upper part of the building experiences higher pressure, while the lower part experiences lower pressure. Air enters through windows or doorways at the bottom and exits through skylights or light wells at the top.
