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In hot and humid climate regions, exterior shading devices are widely employed to reduce cooling loads and improve daylighting in buildings. While their effects on thermal comfort and energy performance have been extensively studied, limited research has addressed how these devices influence natural ventilationNatural ventilation and indoor particulate matter (PM) deposition. This study investigates PM deposition patterns in a multi-story building equipped with horizontal louvered shading under natural cross ventilation. The building is divided into zones based on floors, row units, and corridors. Using computational fluid dynamics (CFD) simulationsComputational Fluid Dynamics (CFD) simulation based on the realizable k-ε turbulence model, the study evaluates the airflow field and particle deposition velocity for PM sizes ranging from 0.1 to 2.5 μm, under various wind directions and louver angles. Results show that as particle size increases, deposition velocity also increases, with 0.1 μm particles being most sensitive to airflow variation. Deposition tends to concentrate around doors, windows, and corners. Notably, different wind directions significantly affect spatial deposition patterns for 0.1 μm particles, with greater non-uniformity observed when louvers are located on the leeward side. These findings offer new insights into the interactions between shading design, ventilation, and indoor pollutant behavior, providing a reference for optimizing shading systems to balance energy efficiency and indoor air quality.

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Particulate Matter Deposition on the Interior Surfaces of Louver-Shaded Building with Cross Ventilation

  • 会议论文

  • 发表日期：

    2026年

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  • Jianwen Zheng,
  • Qiuhua Tao,
  • Zhixian Hong,
  • Han Wang

摘要

In hot and humid climate regions, exterior shading devices are widely employed to reduce cooling loads and improve daylighting in buildings. While their effects on thermal comfort and energy performance have been extensively studied, limited research has addressed how these devices influence natural ventilationNatural ventilation and indoor particulate matter (PM) deposition. This study investigates PM deposition patterns in a multi-story building equipped with horizontal louvered shading under natural cross ventilation. The building is divided into zones based on floors, row units, and corridors. Using computational fluid dynamics (CFD) simulationsComputational Fluid Dynamics (CFD) simulation based on the realizable k-ε turbulence model, the study evaluates the airflow field and particle deposition velocity for PM sizes ranging from 0.1 to 2.5 μm, under various wind directions and louver angles. Results show that as particle size increases, deposition velocity also increases, with 0.1 μm particles being most sensitive to airflow variation. Deposition tends to concentrate around doors, windows, and corners. Notably, different wind directions significantly affect spatial deposition patterns for 0.1 μm particles, with greater non-uniformity observed when louvers are located on the leeward side. These findings offer new insights into the interactions between shading design, ventilation, and indoor pollutant behavior, providing a reference for optimizing shading systems to balance energy efficiency and indoor air quality.