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评估HVAC空气流调节策略,以减少办公环境中的短期气溶传播
Mina A Saad1, Amr Hassan2, Ahmed Hanafy3
1Mechanical Engineering Department, College of Engineering and Technology, Arab Academy for Science, Technology and Maritime Transport, Alexandria, 60274446, Egypt. mina.saad@aast.edu.
Scientific reports
|July 4, 2025
概括
优化空气扩散器的放置可以显著减少空气中的病原体在咳后的传播. 将排气扩散器放置在源头上方,与物理距离一起,是室内空间中立即控制气溶的关键.
科学领域:
- 环境工程 环境工程
- 公共卫生 公共卫生
- 流体动力学 流体动力学
背景情况:
- 呼吸道病原体在空气中传播是一个主要的全球健康问题.
- 了解咳的早期气溶分散对于感染控制至关重要.
- 现有的研究往往忽视了特定的散发器放置对短时间气溶传播的影响.
研究的目的:
- 为了研究不同的空气扩散器位置如何影响咳后的早期气溶分散.
- 通过优化扩散器配置和物理距离来量化颗粒传播的减少.
- 为HVAC设计提供实用见解,以减轻空中传播风险.
主要方法:
- 使用了计算流体动力学 (CFD) 模拟.
- 使用了Eulerian-Lagrangian方法与离散阶段模型.
- 模拟分析了在各种空气分配设置下滴滴传输,蒸发和原子核度.
主要成果:
- 传统的平行排气系统在控制传染性核的横向传播方面存在局限性.
- 将废气扩散器放置在咳源的上方,可将侧面颗粒的传播减少约40%.
- 在早期分散过程中,保持两米的距离可以将颗粒度降低82-89%.
结论:
- 扩散器的放置对于控制咳后立即短时间的颗粒分散至关重要.
- 优化通风策略,结合身体距离,可以有效地减少近场暴露风险.
- 结果为机械通风办公环境中的HVAC设计提供了实际指导,以提高安全性.
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