通风策略对上层室紫外线杀菌辐射 (UVGI) 系统在学习环境中的性能的影响
Seongjun Park1, Richard Mistrick2, William Sitzabee3
1Department of Architectural Engineering, Pennsylvania State University, United States of America.
The Science of the total environment
|July 19, 2023
概括
上层室的杀菌辐射 (UVGI) 有效地降低了空气传播病毒的风险. 优化通风和空气混合可显著提高UVGI消毒性能在被占用室内空间,如教室.
科学领域:
- 环境卫生工程 环境卫生工程
- 室内空气质量管理室内空气质量管理
- 传染病控制和控制传染病
背景情况:
- 上层室的紫外线杀菌辐射 (UVGI) 显示出减轻空气传播病毒传播的前景.
- 将通风策略与UVGI消毒功效联系起来的定量数据很少.
- 了解这些相互作用对于有效的室内感染控制至关重要.
研究的目的:
- 调查不同通风策略如何影响课堂上空气流和UVGI消毒性能.
- 评估通风速率和空气混合对UVGI病毒失活的影响.
- 为优化占用建筑物的UVGI系统设计提供见解.
主要方法:
- 使用了三维计算流体动力学 (CFD) 模拟.
- 模拟包括各种冷却,加热和通风场景.
- 分析的重点是空气流模式和UVGI消毒效率.
主要成果:
- 通过混合风扇提高空气循环,在最低通风率 (1.1小时-1) 上提高了UVGI性能,特别是在排位冷却和全空气加热中.
- 增加的空气混合对强迫对流冷却下的UVGI疗效的影响很小.
- 随着通风效率接近统一,UVGI的有效性增加.
- 房间平均空气速度>0.1 m/s 实现了对1-10 μm气溶的90%的消毒.
结论:
- 通风策略和空气混合显著影响上层室UVGI系统的性能.
- 对于UVGI系统的设计,应考虑通风,占用和空气混合,以便在占用空间中获得最佳效果.
- 实现高通风效率是最大化UVGI消毒的关键.
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