在没有机械通风的教室中对远紫外线和空气清洁技术的CFD评估
Seongjun Park1, Gen Pei2, Richard Mistrick1
1Architectural Engineering Department, Pennsylvania State University, University Park, PA, USA.
Journal of hazardous materials
|September 6, 2025
概括
安装在天花板上的远紫外线系统和空气净化器有效地减少教室中的空气病原体. 然而,仔细考虑臭氧 (O3) 生产和空气净化器的性能对于保持室内空气质量至关重要.
科学领域:
- 室内空气质量和公共卫生
- 光催化和消毒技术
- 计算流体动力学 (CFD) 建模
背景情况:
- 通过空气传播的病原体在通风不良,占用空间,如教室中存在重大风险.
- 远紫外线 (远紫外线) 和空气清洁剂是缓解空气传播疾病的潜在解决方案.
- 优化这些系统的配置和性能对于有效的病原体控制至关重要.
研究的目的:
- 在课堂环境中评估和比较各种远紫外线系统和空气清洁剂的消毒效率.
- 评估与远紫外线系统相关的臭氧 (O3) 形成及其缓解.
- 确定空气净化器所需的清洁空气输送率 (CADR),以实现显著的暴露降低.
主要方法:
- 使用计算流体动力学 (CFD) 模拟来模拟空气流,病原体分散和污染物度.
- 模拟了安装在天花板,楼层和墙壁上的远紫外线系统的不同配置.
- 评估了各种空气净化器的安置情况,并评估了碳过器对臭氧去除的影响.
主要成果:
- 与其他配置相比,安装在天花板上的远紫外线系统显示出更高的病原体减少效果 (高达30%).
- 远紫外线系统使呼吸区的臭氧度增加了0.1-0.6ppb.
- 在天花板上安装的空气净化器是最有效的,比其他安装方式减少了多达20%的暴露量;至少需要1020 m3·h-1的CADR来减少50%的暴露量.
- 碳过器可以减少30%的臭氧暴露.
结论:
- 优化远紫外线系统的放置,特别是安装在天花板上的配置,可以加强病原体控制.
- 让紫外线消毒的好处与潜在的臭氧副产品形成的平衡对于课堂安全至关重要.
- 空气净化器的性能高度依赖于放置,需要足够的CADR来显著减少暴露.
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