Luo Hao, Zhong Lexuan
Department of Mechanical Engineering, University of Alberta, 9211-116 Street NW, Edmonton, AB, T6G 1H9, Canada.
Build Environ. 2021 Jun 15;197:107852. doi: 10.1016/j.buildenv.2021.107852. Epub 2021 Apr 6.
The rapid increase in global cases of COVID-19 illness and death requires the implementation of appropriate and efficient engineering controls to improve indoor air quality. This paper focuses on the use of the ultraviolet germicidal irradiation (UVGI) air purification technology in HVAC ducts, which is particularly applicable to buildings where fully shutting down air recirculation is not feasible. Given the poor understanding of the in-duct UVGI system regarding its working mechanisms, designs, and applications, this review has the following key research objectives:•Identifying the critical parameters for designing a UVGI system, including the characterization of lamp output, behavior of the target microbial UV dose-response, and evaluation of the inactivation performance and energy consumption.•Elucidating the effects of environmental factors (air velocity, air temperature, and humidity) on the UVGI system design parameters and optimization of the in-duct UVGI design.•Summarizing existing UVGI system designs in the literature and illustrating their germicidal and energy performance in light of COVID-19 mitigation.
全球新冠肺炎病例和死亡人数的迅速增加，要求实施适当且高效的工程控制措施，以改善室内空气质量。本文重点关注暖通空调（HVAC）风道中紫外线杀菌辐照（UVGI）空气净化技术的应用，该技术特别适用于无法完全关闭空气再循环的建筑物。鉴于人们对风道内UVGI系统的工作机制、设计和应用了解不足，本综述具有以下关键研究目标：
确定设计UVGI系统的关键参数，包括灯输出特性、目标微生物紫外线剂量反应行为，以及灭活性能和能耗评估。
阐明环境因素（风速、气温和湿度）对UVGI系统设计参数的影响，以及风道内UVGI设计的优化。
总结文献中现有的UVGI系统设计，并根据缓解新冠肺炎疫情的情况说明其杀菌和能源性能。
