低温等离子装置用于暖通空调系统风道中细菌气溶胶灭活的实验评估。

IF 4.3 3区 环境科学与生态学 Q1 CHEMISTRY, ANALYTICAL
Yang Lv, Xiaodong Wang, Beibei Wang and Wenjie Yuan
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引用次数: 0

摘要

鉴于人们对室内空气质量和病原体传播的日益关注,本研究旨在评估低温等离子体(LTP)装置对暖通空调系统风道中细菌气溶胶的灭活效果,探索提高空气净化效率的方法。这项研究采用实验方法探索了低温等离子体对大肠杆菌和枯草杆菌等常见细菌的灭活效果,重点研究了气流速率、相对湿度和温度等空气参数对设备性能的影响作用。值得注意的是,研究确定 LTP 设备的工作电压为 3000 V,结合低气流、低湿度和高温条件,可显著提高细菌气溶胶的灭活率,在负离子浓度为 2.4 × 1011 离子/立方米和风速为 3 m s-1 时,灭活率达到 82%。尽管产生了臭氧和紫外线等副产品,但其浓度在人体接触的安全范围之内。此外,这项研究还确定了有效的灭活范围,以及管道内气流方向的最佳布置,以最大限度地提高 LTP 设备的灭菌效率。鉴于这些令人鼓舞的结果,该研究提倡将 LTP 技术集成到公共建筑暖通空调系统的空气管道中,以改善空气质量,降低空气传播疾病的风险。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Experimental assessment of low temperature plasma devices for bacterial aerosol inactivation in the air duct of HVAC systems

Experimental assessment of low temperature plasma devices for bacterial aerosol inactivation in the air duct of HVAC systems

Experimental assessment of low temperature plasma devices for bacterial aerosol inactivation in the air duct of HVAC systems

In light of growing concerns about indoor air quality and the transmission of pathogens, this study aims to evaluate the effectiveness of low temperature plasma (LTP) devices in inactivating bacterial aerosols in the air duct of HVAC systems, exploring methods to enhance air purification efficiency. This research employed experimental methods to explore the deactivation effects of LTP on common bacteria such as E. coli and Bacillus subtilis, focusing on the role of air parameters such as the airflow rate, relative humidity, and temperature in influencing the device's performance. Notably, the study determined that an operational voltage of 3000 V for the LTP device, combined with conditions of low airflow, low humidity, and high temperature, significantly enhances the inactivation of bacterial aerosols, achieving an 82% inactivation rate at a negative ion concentration of 2.4 × 1011 ions per m3 and a wind speed of 3 m s−1. Despite the generation of ozone and ultraviolet light as by-products, their concentrations were found to be within safe limits for human exposure. In addition, this study identified an effective inactivation range, alongside an optimal arrangement for the airflow direction within ducts, to maximize the sterilization efficiency of the LTP device. Given these promising results, the study advocates for the integration of LTP technology into the air duct of HVAC systems of public buildings to improve air quality and reduce the risk of airborne disease transmission.

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来源期刊
Environmental Science: Processes & Impacts
Environmental Science: Processes & Impacts CHEMISTRY, ANALYTICAL-ENVIRONMENTAL SCIENCES
CiteScore
9.50
自引率
3.60%
发文量
202
审稿时长
1 months
期刊介绍: Environmental Science: Processes & Impacts publishes high quality papers in all areas of the environmental chemical sciences, including chemistry of the air, water, soil and sediment. We welcome studies on the environmental fate and effects of anthropogenic and naturally occurring contaminants, both chemical and microbiological, as well as related natural element cycling processes.
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