Effect of low-cost recirculating portable air filtration on aerosol particle deposition and concentration in a conference room: Experiment, theory, and simulation comparison

Li, Linhao; He, Ruichen; Kong, Min; Eilts, Stephanie M.; Hong, Jiarong; Hogan, Christopher; Pope, Zachary

doi:10.1016/j.jaerosci.2022.106048

Cited by 8 publications

(2 citation statements)

References 37 publications

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“…PAC operates in different opening configurations, and the distribution of droplets deposited on the head, body of susceptible person and table is shown in figure 17. The deposition of particles may not be negligible in small spaces as shown by the observations of Li et al [48]. Therefore, the analysis of droplet deposition is necessary.…”

Section: The Influence Of the Opening Configuration Of Pac On Droplet...mentioning

confidence: 99%

Effectiveness of portable air cleaners in mitigating respiratory virus transmission risk

Li,

Kong,

Cheng

et al. 2024

Phys. Scr.

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Portable air cleaners (PACs) have shown promising potential in reducing the risk of SARS-CoV-2 infection by effectively removing pollutant particles and optimizing airflow patterns. This study focused on a simulated scenario where an infected source and a susceptible person engage in conversation within a naturally ventilated room. By combining the Eulerian fluid method with the Lagrangian particle tracking model, a comprehensive insight into indoor airflow patterns and the dispersion of virus-laden droplets was gained. As deposited droplets may be resuspended or in contact thereby increasing the potential risk of infection, the deposition of droplets of different sizes in different susceptible areas was also specifically analyzed. The impacts of three variables, namely the configuration of the PAC’s opening, air flow rate, and positioning, on the transmission of virus-laden droplets were investigated. The results highlighted the significant role of PAC utilization in effectively capturing droplets emitted by the infected source and reducing virus concentration in the vicinity of the susceptible person, thereby mitigating the risk of transmission. Notably, the design and orientation of the suction opening emerged as crucial factors. Among the various cases studied, the optimal control and prevention performance against the virus was achieved with a virus concentration reduction rate of 97.4% when the PAC had an opening configuration with a larger single-sided suction opening facing the infected source, an airflow rate of 200 m³/h, and was positioned at the center of the tabletop between the infected source and the susceptible person. This research underscored the importance of employing PACs with appropriate settings to enhance indoor air quality and minimize the potential for SARS-CoV-2 transmission in similar scenarios.

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Section: The Influence Of the Opening Configuration Of Pac On Droplet...mentioning

confidence: 99%

Effectiveness of portable air cleaners in mitigating respiratory virus transmission risk

Li,

Kong,

Cheng

et al. 2024

Phys. Scr.

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“…24,25 A number of studies have reported the application of PF units to a variety of indoor settings. [26][27][28][29] It is important to note that the effectiveness of an air purifying system for a given application will depend on its location and properties. 30 PF devices designed for point-source decontamination have recently been used to reduce airborne concentrations of volatile organic compounds (VOCs) emitted from electrosurgical plume 31 and bone cement fumes.…”

Section: Introductionmentioning

confidence: 99%

Removal of indoor aerosol particles generated in a medically relevant space using a portable airborne particle filtration device

Carroll,

Kirschman

2023

Indoor and Built Environment

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Aerosol generating procedures expose operating room personnel to pathogens. Applying localized negative pressure within the proximity of a patient’s airway is expected to reduce the amount of bioaerosols dispersed within the vicinity of a healthcare worker applying an aerosol generating procedure. Nebulized saline was used as a proxy for bioaerosols and was produced with an aerosol generator placed near the centre of a simulated operating room. A particle counter was placed nearby to detect aerosols and determine their size distribution. A portable filtration unit was placed at fixed distances from the site of aerosol emittance to reduce the concentration of aerosols. In the presence of vacuum at distances of 10, 20, 30 and 40 cm from the site of aerosol emittance, the reduction in the average concentrations of 0.5, 0.7, 1.0 and 3.0 μm particles relative to the control ranged from 87 to 99% depending on the distance and particle size. The efficiency of particle capture was dependent on the distance of the vacuum inlet to the aerosol outlet. At all distances tested, significant aerosol reduction was observed ( p < 0.05), indicating that the portable filtration unit has the potential to increase safety without contacting the patient.

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Reducing direct exposure to exhaled aerosol through a portable desktop fan

Rasam,

Gentile,

Tronville

et al. 2024

Atmospheric Environment: X

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Effect of low-cost recirculating portable air filtration on aerosol particle deposition and concentration in a conference room: Experiment, theory, and simulation comparison

Cited by 8 publications

References 37 publications

Effectiveness of portable air cleaners in mitigating respiratory virus transmission risk

Effectiveness of portable air cleaners in mitigating respiratory virus transmission risk

Removal of indoor aerosol particles generated in a medically relevant space using a portable airborne particle filtration device

Reducing direct exposure to exhaled aerosol through a portable desktop fan

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