Optimal position of air purifiers in elevator cabins for the improvement of their ventilation effectiveness

Bertolín, Luis Santamaría; Oro, Jesús Manuel Fernández; Díaz, Katia Argüelles; Vega, María Isabel Álvarez; Velarde-Suáréz, Sandra; Valle, María Elena del; Fernández, Luis Joaquín

doi:10.1016/j.jobe.2022.105466

Cited by 5 publications

(3 citation statements)

References 29 publications

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“…Dai and Zhao [11] emphasized the importance of properly arranging portable air cleaners (PACs) in indoor environments to reduce the risk of COVID-19 transmission through the air, and they provided a simple and easy-to-use model to guide the placement strategy of PACs in actual engineering projects. Luis et al [12] studied the impact of the varying positions and orientations of air purifiers on the ventilation efficiency and air age within elevator cabins. The results demonstrate that selecting the optimal position can significantly improve ventilation efficiency.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Impact on Indoor Air Quality: The Combined Use of Air Conditioners, Air Purifiers, and Fresh Air Systems

Jia,

Ge,

Wang

et al. 2024

Buildings

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As concerns about indoor air quality increase, air purifiers and fresh air systems are increasingly being used in conjunction with air conditioners in office buildings. To study the synergistic effects of multisystem joint operation on indoor air quality, this study used a combination of experimental and simulation methods to study the indoor particulate matter with a diameter of less than 2.5 µm (PM2.5) and carbon dioxide (CO2) concentrations under different operation conditions. The purification time and the PM2.5 concentration distribution under different conditions were compared with the condition in which the purifier was used alone. The results showed that the purification time required for the condition that the air conditioner runs together with the purifier was shortened by 15.2%. When the fresh air system is running together with the purifier, the purification time can be reduced by 30.4%. It was reduced by 32.6% when the three systems were operating at the same time. The PM2.5 concentration distribution under the joint operating condition was much more even than that under the condition in which the purifier was running alone. To analyze the impact on the CO2 distribution, the CO2 distributions under different joint operations were compared. The results show that the fresh air system can effectively dilute CO2 below 1000 ppm in 30 min. The air conditioner and purifier could help to mix the indoor air to provide a much more uniform indoor CO2 distribution.

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Section: Introductionmentioning

confidence: 99%

Synergistic Impact on Indoor Air Quality: The Combined Use of Air Conditioners, Air Purifiers, and Fresh Air Systems

Jia,

Ge,

Wang

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…In most cases, however, it is left to the users to determine how to position and operate the air purifiers according to their specific demands. Studies [5][6][7][8][9] reveal that the positioning of air purifiers may have a significant effect on their efficacy due to the interactions between the air jets from air purifiers and the background ventilation airflow in the room. An experimental measurement by Na et al [5] in a classroom showed that an improperly placed air purifier can increase the PM concentration by 278% in localised regions.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, they argue that the use of air purifiers to control the spread of COVID-19 should be approached with caution. Bertolín et al [7] investigated the use of air purifiers to mitigate COVID-19 transmission in elevator cabins, finding that although optimal positioning can improve ventilation, a good choice of air purifier flow rate is more critical to ensure an adequate air turnover.…”

Section: Introductionmentioning

confidence: 99%

Portable Air Purifiers’ Predicted Efficacy in Mitigating Airborne Pathogen Transmission in an Office Room Featuring Mixing Ventilation

Li,

Patel,

Cole

2023

Fluids

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Portable air purifiers have been extensively used to improve indoor air quality and mitigate the transmission of airborne diseases. However, the efficacy of mitigation is strongly affected by the interactions between jet flows of processed air from the air purifiers and the background airflows driven by the ventilation system. Critical factors in this context include the position and capacity of air purifiers and the ventilation rate of the heating ventilation and air-conditioning (HVAC) system. These factors are investigated in this study via computational fluid dynamics (CFD) simulations and the infection probability for different scenarios is quantified using the latest airborne infection predictive model incorporating recent pathological and clinical data for SARS-CoV-2. The results show that the use of air purifiers can significantly reduce the concentration of particulate matter, thus contributing to a generally lower risk of airborne transmission. However, the position of air purifiers affects their overall efficacy remarkably. Comparatively, a central HVAC system is more efficient at removing airborne particles under an equivalent ventilation rate assuming it uses a mixing ventilation scheme.

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Static and dynamic airflow and contaminant transport in a full-scale elevator-lobby mockup

Du,

Chen

2024

Sustainable Cities and Society

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Optimal position of air purifiers in elevator cabins for the improvement of their ventilation effectiveness

Cited by 5 publications

References 29 publications

Synergistic Impact on Indoor Air Quality: The Combined Use of Air Conditioners, Air Purifiers, and Fresh Air Systems

Synergistic Impact on Indoor Air Quality: The Combined Use of Air Conditioners, Air Purifiers, and Fresh Air Systems

Portable Air Purifiers’ Predicted Efficacy in Mitigating Airborne Pathogen Transmission in an Office Room Featuring Mixing Ventilation

Static and dynamic airflow and contaminant transport in a full-scale elevator-lobby mockup

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