Field investigation of pollutant characteristics and targeted ventilation control strategies in high-ceiling aircraft spraying workshop

Zhao, Lijuan; Liu, Junjie; Yuan, Yin; Pei, Jingjing; Xiao, Wu; Zhang, Haiqiao; Wei, Shen

doi:10.1016/j.psep.2022.01.016

Cited by 11 publications

(2 citation statements)

References 67 publications

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“…25 Additionally, in most public buildings, such as offices, schools and public transportation, the ventilation rate is usually not sufficient for economic purposes. 26,27 More importantly, ventilation via dilution cannot effectively control the shortdistance transmission dominated by airborne particles exhaled by infected humans. 28 Air purifiers, as an active air purification technology, are used to provide clean air and could effectively reduce indoor infection risk in confined spaces.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of airborne transmission of COVID virus between occupants in a confined room with an air purifier

Wang

et al. 2023

Indoor and Built Environment

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This study evaluated the effect of ventilation rate and air supply angle of an air purifier using computational fluid dynamics to determine the dispersion of airborne COVID virus exhaled by an infected person. The risk of infection for an occupant was determined based on the virus concentration in the active area and accumulated particle dose within the breathing zone by varying the ventilation parameters. The air purifier was found to provide a local dilution and would block the development of an expiratory jet for a short time to reduce transmission risk. Compared to the case without an air purifier, the maximum reductions were 94.27% in the accumulated dose and 53.2% in the particle count concentration. In the breathing area, the larger air supply angle (90° > 60° > 30°) is better when the ventilation rate was 27.0 m3/h and 40.5 m3/h. Otherwise, 60° air supply angle is preferable where the ventilation rate was 54.0 m3/h. Assessing the results with the grey relational analysis revealed that the relational degree for particle count concentration was greater by varying the ventilation rate than by varying the air supply angle. However, the relational degree according to the accumulated dose was greater by varying the air supply angle than by increasing the ventilation rate. These findings may provide an important control strategy to effectively mitigate the risk of infection in a confined room by using an air purifier.

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Section: Introductionmentioning

confidence: 99%

Mitigation of airborne transmission of COVID virus between occupants in a confined room with an air purifier

Wang

et al. 2023

Indoor and Built Environment

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“…Spray coating has been studied extensively in various industrial fields. Paint materials are spray-coated on large products, such as automobiles [1,2], ships [3,4], and airplanes [5]. Polymers are spray-coated on semiconductor wafers [6,7] and solar cells [8] using a similar technology.…”

Section: Introductionmentioning

confidence: 99%

Behaviors of Bubbles Trapped in Film Coating during Spray Gun Coating and Its Influences on Coating Defects

Noguchi,

Yano,

Amagai

2023

Coatings

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In this paper, we investigated the behaviors of bubbles entrained in a film coating during spray coating. Air bubbles that remain in a film coating after diluent evaporation cause coating defects called bubbling defects, including fish-eye and crater defects. In this study, the visualization of a film coating revealed that smaller bubbles in the film shrank slowly and disappeared, while larger bubbles remained. These remaining bubbles grew during the heating process for the drying of the film coating. The shrinking phenomenon was explained using bubble dynamics based on the Young–Laplace equation of a bubble’s inner pressure and Henry’s law for bubble gas dissolution into the film coating. This shrinking model is often used in studies on microbubble dynamics. The results suggested the importance of avoiding the entrainment of large bubbles during the spraying process and enhancing the release of air bubbles from the film coating’s surface through the appropriate usage of defoaming agents.

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Cooperative and Bifunctional Adsorbent‐Catalyst Materials for In‐situ VOCs Capture‐Conversion

Mondal,

Aina,

Rownaghi

et al. 2024

ChemPlusChem

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Volatile organic compounds (VOCs) are gases that are emitted into the air from products or processes and are major components of air pollution that significantly deteriorate air pollution and seriously affect human health. Different types of metals, metal oxides, mixed‐metal oxides, polymers, activated carbons, zeolites, MOFs and mixed‐matrixed materials have been developed and used as adsorbent or catalysts for diversified VOC capture, removal, and destruction. In this comprehensive review, we first discuss the general classification of VOC removal materials and processes and outline the historical development of bifunctional and cooperative adsorbent‐catalysts for the removal of volatile organic compounds (VOCs) from air. Subsequently, particular attention is devoted to design strategies for cooperative adsorbent‐catalysts, along with detailed discussions on the latest advances on these bifunctional materials, reaction mechanisms, long‐term stability, and regeneration for VOCs removal processes. Finally, challenges and future opportunities for the environmental implementation of these bifunctional and cooperative adsorbent‐catalysts are identified and outlined with the intent of providing insightful guidance on the design and fabrication of more efficient materials and systems for VOCs removal in the future.

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Field investigation of pollutant characteristics and targeted ventilation control strategies in high-ceiling aircraft spraying workshop

Cited by 11 publications

References 67 publications

Mitigation of airborne transmission of COVID virus between occupants in a confined room with an air purifier

Mitigation of airborne transmission of COVID virus between occupants in a confined room with an air purifier

Behaviors of Bubbles Trapped in Film Coating during Spray Gun Coating and Its Influences on Coating Defects

Cooperative and Bifunctional Adsorbent‐Catalyst Materials for In‐situ VOCs Capture‐Conversion

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