Evaluation of different air distribution systems in a commercial airliner cabin in terms of comfort and COVID-19 infection risk

Liu, Mingxin; Liu, Junjie; Cao, Qing; Li, Xingyang; Liu, Sumei; Ji, Shengcheng; Lin, Chao–Hsin; Wei, Daniel; Xiong, Shuidong; Long, Zhengwei; Chen, Qingyan

doi:10.1016/j.buildenv.2021.108590

Cited by 38 publications

(28 citation statements)

References 53 publications

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“… Contrast type Application scenarios Thermal comfort PD PMV PPD Draft rate Floor-to-ceiling temperature difference Overall thermal sensation and comfort MV vs. DV Office DV<10%, MV<20% [ 143 ] – DV<20%, MV<20% [ 143 ] Summer: DV < MV Winter: DV > MV [ 19 ] – – Classroom DV<10%, MV<20% [ 143 ] – DV<20%, MV> 20% [ 143 ] – – – Retail shop DV<10%, MV<20% [ 143 ] – DV<20%, MV> 20% [ 143 ] – – – Industrial workshop DV>25%, MV>25% [ 143 ] – DV<20%, MV> 20% [ 143 ] – – – Aircraft cabin MV<1%, DV: 3%–8% [ 144 ] – – MV: 10%–40%, DV: 1%–5% [ 144 ] – – MV vs. DV vs. SV Office – – …”

Section: Achievements Challenges and Opportunities In Ventilation Modesmentioning

confidence: 99%

A review of different ventilation modes on thermal comfort, air quality and virus spread control

Fan

Wang

et al. 2022

Building and Environment

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In the era of Corona Virus Disease 2019 (COVID-19), inappropriate indoor ventilation may turn out to be the culprit of microbial contamination in enclosed spaces and deteriorate the environment. To collaboratively improve the thermal comfort, air quality and virus spread control effect, it was essential to have an overall understanding of different ventilation modes. Hence, this study reviewed the latest scientific literature on indoor ventilation modes and manuals of various countries, identified characteristics of different ventilation modes and evaluated effects in different application occasions, wherefore to further propose their main limitations and solutions in the epidemic era. For thermal comfort, various non-uniform ventilation modes could decrease the floor-to-ceiling temperature difference, draft rate or PPD by 60%, 80% or 33% respectively, or increase the PMV by 45%. Unsteady ventilation modes (including intermittent ventilation and pulsating ventilation) could lower PPD values by 12%–37.8%. While for air quality and virus spread control, non-uniform ventilation modes could lower the mean age of air or contaminants concentration by 28.3%–47% or 15%–47% respectively, increase the air change efficiency, contaminant removal effectiveness or protection efficiency by 6.6%–10.4%, 22.6% or 14%–50% respectively. Unsteady ventilation mode (pulsating ventilation) could reduce the peak pollutant concentration and exposure time to undesirable concentrations by 31% and 48% respectively. Non-uniform modes and unsteady modes presented better performance in thermal comfort, air quality and virus spread control, whereas relevant performance evaluation indexes were still imperfect and the application scenarios were also limited.

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Section: Achievements Challenges and Opportunities In Ventilation Modesmentioning

confidence: 99%

A review of different ventilation modes on thermal comfort, air quality and virus spread control

Fan

Wang

et al. 2022

Building and Environment

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“…Both systems provided acceptable thermal comfort. Recently, Liu et al 125 experimentally compared the effectiveness of displacement ventilation and mixing ventilation in removing an airborne virus generated by a passenger in a cabin mock‐up. They determined that the risk of COVID‐19 infection for passengers under the displacement ventilation without mask wearing was equivalent to that with the traditional mixing system with masks.…”

Section: Efforts To Improve the Cabin Air Environmentmentioning

confidence: 99%

Recent progress on studies of airborne infectious disease transmission, air quality, and thermal comfort in the airliner cabin air environment

et al. 2022

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According to the International Air Transport Association, 1 air transportation was a very popular mode of travel in 2019, as 4.5 billion people flew to various destinations around the world. However, the COVID-19 pandemic placed air travel on hold in 2020, when only 1.8 billion passengers flew, a decrease of 60.2% from the previous year.The worst month was April 2020, when airlines experienced a 94% reduction in passenger capacity worldwide. 2 A study by Boeing 3 showed that the global risk of COVID-19 transmission during air travel was 1 in 1.7 million. However, other studies have reported an attack rate of 9.7% to 62%. 4,5 The flying public has reasonable doubts about the ability of modern airliners to protect them from infection by airborne diseases such as COVID-19. Airborne infectious diseases are not the only source of concern for the flying public. Cabin air quality has become a very popular topic for research. The National Research Council in the United States 6 conducted a comprehensive review of the airliner cabin air

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“…Researchers resort to various fluid mechanics models to assess the transport and dispersion of viral particles. An example is the Computational Fluid Dynamics (CFD) method, which has been used to study airborne disease transmission in enclosed environments, including aircraft cabins [ 22 ], buses [ 23 ], movie theatre [ 24 ], and multi-family residential buildings [ 25 ]. Alternative models, such as the zonal airflow network model, originally developed to assess heat and moisture content inside buildings [ 26 ], have been used to simulate the movement of contaminant and airborne pathogens in enclosed environments.…”

Section: Relevant Workmentioning

confidence: 99%

Airborne transmission of the Delta variant of SARS-CoV-2 in an auditorium

Huang

Hao

Liu

et al. 2022

Building and Environment

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Evaluation of different air distribution systems in a commercial airliner cabin in terms of comfort and COVID-19 infection risk

Cited by 38 publications

References 53 publications

A review of different ventilation modes on thermal comfort, air quality and virus spread control

A review of different ventilation modes on thermal comfort, air quality and virus spread control

Recent progress on studies of airborne infectious disease transmission, air quality, and thermal comfort in the airliner cabin air environment

Airborne transmission of the Delta variant of SARS-CoV-2 in an auditorium

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