Using air curtains to reduce short-range infection risk in consulting ward: A numerical investigation

Jin, Youngeup; Qian, Hua; Ma, Jianchao; Zhou, Rong; Zheng, Xiaohong

doi:10.1007/s12273-020-0649-7

Cited by 35 publications

(15 citation statements)

References 27 publications

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“…Proper operation control such as a coordinated mode of cooktop-range hood-window might be useful improve performance of a range hood. Meanwhile, air curtain technology was also developed to mitigate exposure to air pollutants in a kitchen [23], as well as infection risk in a hospital [24].…”

Section: Potential Measures To Reduce Air Pollution In Kitchensmentioning

confidence: 99%

Emission characteristics of formaldehyde from natural gas combustion and effects of hood exhaust in Chinese kitchens

Zheng

Zhang

Qian

et al. 2022

Science of The Total Environment

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Section: Potential Measures To Reduce Air Pollution In Kitchensmentioning

confidence: 99%

Emission characteristics of formaldehyde from natural gas combustion and effects of hood exhaust in Chinese kitchens

Zheng

Zhang

Qian

et al. 2022

Science of The Total Environment

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“…An important factor of CFD modelling for examining the airborne transmission in indoor built environments is the effect of turbulence motion on the pathogen spread and mean flow field. In the literature, the most of the relevant CFD studies are based on Reynolds-Averaged Navier Stokes (RANS) models (Satheesan et al 2020 ; Tao et al 2020 ; Wang et al 2020 ; Ye et al 2020 ; Zhang et al 2020a ) for treating turbulence, and only several Large Eddy Simulation (LES) studies (Berrouk et al 2010 ; Liu and You 2011 ; Tian et al 2007 ; Vuorinen et al 2020 ; Zhang et al 2019 ) have been conducted the previous decades, however, an increasing number of new LES articles due to the SARS-CoV-2 pandemic period is published, as well as an integrated DNS approach for the prediction of cough/sneeze flows by Diwan et al ( 2020 ).…”

Section: Computer Modelling Of Particles and Biological Agents’ Airbo...mentioning

confidence: 99%

Airborne transmission of biological agents within the indoor built environment: a multidisciplinary review

Argyropoulos

Skoulou

Efthimiou

et al. 2022

Air Qual Atmos Health

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The nature and airborne dispersion of the underestimated biological agents, monitoring, analysis and transmission among the human occupants into building environment is a major challenge of today. Those agents play a crucial role in ensuring comfortable, healthy and risk-free conditions into indoor working and leaving spaces. It is known that ventilation systems influence strongly the transmission of indoor air pollutants, with scarce information although to have been reported for biological agents until 2019. The biological agents’ source release and the trajectory of airborne transmission are both important in terms of optimising the design of the heating, ventilation and air conditioning systems of the future. In addition, modelling via computational fluid dynamics (CFD) will become a more valuable tool in foreseeing risks and tackle hazards when pollutants and biological agents released into closed spaces. Promising results on the prediction of their dispersion routes and concentration levels, as well as the selection of the appropriate ventilation strategy, provide crucial information on risk minimisation of the airborne transmission among humans. Under this context, the present multidisciplinary review considers four interrelated aspects of the dispersion of biological agents in closed spaces, (a) the nature and airborne transmission route of the examined agents, (b) the biological origin and health effects of the major microbial pathogens on the human respiratory system, (c) the role of heating, ventilation and air-conditioning systems in the airborne transmission and (d) the associated computer modelling approaches. This adopted methodology allows the discussion of the existing findings, on-going research, identification of the main research gaps and future directions from a multidisciplinary point of view which will be helpful for substantial innovations in the field.

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“…The rapid spread of SARS-CoV-2 infections and the associated high morbidity during the COVID-19 pandemic have attracted significant attention worldwide (Desai et al 2021;Dong et al 2021;Kong et al 2021;Liu et al 2021a;Srivastava et al 2021;Ren et al 2022b). In addition to SARS-CoV-2, many infectious diseases (e.g., influenza and tuberculosis) are associated with airborne particulate matter transmission, since the pathogens are contained in respiratory particles (Wang et al 2019;Satheesan et al 2020;Dai and Zhao 2020;Ye et al 2021;Liu et al 2021b;Liu et al 2022;Mckeen and Liao 2022). Recent studies have suggested that the wake flow generated by human walking has a significant effect on indoor flow field distribution and particle transmission (Hang et al 2014;Liu et al 2020;Lv et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Robustness of ventilation systems in the control of walking-induced indoor fluctuations: Method development and case study

Ren

Kong

et al. 2022

Build. Simul.

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Walking-induced fluctuations have a significant influence on indoor airflow and pollutant dispersion. This study developed a method to quantify the robustness of ventilation systems in the control of walking-induced fluctuation control. Experiments were conducted in a full-scale chamber with four different kinds of ventilation systems: ceiling supply and side return (CS), ceiling supply and ceiling return (CC), side supply and ceiling return (SC), and side supply and side return (SS). The measured temperature, flow and pollutant field data was (1) denoised by FFT filtering or wavelet transform; (2) fitted by a Gaussian function; (3) feature-extracted for the range and time scale disturbance; and then (4) used to calculate the range scale and time scale robustness for different ventilation systems with dimensionless equations developed in this study. The selection processes for FFT filtering and wavelet transform, FFT filter cut-off frequency, wavelet function, and decomposition layers are also discussed, as well as the threshold for wavelet denoising, which can be adjusted accordingly if the walking frequency or sampling frequency differs from that in other studies. The results show that for the flow and pollutant fields, the use of a ventilation system can increase the range scale robustness by 19.7%-39.4% and 10.0%-38.8%, respectively; and the SS system was 7.0%-25.7% more robust than the other three ventilation systems. However, all four kinds of ventilation systems had a very limited effect in controlling the time scale disturbance.

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Using air curtains to reduce short-range infection risk in consulting ward: A numerical investigation

Cited by 35 publications

References 27 publications

Emission characteristics of formaldehyde from natural gas combustion and effects of hood exhaust in Chinese kitchens

Emission characteristics of formaldehyde from natural gas combustion and effects of hood exhaust in Chinese kitchens

Airborne transmission of biological agents within the indoor built environment: a multidisciplinary review

Robustness of ventilation systems in the control of walking-induced indoor fluctuations: Method development and case study

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