The influence of air supply inlet location on the spatial-temporal distribution of bioaerosol in isolation ward under three mixed ventilation modes

被引：0
作者：
Liu Z. [1 ]
Wang T. [1 ]
Wang Y. [1 ]
Liu H. [1 ]
Cao G. [2 ]
Tang S. [3 ]
机构：
[1] Department of Power Engineering, North China Electric Power University, Hebei, Baoding
[2] Institute of Building Environment and Energy, China Academy of Building Research, Beijing
[3] China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing
来源：
Energy and Built Environment | 2023年 / 4卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Bioaerosol; Breathing zone; Computational fluid dynamics; Isolation ward; Mixed ventilation;
D O I：
10.1016/j.enbenv.2022.03.002
中图分类号：
学科分类号：
摘要：
The outbreak of COVID-19 and the spread of infectious pathogens through bioaerosols have once again aroused widespread concern worldwide. Isolation ward is an important place to prevent the spread of infectious bioaerosols. However, infection of health care workers (HCWs) in the isolation ward often occurs, so it is urgent to carry out relevant research to reduce the cross-infection between HCWs and patients. In this paper, the temporal and spatial distribution characteristics of bioaerosols under three mixed ventilation modes in a single ward were studied, namely, upper supply side return air of Case 1 and side supply and side return ventilation are Case 2 and Case 3 respectively. The results show that the removal efficiency of bioaerosol in the ventilation mode of Case 3, in which directional airflow is formed from the air supply inlet to the release source and then to the exhaust outlet, is 46.6% and 67.7% higher than that of Case 1 and Case 2, respectively. In addition, ventilation methods based on mixed theory do not guarantee good air quality in the breathing zone (1.3 m to 1.7 m) of HCWs, which may increase the inhalation risk for HCWs. It is hoped that our results can provide some useful suggestions for optimizing the airflow layout of the isolation ward, reducing the risk of cross-infection, and virus elimination. © 2022
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页码：445 / 457
页数：12
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共 46 条
  • [1] Hathway E.A., Noakes C.J., Sleigh P.A., Fletcher L.A., CFD simulation of airborne pathogen transport due to human activities, Build. Environ., 46, 12, pp. 2500-2511, (2011)
  • [2] Li Y., Leung G.M., Tang J.W., Yang X., Chao C.Y.H., Lin J.Z., Lu J.W., Nielsen P.V., Niu J., Qian H., Sleigh A.C., Su H.J.J., Sundell J., Wong T.W., Yuen P.L., Role of ventilation in airborne transmission of infectious agents in the built environment - a multidisciplinary systematic review, Indoor Air, 17, 1, pp. 2-18, (2007)
  • [3] Mao N., An C.K., Guo L.Y., Wang M., Guo L., Guo S.R., Long E.S., Transmission risk of infectious droplets in physical spreading process at different times: a review, Build. Environ., 185, (2020)
  • [4] Morawska L., Droplet fate in indoor environments, or can we prevent the spread of infection?, Proceedings of the 10th International Conference on Indoor Air Quality and Climate (Indoor Air 2005), Beijing, PEOPLES R CHINA, pp. P9-P23, (2005)
  • [5] Tang J.W., Noakes C.J., Nielsen P.V., Eames I., Nicolle A., Li Y., Settles G.S., Observing and quantifying airflows in the infection control of aerosol- and airborne-transmitted diseases: an overview of approaches, J. Hosp. Infect., 77, 3, pp. 213-222, (2011)
  • [6] Yu I.T.S., Wong T.W., Chiu Y.L., Lee N., Li Y.G., Temporal-spatial analysis of severe acute respiratory syndrome among hospital inpatients, Clin. Infect. Dis., 40, 9, pp. 1237-1243, (2005)
  • [7] Wu J.T., Leung K., Leung G.M., Nowcasting and forecasting the potential domestic and international spread of the 2019-nCoV outbreak originating in Wuhan, China: a modelling study, Lancet, 395, 10225, pp. 689-697, (2020)
  • [8] Zhang Y., Han O., Li A., Olofsson T., Zhang L., Lei W., Adaptive wall-based attachment ventilation: a comparative study on its effectiveness in airborne infection isolation rooms with negative pressure, Engineering, (2021)
  • [9] Qian H., Li Y., Nielsen P.V., Hyldgaard C.E., Wong T.W., Chwang A.T.Y., Dispersion of exhaled droplet nuclei in a two-bed hospital ward with three different ventilation systems, Indoor Air, 16, 2, pp. 111-128, (2006)
  • [10] Control C.F.D., Guidelines for environmental infection control in health-care facilities, Morb. Mort. Wkly. Rep., 52, (2003)
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