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

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Energy and Built Environment 2023年第4期4卷 445-457页

作者： Zhijian Liu Tianci Wang Yongxin Wang Haiyang Liu Guoqing Cao Song Tang Department of Power Engineering North China Electric Power UniversityBaodingHebei 071003China Institute of Building Environment and Energy China Academy of Building ResearchBeijing 100013China China CDC Key Laboratory of Environment and Population Health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijing 100021China

The outbreak of COVID-19 and the spread of infectious pathogens through bioaerosols have once again aroused widespread concern *** ward is an important place to prevent the spread of infectious ***,infection of health care workers(HCWs)in the isolation ward often occurs,so it is ur-gent to carry out relevant research to reduce the cross-infection between HCWs and *** 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 *** 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,*** 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 *** 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.

关键词： Bioaerosol Isolation ward Mixed ventilation breathing zone Computational fluid dynamics

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