Influence of different air distribution on ventilation effectiveness in negative pressure hospital wards

Hospital ward is one of non-negligible potential places to occur cross-infection among patients and health workers. Air-borne transmission was regarded as the main infection route SARS-CoV-2. Preventing air-borne should be a significant measure, which could effectively mitigate risk virus infection. Based on those consideration, in this study, influence different types air distribution ventilation effectiveness modeled through Computational Fluid Dynamics (CFD) simulations. Several typical negative pressure wards same Wuhan Thunder God Mountain hospital conformed Chinese National Health Commission (NHC) guidelines were modelled. We simulated locations supply inlets, analysed buffer door compared contaminant concentration entry for The results show that required by NHC retain directional airflow from bed-zone toilet, also has better accessibility air, workers are safer avoid standing closed exhaust outlet downstream area pollutants during rounds.