Research on the Effects of Different Ventilation Systems on Pollutant Emission in Wards
With the frequent occurrence of infectious diseases,the issue of indoor air quality in healthcare settings attracted considerable attention. Existing research indicated that ventilation systems were critical for removing indoor pollutants and reducing the risk of cross-infection. However,the specific effects of displacement ventilation systems in medical settings had not been fully clarified. This study investigated the indoor environmental characteristics of displacement ventilation systems using CFD simulations. The study explored pollutant removal under different air change rates,ventilation modes,and positions of radiant walls. Additionally,the concept of the Inhalation Factor (IF) for healthcare workers was introduced to evaluate their exposure risk in local areas. Simulation results showed that the pollutant removal index of the displacement ventilation system ranged from 0.65 to 2.0,while the IF values ranged mainly from 0 to 12. The study found that as the air change rate increased,the IF value decreased,making IF a more suitable indicator for assessing the infection risk due to pollutant concentrations in local areas. Although the displacement ventilation system demonstrated high air change efficiency and pollutant removal efficiency,it could not effectively prevent cross-infection between healthcare workers and patients. Therefore,displacement ventilation systems did not show a significant advantage in preventing cross-infection.
Displacement ventilationCFDIntake fraction indexPollutant removal index
万方数据
维普
