Experimental study on the control effect of different ventilation systems on fine particles in a simulated hospital ward

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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  • Xiangfei Kong
  • Chenli Guo
  • Shasha Duan
  • Junjie He
  • Yue Ren
  • Jianlin Ren


Original languageEnglish
Article number103102
Journal / PublicationSustainable Cities and Society
Online published17 Jun 2021
Publication statusPublished - Oct 2021


In recent years, a large number of respiratory infectious diseases (especially COVID-19) have broken out worldwide. Respiratory infectious viruses may be released in the air, resulting in cross-infection between patients and medical workers. Indoor ventilation systems can be adjusted to affect fine particles containing viruses. This study was aimed at performing a series of experiments to evaluate the ventilation performance and assess the exposure of healthcare workers (HW) to virus-laden particles released by patients in a confined experimental chamber. In a typical ward setting, four categories (top supply and exhaust, side supply and exhaust) were evaluated, encompassing 16 different air distribution patterns. The maximum reduction in the cumulative exposure level for HW was 70.8% in ventilation strategy D (upper diffusers on the sidewall supply and lower diffusers on the same sidewall return). The minimum value of the cumulative exposure level for a patient close to the source of the contamination pertained to Strategy E (upper diffusers on the sidewall supply and lower diffusers on the opposite sidewall return). Lateral ventilation strategies can provide significant guidance for ward operation to minimizing the airborne virus contamination. This study can provide a reference for sustainable buildings to construct a healthy indoor environment.

Research Area(s)

  • Cross-infection, Exposure control, Particulate matter, Side return air distribution, Ventilation performance

Citation Format(s)