A simple method for differentiating direct and indirect exposure to exhaled contaminants in mechanically ventilated rooms
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AbstractMany airborne infectious diseases can be transmitted via exhaled contaminants transported in the air. Direct exposure occurs when the exhaled jet from the infected person directly enters the breathing zone of the target person. Indirect exposure occurs when the contaminants disperse in the room and are inhaled by the target person. This paper presents a simple method for differentiating the direct and indirect exposure to exhaled contaminants in mechanically ventilated rooms. Experimental data for 191 cases were collected from the literature. After analyzing the data, a simple method was developed to differentiate direct and indirect exposure in mixing and displacement ventilated rooms. The proposed method correctly differentiated direct and indirect exposure for 120 out of the 133 mixing ventilation cases and 47 out of the 58 displacement ventilation cases. Therefore, the proposed method is suitable for use at the early design stage to quickly assess whether there will be direct exposure to exhaled contaminants in a mechanically ventilated room.
All Author(s) ListChun Chen, Bin Zhao, Dayi Lai, Wei Liu
Journal nameBuilding Simulation
Year2018
Month10
Volume Number11
Issue Number5
PublisherSpringer
Pages1039 - 1051
ISSN1996-3599
eISSN1996-8744
LanguagesEnglish-United States

Last updated on 2020-19-10 at 03:17