Airborne Cross-infection Risk Under Different Body Orientations in an Air-conditioned Room

초록

This study aims to investigate airborne cross-infection risk based on different body orientations (face-to-face, side-by-side, and back-to-back), with varying air discharge angles (-20°, 0°, and +20°) and air temperatures (18 and 30 ℃) from an air conditioner. In this study, experiments were conducted in a full-scale test chamber using two manikins and simulated particles (NaCl). The cross-infection risk was initially high in the face-to-face position, and in the side-by-side position after 20 min, without air conditioner operation. With the operation of the air conditioner, the overall cross-infection risk was highest in the face-to-face position and lowest in the back-to-back position; however, after installing the partition, the back-to-back and side-by-side positions showed a high cross-infection risk. The results indicated that under the same distance between two individuals and indoor airflow conditions, body orientation was a crucial factor influencing the cross-infection risk. © 2024 18th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2024 - Conference Program and Proceedings. All rights reserved.

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