On-site measurement of airborne transmission between flats in a building

Yan Wu, Jianlei Niu, Chiwah Tung

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Airborne transmission is an important spread mode of infectious diseases. A transmission route between adjacent flats induced by infiltration flow was investigated. On-site measurements were carried out in a typical slab-type public house in Hong Kong, and the tracer gas technique was employed. The transmission mechanism and major impact factor were analyzed. It is found that, the tracer gas concentration in adjacent flats is one order lower than that of the dosing flat. With the increase of spread distance, the tracer gas is. diluted. Airborne transmission from the source flat to the opposite flat is sensitive to the incoming wind condition. The mass fraction of air raised with the increase of wind speed, varied with the change of wind direction. The difference of average mass fraction in different wind speeds or directions is about twice. However, the transmission from the source flat to the other flat has no definite correlation with incoming wind condition. The mass fraction of air from source flat to its opposite flat could be up to 0.18, while to the other one could also reach 0.08. The possible infectious risk between adjacent flats should not be underestimated. The study could help to assess the infectious risk in epidemiologic studies and to validate CFD models for related research.
Original languageEnglish
Title of host publicationVentilation 2015 - Proceedings of the 11th International Conference on Industrial Ventilation
PublisherInternational Conference on Industrial Ventilation
Pages102-109
Number of pages8
Volume1
ISBN (Electronic)9780000000002
Publication statusPublished - 1 Jan 2015
Event11th International Conference on Industrial Ventilation, Ventilation 2015 - Shanghai, China
Duration: 26 Oct 201528 Oct 2015

Conference

Conference11th International Conference on Industrial Ventilation, Ventilation 2015
Country/TerritoryChina
CityShanghai
Period26/10/1528/10/15

Keywords

  • Airborne transmission
  • Infiltration flow
  • On-site measurements
  • Tracer gas method

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Civil and Structural Engineering
  • Building and Construction
  • Control and Systems Engineering

Cite this