Transport of gaseous pollutants around a human body in quiescent indoor environment

Dusan Licina, Arsen Krikor Melikov, Pawel Mioduszewski, Chandra Sekhar, Kwok Wai Tham

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Abstract

“Well-mixed” assumption often leads to inadequate prediction of the human exposure. In spaces that operate with a low air velocity, local airflows generated by occupants play predominant role for pollutant transport. The present study investigates the ability of a human convective boundary layer (CBL) to transport the pollution in quiescent indoor environment. A human body is resembled by a thermal manikin with a body shape and surface temperature distribution of a real person. The objective of the study is to examine the impact of the pollutant location around the human body on the pollution concentration levels in the breathing zone. The results show that the location of the pollution source has a considerable influence of the breathing zone concentrations. This is contributed to the human CBL, as it pulls the pollution emitted close to the human body and transports it to the breathing zone. For different pollutant location studied, the highest breathing zone concentrations are achieved when the pollution is located at the chest, while there is zero exposure for the pollutants emitted from the upper back or behind the chair. The results suggest that understanding of the air patterns around the human body should be recognized in ventilation design practice.
Original languageEnglish
Title of host publicationProceedings of ROOMVENT 2014, 13th SCANVAC International Conference on Air Distribution in Rooms
Publication date2014
Pages182–189
Publication statusPublished - 2014
Event13th SCANVAC International Conference on Air Distribution in Rooms: New ventilation strategies based in active and passive technology in buildings and for comfort in airplanes - São Paulo, Brazil
Duration: 19 Oct 201422 Oct 2014
Conference number: 13

Conference

Conference13th SCANVAC International Conference on Air Distribution in Rooms
Number13
CountryBrazil
CitySão Paulo
Period19/10/201422/10/2014

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