Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Deposition velocity of fine and ultrafine particles onto manikin surfaces in indoor environment of different facial air speeds
Abstract Indoor airborne particles deposit onto human body surfaces. This deposition process not only changes indoor particle concentration, but affects indoor particle size distribution as well. Additionally, various air pollutants bound with indoor airborne particles, of which the deposition onto human body causes dermal exposure to air pollutants. Air speed is one of the key factors influencing particle deposition velocity onto human body surfaces. Air speed is also an important parameter for indoor thermal comfort. This study focused on particle deposition velocity (v d) onto human body due to an increase in facial air speed in indoor environment. Deposition velocities of fine and ultrafine particles (30–500 nm) onto a sitting and a standing manikin, which experienced facial air speed of 0.4, 0.8 and 1.2 m s−1, were experimentally measured in a well-sealed steel chamber. The heat dissipations of the manikins were set as 50 W and 100 W. The results showed that for the studied particles, deposition velocity onto different manikin surfaces increased from 0.048–2.68 m h−1 to 1.19–8.79 m h−1 as facial air speed went up from 0.4 to 1.2 m s−1. The change of facial air speed had a stronger effect on smaller particles than on larger particles. The results of this study may well be helpful in further studies on dermal exposure estimation, indoor particle distribution analysis and even airflow design.
Highlights Particle deposition velocity increased as the facial air speed increased. Facial air speed influenced the fine particle deposition more significantly. The results of this study can be used to estimate dermal exposure to particles.
Deposition velocity of fine and ultrafine particles onto manikin surfaces in indoor environment of different facial air speeds
Abstract Indoor airborne particles deposit onto human body surfaces. This deposition process not only changes indoor particle concentration, but affects indoor particle size distribution as well. Additionally, various air pollutants bound with indoor airborne particles, of which the deposition onto human body causes dermal exposure to air pollutants. Air speed is one of the key factors influencing particle deposition velocity onto human body surfaces. Air speed is also an important parameter for indoor thermal comfort. This study focused on particle deposition velocity (v d) onto human body due to an increase in facial air speed in indoor environment. Deposition velocities of fine and ultrafine particles (30–500 nm) onto a sitting and a standing manikin, which experienced facial air speed of 0.4, 0.8 and 1.2 m s−1, were experimentally measured in a well-sealed steel chamber. The heat dissipations of the manikins were set as 50 W and 100 W. The results showed that for the studied particles, deposition velocity onto different manikin surfaces increased from 0.048–2.68 m h−1 to 1.19–8.79 m h−1 as facial air speed went up from 0.4 to 1.2 m s−1. The change of facial air speed had a stronger effect on smaller particles than on larger particles. The results of this study may well be helpful in further studies on dermal exposure estimation, indoor particle distribution analysis and even airflow design.
Highlights Particle deposition velocity increased as the facial air speed increased. Facial air speed influenced the fine particle deposition more significantly. The results of this study can be used to estimate dermal exposure to particles.
Deposition velocity of fine and ultrafine particles onto manikin surfaces in indoor environment of different facial air speeds
Shi, Shanshan (Autor:in) / Li, Yin (Autor:in) / Zhao, Bin (Autor:in)
Building and Environment ; 81 ; 388-395
19.07.2014
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2014
Deposition of Fine and Ultrafine Particles on Indoor Surface Materials
| Online Contents | 2008