Vertical Distribution Characteristics of Outdoor Particles Concentrations in High-Rise Buildings

Abstract

With speeding up urbanization in China, it is important to understand the vertical distribution characteristics of outdoor particulate matter concentrations of high-rise buildings. A high-rise building at different heights (1 st , 7 th , 11 th , 17 th , 23 th , and 27 th floors) in a university in Xi'an was tested and analyzed in this paper. Test time was 8:00, 12:00, 15:00, 15:00 and 22:00, respectively. The results showed that the concentration of each particulate matter changed the same trend roughly with the increase of vertical height at 8:00 and 22:00, as well as at 15:00 and 18:00. While the mass concentration of each particle showed a trend of first increased, then decreased and next then increased with the height increased when the time was 12:00. It caused by the inverse temperature. The particles between 0 and 1.0 μm accounted for more than 99.4% during the testing. There were mainly small particles in the atmosphere. PM 1.0 /PM 10 and PM 2.5 /PM 10 all showed a trend of first decreased and then increased at different vertical height. The highest points of PM 2.5 /PM 10 and PM 1.0 /PM 10 increased by 9.63% and 8.2% respectively from the lowest points, and the ratio was the highest at 15:00. At the same time, outdoor meteorological conditions would also affect the concentration distribution of particulate matters. This paper provides a reference for the development of high-rise buildings and the effective control of particulate matter concentration in high-rise buildings.

Comparative Filtration Performance of Composite Air Filter Materials Synthesized Using Different Impregnated Porous Media

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Effect of pipes materials on particulate matters deposition in fresh air filtration systems: A case study

“…The particle sizes of 0~1.0μm accounted for more than 99.7%. Particles in the atmosphere in Xi'an were mainly small in size, which was easy to enter the human respiratory tract and lungs, it is consistent with the conclusion of the literature [4,33]. Therefore, it is very necessary to effectively filter and purify the particulate matter in the fresh air system.…”

“…With the increasing of air pollution and the improvement of building air-tightness levels in recent years, indoor air pollution problems have become increasingly prominent [1,2]. It was not only seriously affected people's normal life, such as bad living conditions and unsatisfactory living feelings [3,4], but also brought many diseases to people's physical and mental health [5,6]. Relevant literature had shown that particles of different sizes would enter different parts of the human body and they could cause varying degrees of damage [7], as showed in fig.…”

Modifying the Fiber Structure and Filtration Performance of Polyester Materials Based on Two Different Preparation Methods

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