Abstract
The indoor air quality has a direct impact on human health. Particulate matter is one of the important factors affecting the indoor air quality. The paper selects an office as the study object and studies the pollution characteristics and dynamic changes of indoor particulate matter in different outdoor pollution levels. The mass concentration of outdoor PM10 is used as the evaluation basis of the outdoor pollution level. The outdoor PM10 concentration levels are divided into the range of 200–300, 300–400, 400–500, 500–600, 600–700 μg·m−3, individually. Firstly, the change characteristics of the mass concentration and the number concentration of the particulate matter in the five outdoor conditions are analyzed. Secondly, the maximum increase values and the maximum increase rates of the mass concentrations of different particle sizes in the five conditions are compared. Then, the penetration factors of the particulates in different sizes are compared among the five conditions. Finally, the correlation between indoor particulate matter and outdoor particulate matter is studied. The study results show that the effect of outdoor infiltration has a great influence on the indoor PM1 mass concentration, and the penetrating factors of the particulate matter between 0.3 μm and 0.5 μm are higher than 0.6; their permeability is the most obvious.
Highlights
With the rapid development of economy and the continuous improvement of living standards, people’s requirements for indoor environment are confined to indoor thermal comfort and placed on the indoor particle pollution, namely, indoor air quality
According to the relevant data, a majority of people spend 70∼90% of their time indoors, especially for the elderly people and the disabled man [1,2,3]. erefore, indoor air quality is directly related to the health of a human body [4, 5]
It is an important index to evaluate the indoor air quality. e size of indoor particles is usually expressed by aerodynamic diameter
Summary
Guozhong Zheng , Yuzhen Lu, Yajing Wang, Zhengzheng Zhao, Ke Li, and Xutao Zhang. School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China. Particulate matter is one of the important factors affecting the indoor air quality. E paper selects an office as the study object and studies the pollution characteristics and dynamic changes of indoor particulate matter in different outdoor pollution levels. The change characteristics of the mass concentration and the number concentration of the particulate matter in the five outdoor conditions are analyzed. En, the penetration factors of the particulates in different sizes are compared among the five conditions. E study results show that the effect of outdoor infiltration has a great influence on the indoor PM1 mass concentration, and the penetrating factors of the particulate matter between 0.3 μm and 0.5 μm are higher than 0.6; their permeability is the most obvious The correlation between indoor particulate matter and outdoor particulate matter is studied. e study results show that the effect of outdoor infiltration has a great influence on the indoor PM1 mass concentration, and the penetrating factors of the particulate matter between 0.3 μm and 0.5 μm are higher than 0.6; their permeability is the most obvious
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