Abstract
Airborne fine particulate matter (PM2.5) is an important factor affecting indoor air quality and is significantly related to human health. A lot of research has been done on PM2.5 pollution control in buildings, but there is lack of systematic indoor PM2.5 pollution control for engineering applications. In this study, first, we propose an outdoor calculated concentration of PM2.5 in 74 cities, in China, using the “not guaranteed for five days” method, which is based on outdoor PM2.5 concentration monitoring data from 2016 to 2018. Then, different levels of indoor calculated concentrations of PM2.5 (25 μg/m3, 35 μg/m3, and 75 μg/m3) are put forward. Secondly, methods for selecting air purification equipment in centralized, semi-centralized, and decentralized air conditioning systems are proposed. Finally, PM2.5 pollution control measures and system energy-saving operation strategies in buildings are put forward. This study stipulates the calculation of PM2.5 concentration, unifies design methods, proposes control measures, and standardizes operations management. The aim of this study is to provide technical guidance for engineering design, construction and operation, and therefore to reduce the risk of indoor diseases caused by exposure to PM2.5.
Highlights
Human health can significantly be affected by particulate matter
According to the data from the World Health Organization (WHO), around seven million people die every year from exposure to fine particles in polluted air that penetrate deep into the lungs and cardiovascular system, causing diseases including stroke, heart disease, lung cancer, chronic obstructive pulmonary diseases, and respiratory infections, including pneumonia [7]
This paper introduces the following: (1) Outdoor and indoor calculated concentrations of PM2.5, (2) design and calculation methods of PM2.5 pollution control in buildings, (3) a selection method for air purification equipment in different air conditioning systems, (4) PM2.5 pollution control measures in buildings, and (5) an energy-saving operation strategy for the PM2.5 pollution control system
Summary
Human health can significantly be affected by particulate matter. Long-term exposure to an environment that is polluted by particulate matter can damage the human respiratory system, cardiovascular and cerebrovascular system, immune system, nervous system, and reproductive system, etc. [1,2,3,4,5]. This paper introduces the following: (1) Outdoor and indoor calculated concentrations of PM2.5, (2) design and calculation methods of PM2.5 pollution control in buildings,. The outdoor PM2.5 concentration limit (daily average) specified in the Ambient Air Quality. Considering the current situation of particulate matter pollution and its health risks in China, the current indoor calculated concentrations of PM2.5 in this standard are consistent with the concentration limit defined in the Ambient Air Quality Standard GB 3095-2012. The Class II standard is identical to the level 1 concentration limit in the Ambient Air. Buildings with strict requirements of indoor PM2.5 concentration, such as nurseries, kindergartens, nursing homes, and other special buildings should be designed with a Class I standard.
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