Indoor air quality and occupants' ventilation habits in China: Seasonal measurement and long-term monitoring

Liu, Junjie; Dai, Xilei; Li, Xiangdong; Jia, Susu; Pei, Jingjing; Sun, Yuexia; Lai, Dayi; Xiong, Shuidong; Sun, Hejiang; Yin, Haiguo; Huang, Kailiang; Tan, Hongwei; Gao, Yao; Jian, Yiwen

doi:10.1016/j.buildenv.2018.06.002

Cited by 79 publications

(55 citation statements)

References 33 publications

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“…Figure 2b shows the concentration of PM in the living/kitchen areas. The outdoor concentrations of PM10 and PM2.5 during the experimental period were 40 to 90µ g/m 3 and 20 to 40µ g/m 3 , respectively. Based on this result, the concentration of internal PM was affected by factors related to the behaviors of residents rather than external effects.…”

Section: Measurement Of Indoor Air Qualitymentioning

confidence: 96%

“…Figure 3b shows the concentration of PM in Room 1. During the experiment, the outdoor concentration of PM10 was as high as 260 µ g/m 3 and that of PM2.5 ranged from 30 up to 120 µ g/m 3 . The concentration of internal PM was maintained at an acceptable level without being greatly affected from the outside owing to the insignificant impact of infiltration.…”

Section: Measurement Of Indoor Air Qualitymentioning

confidence: 99%

“…Previous studies have indicated that the concentrations of CO 2 and PM (i.e., PM 10 and PM 2.5 ; PM 10 is particulate matter 10 micrometers or less in diameter, PM 2.5 is particulate matter 2.5 micrometers or less in diameter) in houses in Korea tend to exceed both the Korean and international standards for indoor air quality, and that maintenance regarding such pollutants is required. Special attention is needed to examine indoor air quality during the sleep time of a resident, which accounts for one-third of the day [2][3][4][5][6]. Bekö et al [7] noted that the ventilation rate was likely to be low during the sleep time of residents.…”

Section: Introductionmentioning

confidence: 99%

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Development of a Ventilation System Using Window Cavity

2020

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A household unit of an existing apartment in which residents lived was selected, and the indoor air quality in each space of the unit was measured for analysis. Analysis of the measurement data indicated that the concentration of carbon dioxide (CO2) constantly increased beyond 1000 ppm when a resident stayed indoors for an hour or more. Specifically, the concentration of CO2 increased when the resident was asleep to a level wherein negative impacts on health were observed. Moreover, the inflow of particulate matter (PM) was mainly caused by natural ventilation from the outside rather than the behavior of indoor residents, which generated an insignificant amount of PM. This study proposes a new ventilation system for solving the above-described problems. According to the system, when a window is closed, the window cavity created between a new frame and the existing frame is utilized as an air path for ventilation. The application of this system ensures a stable amount of ventilation through forced ventilation and prevents the inflow of external PM. Moreover, this system was designed to recover indoor heat through the window cavity and facilitate the pre-heating of outdoor air through heat collection based on solar radiation during the day.

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Section: Measurement Of Indoor Air Qualitymentioning

confidence: 96%

Section: Measurement Of Indoor Air Qualitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of a Ventilation System Using Window Cavity

2020

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“…Measurements were made based on assumption the IAQ conditions are the same during the year [3,8,9]. Several studies have shown that seasonal variation or non-heating and heating time period differences [10,11,12], considering IAQ variation by season climate change and human heating behavior. However, those studies only took a short time sampling each season.…”

Section: Introductionmentioning

confidence: 99%

“…One challenge is that IAQ data sampling/collection is expensive, complex to customize and operate, and professional expertise dependency. To measure multiple pollutants, various devices should be bought from different manufactures [3,10,12]. For example, Aeroqual 200 to measure nitrogen dioxide (NO 2 ) and Total Volatile Organic Components (TVOC); Extech VPC300 to measure particulate matter (PM); htV-M to measure formaldehyde (HCHO); Q-Trak to measure carbon monoxide (CO).…”

Section: Introductionmentioning

confidence: 99%

Indoor Air-Quality Data-Monitoring System: Long-Term Monitoring Benefits

Sun

Zheng

Villalba-Díez

et al. 2019

Sensors

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Indoor air pollution has been ranked among the top five environmental risks to public health. Indoor Air Quality (IAQ) is proven to have significant impacts on people’s comfort, health, and performance. Through a systematic literature review in the area of IAQ, two gaps have been identified by this study: short-term monitoring bias and IAQ data-monitoring solution challenges. The study addresses those gaps by proposing an Internet of Things (IoT) and Distributed Ledger Technologies (DLT)-based IAQ data-monitoring system. The developed data-monitoring solution allows for the possibility of low-cost, long-term, real-time, and summarized IAQ information benefiting all stakeholders contributing to define a rich context for Industry 4.0. The solution helps the penetration of Industrial Internet of Things (IIoT)-based monitoring strategies in the specific case of Occupational Safety Health (OSH). The study discussed the corresponding benefits OSH regulation, IAQ managerial, and transparency perspectives based on two case studies conducted in Spain.

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