Check updates Indoor air quality analysis of 8 mechanically ventilated residential buildings in northeast China based on long-term monitoring
Check updates Indoor air quality analysis of 8 mechanically ventilated residential buildings in northeast China based on long-term monitoring
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基于长期监测的东北地区8栋机械通风住宅室内空气质量分析
DOI：
10.1016/j.scs.2019.101947
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发表时间：
2020-03-01
影响因子：
11.7
通讯作者：
Song, Jiasen
中科院分区：
文献类型：
--
作者：
Huang, Kailiang;Sun, Wen;Song, Jiasen
在这项研究中，选择了8个安装了新风系统的住宅楼，以监测室内空气质量。收集了甲醛、VOC、CO2和PM2.5的温度和浓度数据。采用酚试剂分光光度法和气相色谱-质谱联用仪对现场甲醛和VOC浓度进行检测。室内空气质量传感器、窗户传感器、新风系统传感器和智能插座用于在线长期监测。测试结果表明，室内空气质量具有季节性特征。PM2.5、甲醛和CO2浓度分别在冬季、夏季和过渡季节超过国家标准。新风系统对降低室内甲醛、VOC、CO2浓度有明显效果。新鲜空气系统在使用时将甲醛浓度降低了52.4%。封闭条件下TVOC浓度为0.641 mg/m3，年均值为46.8%，CO2浓度仅在供暖初期超标，平均浓度为1133 ppm。不过，只有中效和高效过滤新风系统才能显著降低PM2.5浓度，使用空气净化器辅助普通粗滤是一个值得的选择。
In this study, 8 residential buildings with installed fresh air systems were selected to monitor indoor air quality. Data on temperature and concentrations of formaldehyde, VOC, CO2, and PM2.5 were collected. Phenol reagent spectrophotometry and GC-MS were used to test for the concentrations of formaldehyde and VOC on site. Indoor air quality sensors, window sensors, fresh air system sensors, and smart sockets were used for long-term monitoring online. The test results showed that the indoor air quality varied with seasonal characteristics. The concentrations of PM2.5, formaldehyde, and CO2 exceeded the national standard in winter, summer and transition seasons, respectively. The fresh air systems had obvious effect on reducing indoor concentrations of formaldehyde, VOC, and CO2. Fresh air systems reduced the concentration of formaldehyde by 52.4 % when in use. The TVOC concentration under closed condition was 0.641 mg/m(3), and the annual average was 46.8 % of it.The CO2 concentration exceeded the national standard only during the early stage of heating, with an average concentration of 1133 ppm. However, only the medium and high-efficiency filtration fresh air systems significantly reduced PM2.5 concentration, and using air purifiers to assist in common coarse filtration was a worthwhile choice.