State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Sciences and Engineering, Nankai University, Tianjin 300071, China.
J Environ Sci (China). 2012;24(4):657-64. doi: 10.1016/s1001-0742(11)60812-7.
A new air exchange rate (AER) monitoring method using continuous CO2 sensors was developed and validated through both laboratory experiments and field studies. Controlled laboratory simulation tests were conducted in a 1-m3 environmental chamber at different AERs (0.1-10.0 hr(-1)). AERs were determined using the decay method based on box model assumptions. Field tests were conducted in classrooms, dormitories, meeting rooms and apartments during 2-5 weekdays using CO2 sensors coupled with data loggers. Indoor temperature, relative humidity (RH), and CO2 concentrations were continuously monitored while outdoor parameters combined with on-site climate conditions were recorded. Statistical results indicated that good laboratory performance was achieved: duplicate precision was within 10%, and the measured AERs were 90%-120% of the real AERs. Average AERs were 1.22, 1.37, 1.10, 1.91 and 0.73 hr(-1) in dormitories, air-conditioned classrooms, classrooms with an air circulation cooling system, reading rooms, and meeting rooms, respectively. In an elderly particulate matter exposure study, all the homes had AER values ranging from 0.29 to 3.46 hr(-1) in fall, and 0.12 to 1.39 hr(-1) in winter with a median AER of 1.15.
采用连续 CO2 传感器的新风交换率（AER）监测方法通过实验室实验和现场研究得到了开发和验证。在不同 AER（0.1-10.0 hr-1）下，在 1m3 环境室中进行了受控的实验室模拟测试。AER 是根据箱模型假设的衰减法确定的。在 2-5 个工作日期间，使用与数据记录器耦合的 CO2 传感器在教室、宿舍、会议室和公寓中进行了现场测试。连续监测室内温度、相对湿度（RH）和 CO2 浓度，同时记录室外参数和现场气候条件。统计结果表明，实验室性能良好：重复精度在 10%以内，测量的 AER 是实际 AER 的 90%-120%。宿舍、空调教室、带空气循环冷却系统的教室、阅览室和会议室的平均 AER 分别为 1.22、1.37、1.10、1.91 和 0.73 hr-1。在一项老年人颗粒物暴露研究中，所有住宅在秋季的 AER 值范围为 0.29 至 3.46 hr-1，冬季的 AER 值范围为 0.12 至 1.39 hr-1，中位数 AER 为 1.15。
