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Modelling of particulate matters distribution inside the multilevel urban classrooms in tropical climate for exposure assessment

机译：模拟热带气候下多层城市教室内颗粒物的分布，以进行暴露评估

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摘要

The characteristics of indoor air quality (IAQ) parameters such as PM mass (PM10, PM2.5, PM1) and particle number concentrations (PNC), carbon monoxide (CO), carbon dioxide (CO2), temperature (T) and relative humidity (RH) in multilevel urban classrooms of a school in tropical climate were studied. The PNC in the range 0.35-22.5 mu m was monitored for 2 days in each classroom during the working hours using environment dust monitor and converted to mass concentrations. The 8hr-mean concentrations of PM10, PM2.5, PM1 mass, CO, CO2, T, and RH inside ground floor (GF) classroom were found to be 942.84 +/- 248.49, 61.59 +/- 17.19 and 16.13 +/- 3.65 mu g/m(3), 458.86 +/- 58.60 ppm, 34.80 +/- 0.81 degrees C, 55.06 +/- 4.10%, 0.93 +/- 0.43 ppm, respectively. The PM10 mass concentrations were found to decrease by 8.35 and 46.67%, respectively in first and second floor classrooms. Similarly, PM1 and PM2.5 values were increased by 4.60 and 12.99%, respectively in first floor and decreased by 3235 and 16.61%, respectively in second floor classrooms. The PNC for particles of size 0.3-1 mu m were 58.04, 71.24 and 55.47 particles/cm(3) for ground floor, first and second floor classrooms, respectively. The PNC of coarse particles were found to decrease with increase in floor heights. The thermal comfort parameters namely; CO2, T, and RH were more or less showing same trend in all the three classrooms. The distribution of PM10, PM2.5 and PM1 mass data in ground and first floor classrooms fitted with lognormal 3-parameter (3-P) distribution while the second floor PM mass data best fitted to the log-logistic 3-parameter (3-P) distribution. (C) 2016 Elsevier Ltd. All rights reserved.
机译：室内空气质量（IAQ）参数的特征，例如PM质量（PM10，PM2.5，PM1）和颗粒数浓度（PNC），一氧化碳（CO），二氧化碳（CO2），温度（T）和相对湿度在热带气候的学校多层城市教室中研究了（RH）。在每个教室的工作时间内，使用环境粉尘监测仪对PNC范围为0.35-22.5μm的PNC进行2天的监测，并转换为质量浓度。发现地面教室（GF）教室内PM10，PM2.5，PM1质量，CO，CO2，T和RH的8小时平均浓度为942.84 +/- 248.49、61.59 +/- 17.19和16.13 +/-分别为3.65μg / m（3），458.86 +/- 58.60 ppm，34.80 +/- 0.81摄氏度，55.06 +/- 4.10％，0.93 +/- 0.43 ppm。发现一楼和二楼教室的PM10质量浓度分别降低了8.35和46.67％。同样，一楼的PM1和PM2.5值分别增加4.60和12.99％，二楼的教室分别减少3235和16.61％。对于地面教室，一楼和二楼教室，尺寸为0.3-1微米的颗粒的PNC分别为58.04、71.24和55.47颗粒/ cm（3）。发现粗颗粒的PNC随着地板高度的增加而降低。热舒适参数即；在所有三个教室中，CO，T和RH或多或少都显示出相同的趋势。在一楼和一楼的教室中PM10，PM2.5和PM1质量数据的分布符合对数正态3参数（3-P）分布，而二楼的PM质量数据最适合对数逻辑3参数（3- P）分布。 （C）2016 Elsevier Ltd.保留所有权利。

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