Investigation of Indoor Air Quality in Primary School Classrooms

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• 作者：Yuefei Hou ; Junjie Liu ; ^{jjliu@tju.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Jiayu Li
• 关键词：Ventilation rate ; Carbon dioxide ; PM2.5 ; Primary school
• 刊名：Procedia Engineering
• 出版年：2015
• 出版时间：2015
• 年：2015
• 卷：121
• 期：Complete
• 页码：830-837
• 全文大小：303 K

文摘

In recent IAQ studies, there is much concern about air quality in school buildings. This paper focuses on indoor air quality in classrooms of two primary schools in Beijing, China. Ventilation rates, CO₂ and PM_2.5 are measured and analyzed. The results show that ventilation rates in naturally ventilated classrooms with windows and doors closed are less than 1 l/s/p, and CO₂ concentration during class hours can increase over 2500 ppm within a class. And also, closing windows and doors can only partly prevent outdoor PM_2.5 from entering into indoor air, and indoor PM_2.5 concentrations are 60∼70% of outdoor. To insure good indoor air quality in primary schools, mechanical ventilation devices with air purification function should be introduced in.