Evaluation of the fresh air purification system in the classroom under heavy pollution weather
10.3760/cma.j.cn112150-20200930-01249
- VernacularTitle:重污染天气下教室内新风净化系统使用效果评价研究
- Author:
Hang DU
1
;
Yanwen WANG
;
Liangliang CUI
;
Jianlong FANG
;
Qinghua SUN
;
Yanjun DU
;
Yingjian ZHANG
;
Yu ZHONG
;
Zihao HUANG
;
Wenjing ZHANG
;
Xiumiao PENG
;
Yang ZHANG
;
Tiantian LI
Author Information
1. 中国疾病预防控制中心环境与人群健康重点实验室 中国疾病预防控制中心环境与健康相关产品安全所，北京 100021
- Keywords:
Particulate matter;
Air pollution, indoor;
Decontamination;
Fresh air system;
Indoor/outdoor ratio
- From:
Chinese Journal of Preventive Medicine
2021;55(8):995-998
- CountryChina
- Language:Chinese
-
Abstract:
Evaluate the effect of the fresh air purification system on the improvement of indoor PM 2.5 levels in a primary school classroom in Jinan City, Shandong Province. Our purpose is to explore the optimal operating time of the fresh air system and the main factors that affect the fresh air purification system to improve indoor air quality. From December 9, 2019 to December 10, 2019, two classrooms of the same area on the third floor of a primary school building in Jinan City, Shandong Province were selected as monitoring points. During the operation of the fresh air purification system, the PM 2.5 concentration in the classroom is reduced by an average of 48.1%-61.5% compared to the outdoor PM 2.5 concentration. After running for about 2 hours, the indoor PM 2.5 concentration decreased to a relatively stable concentration level. The operating time of the fresh air purification system, student activities between classes, indoor temperature, indoor relative humidity, and outdoor PM 2.5 concentration are important factors that affect the indoor particulate removal rate. In the case of a certain amount of fresh air and indoor area, closing doors and windows and appropriately extending the operation time of the fresh air purification system can improve the air quality in the classroom to a certain extent and protect the health of students.
