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Indoor air quality investigation of a university library based on field measurement and questionnaire survey

机译：基于现场测量和问卷调查的高校图书馆室内空气质量调查

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This article presents field studies and questionnaire survey on the indoor air quality (IAQ) in library rooms in University of Science and Technology Beijing in April 2016, with no heating, to find out actual situation of IAQ in university library. Nine rooms equipped without centralized air-conditioning system were carefully selected for the test. Results showed that each room had diverse indoor thermal environment and concentrations of CO2, PM2.5, formaldehyde and TVOC. The concentration of CO2 ranged from 575 to 2400 ppm, PM2.5 concentration was 40–70% of the outdoor, the highest concentration of formaldehyde and TVOC was ~0.042 and 0.285 mg m?3, respectively with half of the upper limit. The concentrations of CO2 and PM2.5 in the holding-reading rooms were higher than that in the rooms only holding books. The situation of formaldehyde and TVOC concentrations was just opposite. The correlations between satisfaction of IAQ and the concentrations of indoor air pollutants were not as a constant, but changing with different rooms. Based on gray system theory, satisfactions were affected seriously by CO2 and PM2.5. One improving plan with the theme of ‘ventilating rapidly along with purifying’ was determined based on a general mass balance equation. In theory, IAQ can be improved 5 min for the most unfavorable condition. Through analysis, requirements of fresh air and functionality of the space usages should be considered in the ventilation or central air-conditioning system design.
机译：本文介绍了2016年4月北京科技大学无暖气的图书馆室内空气质量（IAQ）的实地研究和问卷调查，以了解大学图书馆IAQ的实际情况。精心挑选了九间没有配备中央空调系统的房间进行测试。结果显示，每个房间都有不同的室内热环境，以及CO2，PM2.5，甲醛和TVOC的浓度。 CO2浓度范围为575至2400 ppm，PM2.5浓度为室外的40-70％，甲醛和TVOC的最高浓度分别为〜0.042和0.285 mg m？3，上限的一半。阅览室中的CO2和PM2.5的浓度高于仅藏书室中的。甲醛和TVOC浓度的情况恰好相反。室内空气质量满意度与室内空气污染物浓度之间的相关性不是一个常数，而是随不同房间而变化的。基于灰色系统理论，满意度受到CO2和PM2.5的严重影响。根据一般的质量平衡方程，确定了一个以“快速通风与净化”为主题的改进计划。从理论上讲，在最不利的条件下，IAQ可以改善<5分钟。通过分析，在通风或中央空调系统设计中应考虑新鲜空气的需求和空间使用的功能。

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