Investigation of Indoor VOCs Pollution and Indoor Environment in Residential Building in Changchun of Northeast China

学生名：尹 婷婷

研究テーマ：Investigation of Indoor VOCs Pollution and Indoor Environment in Residential Building in Changchun of Northeast China

入学年月:2021.04

修了年月:2023.03

取得学位：修士（工学）

論文概要:Indoor air pollution in residential houses has become a significant concern, particularly due to the complex composition of decoration materials, which emit various pollutants, with Volatile Organic Compounds (VOCs) being a primary example. This study reviews recent advancements in the understanding of VOCs in China, including their definition, sources, evaluation criteria, and control methods.

A survey involving 265 residents in Changchun collected data on building characteristics, indoor temperature, humidity, ventilation habits, and environmental satisfaction. Analysis using SPSS software showed significant differences between ventilation frequency and indoor temperature satisfaction (p=0.000<0.01). The findings revealed that 93% of residents rely on window ventilation as the primary air exchange method, though insufficient ventilation time negatively impacts air quality. Despite adequate indoor temperatures during the heating season, dissatisfaction among some residents contributes to limited ventilation, further affecting air quality.

Field measurements of VOC concentrations were conducted in newly renovated residences during winter and summer. Results indicated that VOC levels are influenced by decoration materials, stages, and seasons. Spring and summer are recommended for renovation due to higher temperatures facilitating VOC emissions. Analysis of 30 dwellings within two years of renovation highlighted that temperature, humidity, decoration load, and functional areas are critical factors affecting indoor VOC concentrations. VOC emissions increase with rising temperature and humidity, with combined effects exceeding the additive impact of each factor alone. To improve air quality, it is suggested to increase window ventilation during summer to enhance air exchange and accelerate the emission of VOCs from furniture and materials.