دانلود رایگان مقاله اجرا و ارتباط شش شاخص کیفیت هوای داخل ساختمان

Abstract

The evaluation of indoor air quality (IAQ) in buildings is complex because IAQ involves a broad spectrum of substances and agents that vary over time and space. To address this complexity, IAQ indexes are used to describe, classify and improve IAQ by providing easy-to-understand and comprehensive rankings of IAQ levels in buildings. Although many IAQ indexes have been proposed all over the world, their relevancy regarding the evaluation of IAQ levels has not been fully studied in a large number of dwellings. In this study, six measurement-based IAQ indexes proposed for use in the USA, France, Taiwan, and Hong Kong were evaluated. The calculation of IAQ levels was based on nine indoor parameters measured in 567 French dwellings, i.e., indoor air temperature, relative humidity, and concentrations of formaldehyde, total volatile organic compounds, radon, carbon monoxide, carbon dioxide, PM2.5, and PM10. A factorial analysis using the multiple correspondence analysis and the hierarchical cluster analysis methods was performed to determine whether the calculated IAQ levels of different indexes in the studied dwellings were repeatable across all indexes. The results showed that three of the indexes tended to provide only positive IAQ ratings, while the other three indexes were more discriminating. Three classes of IAQ levels in dwellings, along with indoor parameters associated with each class, were identified. All of the indoor parameters were associated with the classification of IAQ levels, while the formaldehyde concentration and relative humidity were the key parameters to identify the dwellings with the best IAQ

4. Conclusions

Six IAQ indexes proposed in the USA, France, Taiwan, and Hong Kong were applied to a dataset of IAQ measurements in French dwellings to test their applicability for determining IAQ levels using a simple and integrative method and to evaluate their repeatability across all indexes. Three of the indexes, LHVP, CLIM 2000, and BILGA, were not discriminant and classified most of the dwellings into good IAQ levels. Because some parameters were not considered in the present study, e.g., some parameters were not measured in the French survey, there was a lack of discrimination for these indexes. The rankings of the other three indexes, IEI, IEITW, and IAQC, were more distributed among the 567 dwellings. The classification of dwellings according to their combination of IAQ index scores suggested that 34% of the dwellings had an unfavorable IAQ. However, the indexes were not fully consistent in determining dwellings with a good IAQ. The indoor environmental parameters used to calculate the scores from the measured concentrations and the comparison thresholds differed among the indexes, which might explain the inconsistencies found in this study