Association between Nighttime Air Infiltration of Bedroom and Characteristics of Residential Building in Shanghai
- 198 Downloads
This study collected samples from 93 residential buildings in Shanghai. Based on the change of CO2 concentrations measured in these samples, we have analysed the relationship between bedroom air infiltration ratio and the residential characteristics during night, when doors and windows were closed, from 00:00 a.m. to 6:00 a.m.. The result shows that the average CO2 concentration in the bedrooms was 1448 ppm at night. CO2 concentrations from 89.2% of the tested bedrooms were higher than the upper CO2 level required by GB/T18883-2002 (over 1000 ppm). Analysis of variance shows significant factors affecting the bedroom air infiltration ratio at night including the type of window, season, gap-length of doors and windows, and type of residence. These four factors rank according to Spearman correlation analysis as follows: window type, detection season, door and window gap length, residential type. This paper is significant for its guidance on keeping the balance between building energy consumption and indoor air quality.
KeywordsNighttime air infiltration ratio Residential characteristics of shanghai Bedroom Analysis of variance Correlation analysis
This work is financially supported by the National Key Research and Development Program of China (2017YFC0702700), National Natural Science Foundation of China (51708347) and Shanghai Sailing Program (17YF1412800, 18YF1418200). Informed consent was obtained from all individual participants included in this study and appropriate permissions from residences owner were obtained for our study.
- 3.Ipbüker, C., Valge, M., Kalbe, K., et al.: Case study of multiple regression as evaluation tool for the study of relationships between energy demand, air tightness, and associated factors. J. Energy Eng. 4, 16–27 (2016)Google Scholar
- 4.Huang, C.: Building Environmental Science (2nd edn). Mechanical Industry Press (2016)Google Scholar
- 5.Persily, A.K.: Evaluating building IAQ and ventilation with indoor carbon dioxide. Ashrae Trans. 2, 103–110 (1997)Google Scholar
- 6.Quality A: Standard Guide for Using Indoor Carbon Dioxide Concentrations to Evaluate, Astm (2002)Google Scholar
- 7.ASHRAE: ASHRAE Handbook-Fundamentals. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Atlanta, GA (2013)Google Scholar
- 8.Šťávová, P.: Experimental Evaluation of Ventilation in Dwellings by Tracer Gas CO2. Czech Technical University in Prague Faculty of Mechanical Engineering Department of Environmental Engineering (2011)Google Scholar
- 9.GB/T18883-2002: Indoor Air Quality Standards. China Standard Press, Beijing (2002)Google Scholar