Investigation and Analysis of Indoor Air Quality in Shopping Malls based on Carbon Dioxide and Formaldehyde

• Main Authors: Yu-Hsiang Weng, 翁煜翔
• Other Authors: Wing-Ping Liao
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/61918941508924155654

碩士 === 國立中興大學 === 環境工程學系所 === 105 === People spend most of the time in indoor area every day, and for maintaining indoor spacial comfortableness, the air-conditioning is necessary for regulating indoor environment. In recent years, as the public awareness of environmental protection rise and the increasing living environment quality requirements, the marketplace, a public site with masses in and out frequently will be crowed with people in national holidays must be improved in terms of its indoor environmental comfortableness. The public will feel unpleasant when there are in an indoor environment with suffocating air that will exert significant impacts on mental health. The research subjects in this research include all representative marketplaces in Taichung with relatively extensive target customers and the first batch of marketplaces subject to Indoor Air Quality Rules released by Environmental Protection Administration (EPA) are the major inspection objects, including department stores and hypermarkets. After preliminary inspection on carbon dioxide and formaldehyde and the indoor air quality of sites with higher values are monitored to understand the pollution characteristics and speculate pollution sources, with which the corrective measures for indoor air quality are proposed to effectively improve the air quality status of the marketplaces. The average carbon dioxide ranges from 632 ppm to 928 ppm and some parts of marketplace is often filled with higher concentration of carbon dioxide. The formaldehyde concentration demonstrates that three out of five department stores exceed the standard concentration, and twelve out of sixteen hypermarkets exceed the standard one. The excessive carbon dioxide concentration is arising out of exorbitant gather density, failure in bringing in fresh air, poor ventilation and air change which further lead to the rise of carbon dioxide concentration. From the continuous monitoring carbon dioxide results, the carbon dioxide concentration rises because the air regenerating devices are not opened yet under non-business hours. And the carbon dioxide concentration considerably drops after the devices are started up. In addition, the carbon dioxide concentration changes with the number of masses in the afternoon. The displayed commodities, cleaning supplies, cosmetics and inside decorations are principal sources of formaldehyde in the marketplaces. Moreover, the excellent ventilation fails to bring away pollutants in timely manners. There are pollutants in the marketplaces that unceasingly release formaldehyde and Total Volatile Organic Compounds (TVOC); in consequence, control on pollution sources is the best solution for removing formaldehyde and TVOC.