广州商场建筑总挥发性有机化合物全年检测及时空分布特征研究

Study on the spatial and temporal distribution characteristics of total volatile organic compounds in Guang Zhou shopping mall buildings

为了进一步研究商场建筑室内总挥发性有机物(Total Volatile Organic Compounds,TVOC)的影响因素进而改善商场空气质量,以广州两个典型的商场建筑为对象,开展室内TVOC的全年测试。分析了商场建筑实际运维下TVOC的季节变化和日变化等时间分布特征,以及随购物功能区、楼层变化的空间分布特征;探讨了室内外TVOC变化关系,以及其他环境参数、室内环境控制系统等对TVOC分布的影响;提出了商场建筑室内环境改善及设备系统运行的合理建议。

To understand the distribution characteristics of total volatile organic compounds in shopping mall buildings in Guangzhou,two typical shopping mall buildings were selected for four rounds of testing by season,moment,and functional area.The results show that the average TVOC mass concentration in mall A is 0.18 mg/m3,and the exceeding standard rate is only 1.78%;mall B is affected by the renovation,and the average TVOC mass concentration is 1.13 mg/m3,and the exceeding standard rate reaches 57.69%.The temporal characteristics show that the difference in mass concentration between the three seasons of A mall in spring,summer,and autumn is not significant,and the mass concentration in winter is slightly lower than that in other seasons;B mall exceeds the standard seriously in spring,summer and autumn,but not in winter.The TVOC mass concentrations in both malls are at high values at the beginning of the measurement,and the mass concentrations increase at 12:00 and 18:00,respectively.The spatial characteristics show that the difference in mass concentration between the counter and the floor of mall A is small;the clothing and shoes and bags areas of mall B are significantly higher than other areas,and the mass concentration on the first floor is higher.TVOC mass concentration in shopping mall A is positively correlated with temperature and humidity,but not significantly correlated with wind speed.Due to the influence of a large number of pollution sources emanating from the decoration of shopping mall B in the early stage of the test,it is difficult to reflect the influence of other environmental parameters on its mass concentration value under the actual operation and maintenance of shopping mall,so this paper does not do research.This research investigation provides guiding suggestions for the operation and maintenance of central air conditioning and ventilation control in shopping mall buildings.