Xiao Ye, Lv Yang, Zhou Yuwei, Liu Huan, Liu Jing
School of Architecture, Harbin Institute of Technology, Harbin, China.
Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, Harbin, China.
Int J Environ Health Res. 2020 Jun;30(3):251-267. doi: 10.1080/09603123.2019.1591351. Epub 2019 Mar 28.
This study aimed to investigate the influence of surface deposition and coagulation on indoor particles larger than 0.25 μm by conducting tests in a room-sized enclosed chamber under different air temperatures. The particles, processed dust intercepted by indoor air conditioners, were generated using an aerosol generator. The deposition rate and coagulation coefficients were used to estimate the efficiency of indoor particle surface deposition and coagulation in this study. The results show that the deposition rates increase as the air temperature rises, and high temperatures can also increase the coagulation coefficient. In addition, test results show that the enhancement of indoor air mixing intensity can increase both the deposition rates and the coagulation efficiencies. The contribution of coagulation to the total decay of indoor particle concentrations decreases over time, and the contribution is higher for particles in the range of 0.25-0.5 μm than those in the range of 0.5-1.0 μm.
本研究旨在通过在不同气温下的房间大小的密闭舱室中进行测试，调查表面沉积和凝聚对大于0.25μm的室内颗粒物的影响。使用气溶胶发生器产生颗粒物，即室内空调截留的处理过的灰尘。在本研究中，沉积速率和凝聚系数用于估计室内颗粒物表面沉积和凝聚的效率。结果表明，沉积速率随气温升高而增加，高温也会增加凝聚系数。此外，测试结果表明，增强室内空气混合强度可同时提高沉积速率和凝聚效率。凝聚对室内颗粒物浓度总衰减的贡献随时间降低，且对于粒径在0.25 - 0.5μm范围内的颗粒物，其贡献高于粒径在0.5 - 1.0μm范围内的颗粒物。
