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.
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total decay rate
Document Type: Research Article
School of Architecture, Harbin Institute of Technology, Harbin, China
School of Civil Engineering, Dalian University of Technology, Dalian, China
Harbin Multi-Phase Water Treatment Tech. Co., Ltd, Harbin, China
May 3, 2020
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