Comparison And Analysis Of Indoor Particulate Matter Distribution

In modern society,people spend about 70%to 90%of their time indoors.Office workers work in the office.Many studies have shown that indoor particulate matter is harmful to the human body,so it is meaningful to analyze the concentration distribution of particulate matter in the office.This study is based on the office of Taiyuan University of Technology.Appropriate measuring points are selected by considering the size of the room and the location of the built-in office supplies.This paper uses the CLJ-BII laser dust particle counter to have particle diameters of d_p>10?m,>5?m,>3?m,>1?m.The concentration of the particulate matter was measured as an object of analysis,and the concentration of the indoor particulate matter was measured.The experiment is divided into closed working conditions and natural ventilation conditions.By comparing and analyzing the concentration of particulate matter outside the window and the concentration distribution of indoor particulate matter under different meteorological conditions,the distribution of particulate matter concentration in special weather in winter is discussed.The simulation utilizes FLUENT software.The FLUENT software uses a standard k-?model to describe the flow of natural ventilation airflow in the office.FLUENT software uses the DPM model to simulate indoor particle concentration distribution.During the simulation,the window air inlet speed was set to 0.3 m/s.The results show that the concentration of particulate matter outside the window is the lowest,and the concentration of particulate matter is the highest in sunny days.In the case of excellent air quality,the concentration of particulate matter near the window will be less,suitable for office;in a closed room,at a height of z=1.1m In the plane,y=2.6m,x=3.5m,the concentration of particles is the lowest;and in the plane of z=1.7m,the concentration of particles at x=2m is the smallest.Comparing the simulation results with the experimental data,it is proved that the mathematical model designed in this paper can effectively analyze the distribution of particles in the office.