Research On The Concentration Control Simulation Of Particulate Matter In Air Conditioning Room

In recent years, along with the increasing seriousness of atmospheric pollution and the increasing indoor pollutants, indoor air quality gets more and more attention from people. Data has shown that indoor particulate matter pollutants accounts for 76 percent of the indoor air pollutants, and from 70 to 90 percent of the time, most of people stay indoors, so the indoor particulate matter pollution threatens the health of human. Papers analyzed and simulated the concentration variation of indoor particulate matter pollutants, validated the relation of the concentration variation about indoor particulate matter pollutants, and studied the control method of the concentration variation about indoor particulate matter pollutants. All of this is of great significance.Firstly, this paper introduces the indoor particle concentration change rule, deduces the primary return air system, air-water system and independent cooling air conditioning system of indoor particulate matter concentrations change relation; lists the values or algorithm of the outdoor atmospheric particulate concentration, initial density of indoor particulate matter and indoor placing signage at produce values in equations. Secondly, four simulation models each has the particles source of the body’s own, the particles source of smoke, the particles source of cooking and the particles source of office equipments are established respectively for different air conditioning system and the corresponding main indoor particulate matter pollution source, according to the indoor particle concentration change relation. Finally, come to the conclusion through simulation: to address the three kinds of indoor air pollution model in chapter three, the concentration of indoor particulate matter pollutants meets the national standard when the particulate matter caused by the sources of indoor particulate matter pollutants is less than the great amount of dust. Taking a conference room which the sources of indoor particulate matter pollutants is smoking as the research object, the article simulated the indoor air distribution under the displacement ventilation and mixing ventilation by Fluent, and obtained that the concentrations of PM2.5 about indoor workspace is 0.02μg/m3 under the displacement ventilation mode, it meets the national standards. Take a store with return air conditioning for example, drawing forth the minimum air changes through the formula, and deducing the relationship between minimum air changes and store personnel density. Proving that we should select the fresh air and return air filter in the market place according to the effect of weight from filtration efficiency of the air filter and return air filter on C∞.