| The problem of indoor air quality is an important issue that human society must face today.People get a better life at the same time,began to pay attention to the quality of the indoor environment.Studies that there are a lot of contaminants in the building that directly threaten human health.Therefore,take all kinds of effective measures to solve the problem of indoor air quality is an important issue of human society.In August 2010 a new "Civil Construction Project Indoor Environmental Pollution Control Norm"(GB50325-2010)on the choice of decoration materials and decoration materials harmful substances made more stringent requirements was issued by the relevant state departments.Studies that in a certain decoration area on the use of materials exceeds a certain limit,it will cause indoor pollution,even if using the standard materials in the decoration.Indoor particulate matter composition is complex,the nature of a variety is also a great harm to pollutants.Particles size less than 10 ?m on the human body is more serious.Smokes produced by smoking and cooking are mostly in the range of these fumes,and these two sources of pollution in daily life is the most common indoor particulate matter sources,should be given a high degree of attention.First of all,this paper divides four kinds of working conditions to simulate the relationship between the density of formaldehyde in the living room and the quality of the indoor air after the decoration of with different area under natural ventilation by CFD technology.Secondly,this paper studied the time that required for the room to achieve the formaldehyde concentration limit by natural ventilation.And then confined for 12 h four sub-conditions studied at this time indoor formaldehyde distribution,and further derived indoor formaldehyde concentration and the relationship between the amount of plate,and ultimately come to indoor pollution content does not exceed the national standard limit value plate The maximum limit ofuse,as well as distribution of indoor floor formaldehyde distribution rules.Consider two weather conditions for indoor particulate matter contamination,ie,non-hazy days and hazy days.In non-haze days,can be natural ventilation.So simulate the natural ventilation of indoor smoke generated by smoking indoor distribution.In foggy days,neither natural ventilation nor mechanical ventilation.So simulate the indoor smoke generated by closed smoking room distribution.There are two conditions in each of the two cases,one in the living room and two in the living room.As most of the smoking in the living room,so the simulation of particles only take this living room living room experiments to calculate the particle size distribution of different particle size distribution.Finally,the conclusion is drawn that the concentration of particulate matter in indoor air is closely related to indoor smoke source,and the relationship between the concentration of particulate matter in indoor air and outdoor weather conditions.By studying the relationship between the usage of indoor board and the concentration of formaldehyde,it is concluded that the maximum content of formaldehyde in the air when the volume content in the air does not exceed the national standard limit value,and the control of the usage of the board in the actual decoration process is certain The reference meaning.By studying the influence of different indoor sources on the indoor environment,as well as the concentration and movement distribution of particles with different particle sizes,the conclusions obtained are helpful to the prevention and elimination of indoor particulate matter and the design of reasonable ventilation mode significance. |
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