Application Research On Printing Indoor Dispersed Sources Ventilation Environmental Quality

Research shows that people spent 80-90%of a day on work,study and rest in indoor public places,indoor air quality directly affects the human body comfort and health,for a long time,people mainly focus on the indoor thermal comfort condition,but ignore the indoor air pollution,more and more studies also point out that indoor air quality is one of the most important factors of threating human health.At present,the office building of the indoor environment of the thermal comfort study more,but the research on indoor air quality is not much,given that the purpose of the office building is varied,the thermal comfort of indoor environment and air quality requirements are different,especially the printing room in the office building,on the one hand,we need to adjust to the thermal comfort of the environment,on the other hand,during the paper to print and copy,all kinds of pollutants can be released in the process,of which 03 pollutants is worst,so we also need to control the pollutant concentration level.To explore four kinds of air supply(? Square grid floor air supply ?round grid floor air supply ? Grid side air supply ? ceiling round diffuser air supply)for the thermal comfort of indoor environment and air quality qualitatively,and after introducing local exhaust facility,to explore effect of ratio of exhaust air rate and return air capacity for air quality quantitatively,firstly through constructing test-bed for data collection,and then establish mathematical physical model,finally use airpak simulation analysis software for its temperature field and velocity field,and validate similarities and differences between test data and simulated data,which shows they are in good agreement.Furthermore by contrasting,four kinds of air supply scheme under the indoor temperature field in the cooling season and heating season,analyzing the CO2 concentration field and O3 concentration field and air age,Finally,study the variation characteristics of O3 concentration field and age of air in the case of the exhaust.In the article,air distribution simulation analysis in the printing room shows that when the diffuser is ceiling round diffuser air supply,indoor thermal comfort is best,in the human breathing zone,CO2 concentration is in a reasonable range,but the O3 concentration is on the high level,and CO2 concentration level under the condition of heating is lower,but the O3 concentration levels are lower under refrigeration conditions.The O3 concentration can be significantly reduced in the case of the exhaust.,At the same time,by comparing the indoor pollutant concentration distribution characteristics under different working conditions,we found while the ways of air supply are different,but position of exhaust opening is fixed,it is concluded that the pollutant concentration distribution contours roughly,just on the size of the numerical differ,finally,while changing return air opening position,simulation prove that the location of the different return air opening can't effectively reduce the concentration of indoor pollution.and when the exhaust volume is 150m3/h(proportion of exhaust air volume is 43%),it is an economical reasonable exhaust volume.The research and analysis of this paper can provide some reference and basis for future engineering practice.