Numerical Simulation Of Indoor Particle Distribution In Winter Heating Rooms

The constant emergence of smog weather makes people more and more demanding of the indoor environment,especially in the northern heating buildings,not only to consider the thermal comfort of the room,but also to pay attention to the distribution of indoor particles closely related to indoor air quality.The difference of heating methods will directly lead to the difference of indoor flow fields,thereby affecting the movement of indoor particles,therefore,the indoor particle distribution of winter heating rooms is studied,and giving then the better heating methods have a certain engineering practical significance.In this paper,the experimental study of particle distribution in the floor radiant heating room was firstly carried out in the artificial environment laboratory,the reliability of the DPM in simulating the indoor particle distribution of the heating room was verified by comparing the experimental values with the simulated values and selecting the appropriate turbulence model and radiation model.Secondly,taking a heating bedroom as the research object,this paper analyzes three different heating methods of radiator heating,low-temperature hot water floor radiant heating,and low-temperature electric heating film heating,the indoor flow field and indoor particle distribution under different heating methods were numerically simulated,and the lowtemperature hot water floor radiant heating method was compared from the two aspects of thermal comfort and indoor air quality,on this basis,the impact of different outdoor pollution levels and different floor temperatures on indoor particle distribution was analyzed.The results show that the increase in outdoor pollution will lead to different degrees of increase in indoor particle concentration,and the indoor particle concentration will change in a consistent trend;27°C～29°C is a more suitable floor temperature,which can not only ensure the thermal comfort of personnel,but also ensure the good air quality of the room.Finally,in view of the better heating method,the influence of the placement of the air purifier on the distribution of indoor particles is studied,and the purification effect of the air purifier on the indoor particles under the preferential placement of the air purifier is analyzed under different pollution levels outdoors,and the application of air purifiers in heating rooms is proposed.