直流式双风机隔离小室运行效果模拟分析

直流式双风机隔离小室是一种为常态化防疫设计的封闭小室,在医院疫情防控期间可将病患与正常人分隔开来,能根据污染源的不同位置,通过调节风机转速使小室维持正压或负压状态以达到隔离或防护的作用.为了确定设计参数是否满足室内空气安全性和人体热舒适性的要求,采用计算流体力学CFD方法对小室内空气的温度场、速度场以及负压条件下病原体...

Simulation Analysis of the Operation Effect of Uniflow Double Fans in Isolated Chamber

The uniflow double fans isolation chamber is a closed chamber designed for normalized epidemic prevention.During the epidemic and control period in the hospital,patients can be separated from normal people,and according to different locations of the pollution source,the fan speed can be adjusted to maintain a positive or negative pressure in the chamber to achieve protection or isolation.In order to determine whether the design parameters meet the requirements of indoor air safety and human thermal comfort,this paper uses computational fluid dynamics CFD method to simulate the air temperature field,velocity field and the movement trajectory of pathogen particles under the conditions of negative pressure of the small room.The simulation results show that under the design parameters of air supply temperature of 25℃and average wind speed of 0.25m/s,the vertical velocity field and temperature field are relatively uniform in the small room,and the dissatisfaction rate of the human body to the blowing sensation is about 10%and the dissatisfactory rate with the vertical temperature difference is below 1%;under the negative pressure condition of 130m³/h of air supply,5Pa between indoor and outdoor pressure,and 0.018m² of gap area,pathogen particles in the small room cannot escape outside.