摘要
目的 模拟不同检测条件下空调送风空气所形成的速度场、温度场,以此评估对空调送风中微生物指标检测的影响并提出采样改进建议。方法 通过建立公共场所室内三维模型并进行计算流体力学仿真,运用K-ε模型对半集中空调3种常用气流组织形式下送风口速度场、温度场等参数进行三维量化处理。结果 通过流体力学仿真,风口距离与风速呈负相关(P<0.05)与温度呈正相关(P<0.05),极值比分别为127.9%和2.4%。影响空调送风中微生物采样的主要因素是采样点的风速,其次是温度。结论 检测机构采样前应进行事先验证,确保空调不同送风口采样点风速和温度的一致性。
Objective This paper simulates the velocity field and temperature field formed by the air supply air of air conditioning under different detection conditions, so as to evaluate the impact on the detection of microbial indicators in the air supply, and put forward suggestions for sampling improvement.Methods Through the establishment of indoor three-dimensional model of public places,computational fluid dynamics simulation and K-ε model,this paper quantifies the velocity field and temperature field of air supply outlet under three common air distribution forms of semi central air conditioning.Results Through hydrodynamics simulation, the tuyere distance is negatively correlated with wind speed(P<0.05) and positively correlated with temperature(P<0.05), and the extreme value ratios are 127.9% and 2.4% respectively.Conclusion The main factor affecting the microbial sampling in the air supply of air conditioner is the wind speed at the sampling point, followed by the temperature.Therefore, the testing organization should verify in advance before sampling to ensure the consistency of wind speed and temperature at different air supply outlet sampling points of air conditioner.
作者
周宇
周宏杰
陈文婷
朱波
钱前
ZHOU Yu;ZHOU Hong-jie;CHENG Wen-ting;ZHU Bo;QIAN Qian(Occupational Health and Radiation Health Department,Hangzhou Hospital for the Prevention.and Treatment of OCcupation Diseases,Hangzhou,Zhejiang 310014,China)
出处
《中国卫生工程学》
CAS
2022年第4期553-556,560,共5页
Chinese Journal of Public Health Engineering
基金
浙江省医药卫生科技计划项目(2020359541)。
关键词
流体力学
半集中空调
送风空气
微生物
Fluid mechanics
Semi-central air conditioning
Supply air
Microorganism
