负压隔离病房气流组织数值模拟研究及对比分析

Numerical Simulation and Comparative Analysis of Air Distribution in Negative Pressure Isolation Wards

合理的气流组织,在保持通风量不变的前提下,对于提高负压隔离病房通风效率,减少医护人员感染风险具有重要意义。在总结文献资料的基础上,归纳出八种典型风口布置形式,对其进行气流组织模拟研究。通过对比这八种风口布置形式的气流流动轨迹、污染物质量分布、污染物浓度,得出顶侧送风,下侧排风的风口组合方式较其他气流组织形式,在负压隔离病房的防护通风中,具有更好的稀释作用和气流流动轨迹。

Under the premise of keeping the ventilation volume unchanged, reasonable air distribution is of great significance to improve the ventilation efficiency of negative pressure isolation ward and reduce the infection risk of medical staff. On the basis of literature review, this paper sums up eight typical tuyere layouts and studies their air distribution. By comparing the air flow trajectory, pollutant mass distribution and pollutant concentration of the eight types of tuyere arrangement, this paper concludes that the combination of top side air supply and bottom side air exhaust has better dilution effect and airflow flow trajectory in the protective ventilation of negative pressure isolation ward than other air flow organization forms.