夏热冬冷地区学生宿舍内不同通风策略气溶胶

Research on the Aerosol Diffusion Characteristics of Different Ventilation Strategies in Student Dormitories in Hot Summer and Cold Winter Areas

摘要:

以人员密集的学生宿舍为研究场所,通过数值模拟方法研究四种通风策略下传染源咳嗽释放气溶胶的扩散特性。结果表明,不同通风策略下,气溶胶在室内的影响范围和质量浓度存在差异,室内通风面积的大小会影响咳嗽气溶胶的扩散速度,通风面积越大,颗粒在室内的扩散速度越快。四种通风策略下室内气溶胶颗粒残余率排序依次为,门窗小缝通风＞开门通风＞开窗通风＞门窗全开通风。在门窗全开通风和门窗小缝通风策略下,房间下铺学生的气溶胶相对捕获率高于上铺学生。这些结果对于了解不同通风策略对室内空气质量和学生健康的影响具有重要意义。

Abstract:

Using densely populated student dormitories as the research site, numerical simulation methods were used to study the diffusion characteristics of infectious cough aerosols under four ventilation strategies. The results indicate that there are differences in the impact range and mass concentration of aerosols indoors under different ventilation strategies. The size of indoor ventilation area will affect the diffusion rate of cough aerosols, and the larger the ventilation area, the faster the diffusion rate of particles indoors. The ranking of indoor aerosol particle residual rates under the four ventilation strategies is as follows: small gap ventilation of doors and windows>open door ventilation>open window ventilation>fully open door and window ventilation. Under the ventilation strategies of fully opening doors and windows and small gaps in doors and windows, the relative aerosol capture rate of students in the lower bunk of the room is higher than that of students in the upper bunk. These results are of great significance for understanding the impact of different ventilation strategies on indoor air quality and student health.