PDF(Pubmed)
Abstract：
People in cities use elevators daily. With the COVID-19 pandemic, there are more worries about elevator safety, since elevators are often small and crowded. This study used a proven CFD model to see how the virus could spread in elevators. We simulated five people taking in an elevator for 2 min and analyzed the effect of different factors on the amount of virus that could be inhaled, such as the infected person\'s location, the standing positions of the persons, and the air flow rate. We found that the position of the infected person and the direction they stood greatly impacted virus transmission in the elevator. The use of mechanical ventilation with a flow rate of 30 ACH (air changes per hour) was effective in reducing the risk of infection. In situations where the air flow rate was 3 ACH, we found that the highest number of inhaled virus copies could range from 237 to 1186. However, with a flow rate of 30 ACH, the highest number was reduced to 153 to 509. The study also showed that wearing surgical masks decreased the highest number of inhaled virus copies to 74 to 155.
摘要：
城市里的人们每天都在使用电梯。随着COVID-19大流行，人们对电梯安全有更多的担忧，因为电梯通常又小又拥挤。这项研究使用了经过验证的CFD模型来观察病毒如何在电梯中传播。模拟5人乘坐电梯2分钟,分析不同因素对可吸入病毒量的影响,如感染者的位置，人的站立位置，和空气流速。我们发现，感染者的位置和他们站的方向极大地影响了病毒在电梯中的传播。使用流速为30ACH（每小时换气）的机械通气可有效降低感染风险。在空气流速为3ACH的情况下，我们发现吸入病毒的最高拷贝数可以从237到1186。然而,流量为30ACH，最高数字减少到153至509。研究还表明，戴口罩将吸入病毒的最高数量减少到74至155。
