An air distribution optimization of hospital wards for minimizing cross-infection
An air distribution optimization of hospital wards for minimizing cross-infection
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DOI：
10.1016/j.jclepro.2020.123431
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发表时间：
2021-01-10
影响因子：
11.1
通讯作者：
Chen, Yong-Ping
中科院分区：
文献类型：
--
作者：
Wang, Ji-Xiang;Cao, Xiang;Chen, Yong-Ping
目前，“2019-CoV-2”疫情已在全球肆虐数月，造成大量死亡、巨大恐慌、混乱，以及不可估量的经济损失。这种新出现的流行病病毒多年来一次又一次地出现，导致类似的破坏性后果。空气在人与人之间的传播是病毒迅速传播的主要原因。阻断空气传播应该是遏制疫情蔓延的重要措施。考虑到医院是患者之间最容易发生大规模交叉感染的地方，新发病毒往往是以变相的方式传播的，本文对中国某普通三床位医院病房的气流组织进行了优化。使用欧拉-拉格朗日方法，模拟了假定为病毒携带者的患者的打喷嚏过程，这是引发交叉感染的常见事件的原因。计算了释放的有毒颗粒物的运动轨迹和接近同一病房内其他人的概率。提出了两个评价参数：总最大时间(TMT)和总颗粒浓度(OPC)，分别反映颗粒的流动性和引起交叉感染的概率。通过三阶段分析，确定了TMT和OPC最低的相对优化的气流组织方案。结果表明，建议采用自下而上的气流组织方案，最大限度地减少交叉感染。(C)2020爱思唯尔有限公司。保留所有权利。
Currently, the "2019-CoV-2" has been raging across the world for months, causing massive death, huge panic, chaos, and immeasurable economic loss. Such emerging epidemic viruses come again and again over years, leading to similar destructive consequences. Air-borne transmission among humans is the main reason for the rapid spreading of the virus. Blocking the air-borne transmission should be a significant measure to suppress the spreading of the pandemic. Considering the hospital is the most probable place to occur massive cross-infection among patients as emerging virus usually comes in a disguised way, an air distribution optimization of a general three-bed hospital ward in China is carried out in this paper. Using the Eulerian-Lagrangian method, sneeze process from patients who are assumed to be the virus carrier, which is responsible for a common event to trigger cross-infection, is simulated. The trajectory of the released toxic particle and the probability of approaching others in the same ward are calculated. Two evaluation parameter, total maximum time (TMT) and overall particle concentration (OPC) to reflect the particle mobility and probability to cause cross-infection respectively, are developed to evaluate the proposed ten air distributions in this paper. A relatively optimized air distribution proposal with the lowest TMT and OPC is distinguished through a three-stage analysis. Results show that a bottom-in and top-out air distribution proposal is recommended to minimize cross-infections. (c) 2020 Elsevier Ltd. All rights reserved.