交通建筑中新型冠状病毒的空气传播风险与室内环境控制策略*
Airborne transmission risk of 2019-nCoV and indoor environment control strategy in transportation buildings
摘要：
对交通建筑中新型冠状病毒传播风险及防控思路进行了梳理，分析了不同类型交通建筑中人员密度变化规律、感染者比例及通风稀释倍数。基于感染概率评价模型及安全稀释倍数指标，对不同类型交通建筑在不同运营模式下的室内感染风险进行了评估。结果表明，在环境控制手段良好的前提下，航站楼及火车站的主要旅客停留区域总体安全，新型冠状病毒感染的概率较低。提出了基于CO2浓度的室内环境控制策略，建议根据室内CO2浓度适时调整通风量，以保证室内达到安全水平，为当下全国有序复工复产背景下的交通建筑疫情防控提供运行指导。
Abstract：
Presents the transmission risk and control strategy of 2019-nCoV in transportation buildings. Analyses the change rule of occupancy density, the proportion of infected persons and the ventilation dilution ratio in different types of transportation buildings. According to the infection probability evaluation model and safety dilution index, evaluates the indoor infection risk of different types of transportation buildings at different operation modes. The results show that by good environmental control means, the main passenger stay areas of the terminals and the railway stations are generally safe, with the low probability of 2019-nCoV infection. Proposes an indoor environmental control strategy based on the CO2 concentration. Suggests that the ventilation rate should be adjusted timely according to the indoor CO2 concentration to ensure the indoor safety level, which provides operational guidance for the 2019-nCoV prevention in transportation buildings under the background of orderly resumption of work and production in China.
Keywords:2019-nCoV, transportation building, airborne transmission, ventilation dilution ratio, infection risk