Using air curtains to reduce short-range infection risk in consulting ward: A numerical investigation  

作　　者：Jin Ye Hua Qian Jianchao Ma Rong Zhou Xiaohong Zheng 

机构地区：[1]School of Energy and Environment,Southeast University,Nanjing,210096,China [2]Engineering Research Center of BEEE,Ministry of Education of China,Nanjing,210096,China [3]First Affiliated Hospital of Guangzhou Medical University,Guangzhou,510000,China [4]Guangzhou Angel Biosafety Co.,Ltd,Guangzhou,510000,China [5]Jiangsu Provincial Key Laboratory of Solar Energy Science and Technology,Nanjing,210096,China

出　　处：《Building Simulation》2021年第2期325-335,共11页建筑模拟（英文）

基　　金：This work is jointed supported by the National Natural Science Foundation of China(No.51778128);the National Key Research and Development Program of China(No.2018YFC1200100);the Entrepreneurship Leadership Project in Guangzhou Development Zone of China(No.CY2018-003);the Scientific Research Foundation of Graduate School of Southeast University(No.YBPY1903).

摘　　要：Air curtains is promising in reducing the short-range infection risk in hospitals.To quantitatively evaluate its performance,this paper explores air curtains equipped on normal consulting desk to avoid doctor’s direct exposure to the patient exhaled pollutants.A numerical investigation is conducted to evaluate the effects of supply air velocity and angle on cutting off performance.Simulation results show that the average mass fraction of exhaled pollutants decreases significantly(70%–90%)in the consulting ward,indicating satisfying performance of air curtains.Increasing supply air velocity is demonstrated to be conducive in forming full air curtains,whereas an excessively high supply air velocity may be of adverse effects by entraining exhaled flow.Besides,the supply air angle is also critical due to its coupling with supply air velocity.It is found that larger angle(0°–40°)is better where velocity is less than 3 m/s,otherwise a small angle(20°)is preferable where velocity is larger than 3 m/s.Exhaled flow could be well suppressed at the supply air angle 20°but moves over air curtains at 40°.This study can provide effective and intuitive guidance in applying air curtains in consulting wards.

关 键 词：air curtains consulting ward cutting off performance numerical investigation 

分 类 号：R197.38[医药卫生—卫生事业管理] TU834.8[医药卫生—公共卫生与预防医学]