辐射吊顶对负压隔离ICU热环境和排污效率的影响  

Effect of Radiant Ceiling on Thermal Environment and Contaminant Removal Efficiency in Infectious Isolation ICU

作　　者：何平 钱华[1] 陈永强 He Ping;Qian Hua;Chen Yongqiang(School of Energy and Environment,Southeast University,Nanjing,210096,China;Guangdong Huyanfeilan Technology Co.,Ltd.,Foshan,528200,China)

机构地区：[1]东南大学能源与环境学院,南京210096 [2]广东呼研菲兰科技有限责任公司,佛山528200

出　　处：《制冷学报》2022年第6期83-89,共7页Journal of Refrigeration

摘　　要：负压隔离重症加强护理病房(infectious isolation intensive care unit,简称:负压隔离ICU)是为传染病重症患者提供医疗护理的隔离场所,在疫情防控中起到重要作用。本文通过计算流体力学(CFD)模拟了辐射吊顶加新风系统在负压隔离ICU中的应用,探讨了辐射吊顶供冷供热量和排风口高度对室内热环境和排污效率的影响。并对实验进行了模拟,验证了模型的准确性。结果表明:夏季工况时,随着辐射吊顶供冷量的提高,房间垂直温差减少5%~58%,患者附近吹风感指数下降68%~86%,排污效率降低13%~50%。夏季排风口设置在房间上部有利于气态污染物和房间热量的排出。冬季使用辐射吊顶配合上排风,可以使房间垂直温差降低7%~43%的同时提高排污效率43%~59%;配合下排风,则会降低排污效率。The infectious isolation intensive care unit(ICU)is an isolation unit where medical care is provided for patients with severe infectious diseases,which plays an important role in epidemic prevention and control.In this study,the application of a fresh air system combined with a radiant ceiling in an infectious isolation ICU was simulated using computational fluid dynamics models.The effects of different heating or cooling capacities of the radiant ceiling and heights of exhaust outlet on the indoor thermal environment and contaminant removal efficiency were examined.Experiments were also conducted to verify the accuracy of the model.The vertical temperature difference in the room,draft rate near the patients,and contaminant removal efficiency decreased by 5%-58%,68%-86%,and 13%-50%,respectively,with the increase in the cooling capacity of the radiant ceiling in the summer.The exhaust outlet installed on the upper part of the room discharged gaseous pollutants and heat during the summer.In winter,the use of the radiant ceiling combined with the exhaust outlet reduced the room vertical temperature difference by 7%-43%and improved the contaminant removal efficiency by 43%-59%.However,the combined use of the radiant ceiling and exhaust outlet in the lower part of the room in the winter reduced the contaminant removal efficiency.These results are applicable to the operation of fresh air systems combined with a radiant ceiling in infectious isolation ICUs.

关 键 词：辐射吊顶 负压隔离ICU 排污效率 吹风感指数 垂直温差 

分 类 号：TB611[一般工业技术—制冷工程] TU831.5[建筑科学—供热、供燃气、通风及空调工程]