In-duct ultraviolet germicidal irradiation systems are effective systems that are used in disinfection of pathogenic particles transported by air that moving through the ventilation systems. Proper design of these systems is quite important for energy consumption and disinfection performance. In this study, effect of four different lamp arrays within a square cross-section ventilation duct on the average UV dose, UV dose distribution and disinfection rate are examined by using computational fluid dynamics. The standard k-ε turbulence model and the discrete phase modeling are used to analyze airflow and particle distribution within the duct, respectively. Also, Discrete Ordinates (DO) radiation model is employed to obtain the irradiation field formed by each UV lamp. It is disclosed that UV lamp arrangement within duct significantly affects UV dose distribution.

管道内紫外线杀菌辐照系统是有效的系统，可用于对通过通风系统移动的空气所输送的病原体颗粒进行消毒。这些系统的正确设计对于能耗和消毒性能非常重要。在这项研究中，通过使用计算流体动力学来检查方形横截面通风管内的四个不同灯阵列对平均紫外线剂量，紫外线剂量分布和消毒率的影响。标准的k-ε湍流模型和离散相模型分别用于分析管道内的气流和颗粒分布。而且，采用离散纵坐标（DO）辐射模型来获得每个UV灯形成的辐射场。