Abstract Modeling of a UV-C LED air treatment duct showed that use of highly reflective duct surfaces significantly increased microbial inactivation and minimized the impact of LED positions on inactivation levels. This result was independent of the number of LEDs used. Four wall reflection resulted in higher inactivation rates than solely side-side or top-bottom surface reflection, but beyond three reflections of intensity the number of LEDs controlled the maximum inactivation. The model consisted of a radiation routine which calculated fluence rate from LED intensities and specular surface reflection, integrated with a fluid flow routine which determined air residence time and an inactivation routine which combined microbe inactivation rate constants with fluence levels. Model predictions compared well with data from a 2-cm square test treatment system that achieved 99.9% inactivation of Staphylococcus aureus at low flow rates. These results can guide treatment system designs and expand modeling capabilities for such systems.

中文翻译：

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表面反射对 UV LED 处理管道中微生物灭活的影响

摘要 UV-C LED 空气处理管道的建模表明，使用高反射性管道表面可显着增加微生物灭活，并将 LED 位置对灭活水平的影响降至最低。该结果与使用的 LED 数量无关。四壁反射比单独的侧面或顶部底部表面反射导致更高的灭活率，但超过三个强度反射，LED 的数量控制了最大的灭活。该模型由根据 LED 强度和镜面反射计算注量率的辐射程序、确定空气停留时间的流体流动程序和结合微生物灭活速率常数与注量水平的灭活程序组成。模型预测与来自 2 平方厘米测试处理系统的数据进行了很好的比较，该系统在低流速下实现了 99.9% 的金黄色葡萄球菌灭活。这些结果可以指导处理系统设计并扩展此类系统的建模能力。