In this study, we investigated the effects of environmental factors such as airflow velocity, relative humidity (RH), temperature, and duct reflectance on the performance of in‐duct UVC lamps. Staphylococcus epidermidis, Pseudomonas alcaligenes, and Escherichia coli were used as the test bacteria. The UV irradiance, disinfection efficacy, and UV susceptibility constant (Z value) of the test bacteria were experimentally determined. The results showed that the UV disinfection efficacy decreased as the airflow velocity and RH increased. The maximum UV disinfection efficacy was obtained at temperature of 20‐21°C compared with the performance at lower temperature (15‐16°C) and higher temperature (25‐26°C). When the RH increased from 50% to 90%, the Z values of airborne bacteria reduced by 40%, 60%, and 38% for S epidermidis, P alcaligenes, and E coli, respectively. Besides, susceptibility constants had lower values under both cooling temperature (15‐16°C) and heating temperature (25‐26°C) compared with that under the temperature of 20‐21°C. It was observed that S epidermidis generally had the highest resistance to the UV irradiance. The results also showed that the UV disinfection efficacy was lower in the duct with a black surface than in the clean duct.

中文翻译：

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在不同的环境条件下，在湍流气流中通过感应紫外线灯进行消毒。

在这项研究中，我们研究了环境因素（如气流速度，相对湿度（RH），温度和管道反射率）对感应UVC灯性能的影响。表皮葡萄球菌，产碱假单胞菌和大肠杆菌用作测试细菌。实验确定了测试细菌的紫外线辐射，消毒功效和紫外线敏感性常数（Z值）。结果表明，随着气流速度和相对湿度的增加，紫外线消毒的功效降低。与在较低温度（15-16°C）和较高温度（25-26°C）下的性能相比，在20-21°C的温度下可获得最大的紫外线消毒功效。当相对湿度从50％增加到90％时，Z表皮葡萄球菌，产碱假单胞菌和大肠杆菌的空气传播细菌值分别降低40％，60％和38％。此外，与20-21°C的温度相比，在冷却温度（15-16°C）和加热温度（25-26°C）时磁化常数的值较低。观察到表皮葡萄球菌通常对紫外线辐射具有最高的抵抗力。结果还表明，具有黑色表面的管道中的紫外线消毒功效低于清洁管道中的紫外线消毒功效。