Use of CFD modelling to optimise the design of upper-room UVGI disinfection systems for ventilated rooms
Use of CFD modelling to optimise the design of upper-room UVGI disinfection systems for ventilated rooms
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DOI：
10.1177/1420326x06067353
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发表时间：
2006-08-01
影响因子：
3.6
通讯作者：
Beggs, C. B.
中科院分区：
文献类型：
--
作者：
Noakes, C. J.;Sleigh, P. A.;Beggs, C. B.
在通风的房间安装上层房间紫外线杀菌照射（UVGI）装置有可能减少通过空气传播途径传播感染。然而，这种装置的性能取决于几个因素，包括灯的位置和房间内的通风气流。本研究采用CFD模型，通过考虑通风室内大量空气所接收的UV-C累积剂量来评估UVGI装置的性能。通过评估紫外线剂量而不是由此导致的微生物失活，该方法可用于在设计阶段优化UVGI系统，特别是在生物气溶胶污染物的来源位置未知的情况下。在一个通风的小房间里，研究了灯的位置、灯的功率、通风系统和房间供暖之间的关系。结果表明：低送风、高抽风的UVGI系统优于高送风、近地面抽风的UVGI系统。此外，结果表明，在房间里安装加热器不太可能对性能产生不利影响，并可能促进混合以增加消毒程度。
The installation of upper-room ultraviolet germicidal irradiation (UVGI) devices in ventilated rooms has the potential to reduce transmission of infections by an airborne route. However, the performance of such devices is dependant on several factors including the location of the lamp and the ventilation airflow in the room. This study uses a CFD model to evaluate the performance of UVGI devices by considering the cumulative UV-C dose received by the bulk room air in a ventilated room. By evaluating the UV dose rather than the resulting micro-organism inactivation the methodology can be used to optimise UVGI systems at the design stage, particularly when the source location of bioaerosol contaminants is not known. The study investigates the relationships between the lamp location, lamp power, ventilation system and room heating in a small, ventilated room. The results show that with ventilation air supplied at low level and extracted at high level the UVGI system performs better than with the air supplied at high level and extracted close to the floor. In addition the results show the presence of a heater in the room is unlikely to have a detrimental effect on performance and may promote mixing to increase the extent of disinfection.