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首页> 外文期刊>Building and Environment >Indoor airborne disinfection with electrostatic disinfector (ESD): Numerical simulations of ESD performance and reduction of computing time
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Indoor airborne disinfection with electrostatic disinfector (ESD): Numerical simulations of ESD performance and reduction of computing time

机译：使用静电消毒器（ESD）的室内空气中消毒：ESD性能的数值模拟和计算时间的减少

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摘要

Airborne transmissions of infectious disease (e.g. SARS-CoV-2) in indoor environments may induce serious threat to public health. Air purification devices are necessary to remove and/or inactivate airborne biological species from indoor air environment. Corona discharge in an electrostatic precipitator is capable of removing particulate matter and disinfecting biological aerosols to act as electrostatic disinfector (ESD). The ions generated by ESD can effectively inactivate bacteria/viruses. However, the available research rarely investigated disinfection effect of ESD, and it is urgent to develop quantitative ESD design methods for building mechanical ventilation applications. This study developed an integrated numerical model to simulate disinfection performance of ESD. The numerical model considers the ionized electric field, electrohydrodynamic flow, and biological disinfection. The model prediction was validated with the experimental data (E. coli): Good agreement was observed. The validated model then was used to study the influences of essential design parameters (e.g. voltage, inlet velocity) of ESD on disinfection efficiency. The effects of modeling of electrophoretic force and EHD (electrohydrodynamic) flow patterns on disinfection efficiency and computing time were also analyzed. The disinfection efficiency of well-designed ESD (with space charge density of 3.6 x 10- 06 C/m3) could be as high as 100%. Compared with HEPA, ESD could save 99% of energy consumed by HEPA without sacrificing disinfection efficiency.
机译：室内环境中传染病（例如SARS-COV-2）的空气传输可能会对公共卫生产生严重威胁。空气净化装置是从室内空气环境中去除和/或灭活空气中的生物物种。静电除尘器中的电晕放电能够去除颗粒物质和消毒生物气溶胶以充当静电消毒剂（ESD）。 ESD产生的离子可以有效地灭活细菌/病毒。然而，可用的研究很少研究ESD的消毒效果，迫切需要开发用于建筑机械通风应用的定量ESD设计方法。本研究开发了一种集成的数值模型来模拟ESD的消毒性能。数值模型考虑电离电场，电液动力流动和生物消毒。使用实验数据（大肠杆菌）验证了模型预测：观察到良好的一致性。然后，验证的模型用于研究ESD对ESD的基本设计参数（例如电压，入口速度）对消毒效率的影响。还分析了电泳力和EHD（电液动力学）流动模式对消毒效率和计算时间的影响。精心设计的ESD的消毒效率（空间电荷密度为3.6×10-06c / m 3）可以高达100％。与HEPA相比，ESD可以节省HEPA消耗的99％，而不会牺牲消毒效率。

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