Performance evaluation of a miniature UV particle charger

IF 3.9 3区环境科学与生态学 Q2 ENGINEERING, CHEMICAL

Journal of Aerosol Science Pub Date : 2025-02-19 DOI:10.1016/j.jaerosci.2025.106550

Jitong Zhou , Gehang Huang , Xiaoqi Lei , Qiang Sun , Fajun Yu , Huaqiao Gui , Jianguo Liu , Huanqin Wang , Da-Ren Chen

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引用次数: 0

Abstract

A mini-UV aerosol charger was designed, and its charging performance was investigated in this work. The performance of a mini-UV aerosol charger was evaluated using DMA-classified silver (Ag) particles in the sizes ranging from 7 to 100 nm under varying exposure times and irradiation intensities. The intrinsic and extrinsic charging efficiencies, and charge distribution of test particles under different operational conditions were measured. It was found that the particle charging with 5 W UV lamps, emitting both wavelengths of 185 and 254 nm, achieved the optimal performance for the charger when operated at a flowrate of 0.3 LPM. The intrinsic and extrinsic charging efficiencies of sodium chloride (NaCl) and Di-Ethyl-Hexyl-Sebacat (DEHS) particles were also measured. The extrinsic charge distribution of test particles was lastly measured. This study further proposed the improvement of the photo-charging model based on the Fowler-Nordheim law (for the calculation of charge distribution of particles) by considering the field distribution of particle residence time in the charger.

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来源期刊

Journal of Aerosol Science 环境科学-工程：化工

CiteScore

8.80

自引率

8.90%

发文量

127

审稿时长

35 days

期刊介绍： Founded in 1970, the Journal of Aerosol Science considers itself the prime vehicle for the publication of original work as well as reviews related to fundamental and applied aerosol research, as well as aerosol instrumentation. Its content is directed at scientists working in engineering disciplines, as well as physics, chemistry, and environmental sciences. The editors welcome submissions of papers describing recent experimental, numerical, and theoretical research related to the following topics: 1. Fundamental Aerosol Science. 2. Applied Aerosol Science. 3. Instrumentation & Measurement Methods.