Abstract
Corona discharge technology is used widely for air purification in laboratory experiments and industry. On the other hand, corona discharge technology has the disadvantage of requiring large-sized electrodes. Therefore, research is needed to reduce the size of the electrodes. In this study, circular hole aluminum electrodes and an air purifier system were designed to reduce the size of the electrodes. Several sets of power conversions were performed to generate a corona discharge. The system consisted of a half bridge inverter, step-up transformer, and Cockcroft Walton circuit. The range of input and output voltages was 30–70 V and 20–25 kV, respectively. A corona discharge was generated by the output voltage. The system could remove smoke in less time with a combination of 13 kHz and an electrode with a hole diameter of 0.2 cm than with the other combinations. The electrode hole diameter affected the removal time of species such as hydrogen carbon hydrogen oxygen (HCHO, formaldehyde), total volatile organic compounds (TVOC), and fine dust, which was confirmed by laboratory experiments. Mathematical derivation and experiments were carried out to prove the validity of the approach; the Clean Air Delivery Rate (CADR) index was 480 μm/m3.
Highlights
We focused on the elimination of HCHO, TVOC, which are the most harmful organic substances for the human body and focusing on fine dust
Fine dust is a large problem in modern society
This paper proposed a method for removing fine dust using a corona discharge
Summary
With the development of industry, the use of fossil fuels and the demand for personal vehicRleecsenartley,inwcirtehatshinegd. eTvheelorpefmoreen,ttohfeinqduuasnttriyty, thoef ufisneeodf ufostssiisl faulesols ianncdretahseindge.mManodst ffoirnepedrusosnt ails vceohmicpleossaerde oinfcsreualsfaintegs. Even on a clear day without smog, these fine particles can enter the respiratory tract when their concentration is high If this occurs, the dust can be discharged through the respiratory tract depending on its size. Once fine dust enters our body, the cells responsible for the immunity function act to remove dust and protect our body, a side effect of which is inflammation These inflammatory reactions in the organs of our body, such as airways, lungs, cardiovascular, and brain can cause asthma, respiratory or cardiovascular diseases [3]. Fine dusts affect the human body and industries and ecosystems. We focused on the elimination of HCHO, TVOC, which are the most harmful organic substances for the human body and focusing on fine dust. The spark discharge is a monotonic property that occurs instantaneously, other than arc discharge [11]
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