Operating Problems of Arc Plasma Reactors Powered by AC/DC/AC Converters

Komarzyniec, G.; Aftyka, Michał

doi:10.3390/app10093295

Cited by 6 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…GAD is synthesized in a reactor with two or more separate electrodes that function at a high potential difference of 9 kV and 100 mA in an open‐air environment (Komarzyniec & Aftyka, 2020). An inlet gas mixed with humid air is surged into the discharge gap between the electrodes, causing an arc between the thinnest inter‐electrode area, which is eventually blown by the inlet gas.…”

Section: Cold Plasma Techniquementioning

confidence: 99%

Recent developments in cold plasma‐based enzyme activity (browning, cell wall degradation, and antioxidant) in fruits and vegetables

Punia

Trif

Özoğul

et al. 2022

Comp Rev Food Sci Food Safe

View full text Add to dashboard Cite

According to the Food and Agriculture Organization of United Nations reports, approximately half of the total harvested fruits and vegetables vanish before they reach the end consumer due to their perishable nature. Enzymatic browning is one of the most common problems faced by fruit and vegetable processing. The perishability of fruits and vegetables is contributed by the various browning enzymes (polyphenol oxidase, peroxidase, and phenylalanine ammonia‐lyase) and ripening or cell wall degrading enzyme (pectin methyl‐esterase). In contrast, antioxidant enzymes (superoxide dismutase and catalase) assist in reversing the damage caused by reactive oxygen species or free radicals. The cold plasma technique has emerged as a novel, economic, and environmentally friendly approach that reduces the expression of ripening and browning enzymes while increasing the activity of antioxidant enzymes; microorganisms are significantly inhibited, therefore improving the shelf life of fruits and vegetables. This review narrates the mechanism and principle involved in the use of cold plasma technique as a nonthermal agent and its application in impeding the activity of browning and ripening enzymes and increasing the expression of antioxidant enzymes for improving the shelf life and quality of fresh fruits and vegetables and preventing spoilage and pathogenic germs from growing. An overview of hurdles and sustainability advantages of cold plasma technology is presented.

show abstract

Section: Cold Plasma Techniquementioning

confidence: 99%

Recent developments in cold plasma‐based enzyme activity (browning, cell wall degradation, and antioxidant) in fruits and vegetables

Punia

Trif

Özoğul

et al. 2022

Comp Rev Food Sci Food Safe

View full text Add to dashboard Cite

show abstract

“…Apart from these, the two stages AC/DC/AC converter requires bulky filters at the inverter end for reducing THD from the inverter output voltage. The excessive use of magnetic core material like inductor filters raises some severe problems in the system [13][14][15]. Another important concern of a two-stage AC/AC converter is the DC-link capacitor [16].…”

Section: Introductionmentioning

confidence: 99%

A Direct Single-Phase to Three-Phase AC/AC Power Converter

et al. 2022

View full text Add to dashboard Cite

The traditional DC-link indirect AC/AC power converters (AC/DC/AC converters) employ two-stage power conversion, which increases the circuit complexity gate driving challenges, placing an excessive burden on the processor while implementing complex switching modulation techniques and leads to power conversion losses due to the use of a large amount of controlled power semiconductor switches. On the contrary, the traditional direct AC/AC voltage controllers, as well as frequency changers, suffer from high total harmonic distortion (THD) problems. In this paper, a new single-phase to three-phase AC/AC step-down power converter is proposed, which utilizes a multi-linking transformer and bilateral triode thyristors (TRIACs) as power semiconductor switches. The proposed direct AC/AC power converter employs single-stage power conversion, which mitigates the complexity of two-stage DC-link indirect AC/AC converters and traditional single-stage AC/AC frequency changers. Instead of using high-frequency pulse width modulated gate driving signals, line frequency gate pulses are used to trigger the TRIACs of the proposed AC/AC converter, which not only aids in reducing the power loss of the converter but also mitigates the cost and complexity of gate driver circuits. The proposed AC/AC converter reduces the THD of the output voltage significantly as compared to traditional direct AC/AC frequency changers. The performance of the proposed AC/AC converter is validated against RL and induction motor load in terms of overall THD and individual harmonic components through MATLAB/Simulink environment. A reduced-scale laboratory prototype is built and tested to evaluate the performance of the proposed AC/AC power converter. The experimental and simulation outcomes reveal the feasibility and excellent features of the proposed single-phase to three-phase AC/AC converter topology.

show abstract