Analysis of Optical Radiation Spectra Emitted by Electrical Discharges, Generated by Different Configuration Types of High Voltage Electrodes

2018 ◽  
Author(s):  
Michal Koziol ◽  
Lukasz Nagi
Keyword(s):  
High Voltage ◽  
Optical Radiation ◽  
Electrical Discharges ◽  
Radiation Spectra

scholarly journals Energy Distribution of Optical Radiation Emitted by Electrical Discharges in Insulating Liquids

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2172 ◽  
Author(s):  
Michał Kozioł
Keyword(s):  
Energy Distribution ◽  
Optical Radiation ◽  
Electric Discharges ◽  
Diagnostic Systems ◽  
Electrical Discharges ◽  
Insulating Liquids ◽  
Protection Systems ◽  
Surface Discharges ◽  
Optical Spectrophotometry ◽  
Natural Ester

This article presents the results of the analysis of energy distribution of optical radiation emitted by electrical discharges in insulating liquids, such as synthetic ester, natural ester, and mineral oil. The measurements of optical radiation were carried out on a system of needle–needle type electrodes and on a system for surface discharges, which were immersed in brand new insulating liquids. Optical radiation was recorded using optical spectrophotometry method. On the basis of the obtained results, potential possibilities of using the analysis of the energy distribution of optical radiation as an additional descriptor for the recognition of individual sources of electric discharges were indicated. The results can also be used in the design of various types of detectors, as well as high-voltage diagnostic systems and arc protection systems.

Testing High-Voltage Electrical Discharges in Disintegrating Claystone for Isotopic and Mineralogical Studies: an Example Using Opalinus Claystone

2017 ◽  
Vol 65 (5) ◽  
pp. 342-354 ◽  
Author(s):  
Horst Zwingmann ◽  
Alfons Berger ◽  
Urs Eggenberger ◽  
Andrew Todd ◽  
Marco Herwegh
Keyword(s):  
High Voltage ◽  
Electrical Discharges

scholarly journals Green extraction of polyphenols from grapefruit peels using high voltage electrical discharges, deep eutectic solvents and aqueous glycerol

2019 ◽  
Vol 295 ◽  
pp. 165-171 ◽  
Author(s):  
Sally El Kantar ◽  
Hiba N. Rajha ◽  
Nadia Boussetta ◽  
Eugène Vorobiev ◽  
Richard G. Maroun ◽  
...  
Keyword(s):  
High Voltage ◽  
Deep Eutectic Solvents ◽  
Electrical Discharges ◽  
Green Extraction

Effect of high voltage electrical discharges on filtration properties of Saccharomyces cerevisiae yeast suspensions

2010 ◽  
Vol 346 (2) ◽  
pp. 288-295 ◽  
Author(s):  
M. Loginov ◽  
N. Lebovka ◽  
O. Larue ◽  
M. Shynkaryk ◽  
M. Nonus ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
High Voltage ◽  
Electrical Discharges ◽  
Filtration Properties

scholarly journals Phenolic and Antioxidant Analysis of Olive Leaves Extracts (Olea europaea L.) Obtained by High Voltage Electrical Discharges (HVED)

Foods ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 248 ◽  
Author(s):  
Irena Žuntar ◽  
Predrag Putnik ◽  
Danijela Bursać Kovačević ◽  
Marinela Nutrizio ◽  
Filip Šupljika ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
High Voltage ◽  
Near Infrared ◽  
Green Technology ◽  
Total Phenolic ◽  
Green Solvents ◽  
Electrical Discharges ◽  
Olive Leaves ◽  
Significant Difference

Background: The aim of this study was to evaluate high voltage electrical discharges (HVED) as a green technology, in order to establish the effectiveness of phenolic extraction from olive leaves against conventional extraction (CE). HVED parameters included different green solvents (water, ethanol), treatment times (3 and 9 min), gases (nitrogen, argon), and voltages (15, 20, 25 kV). Methods: Phenolic compounds were characterized by ultra-performance liquid chromatography-tandem mass spectrometer (UPLC-MS/MS), while antioxidant potency (total phenolic content and antioxidant capacity) were monitored spectrophotometrically. Data for Near infrared spectroscopy (NIR) spectroscopy, colorimetry, zeta potential, particle size, and conductivity were also reported. Results: The highest yield of phenolic compounds was obtained for the sample treated with argon/9 min/20 kV/50% (3.2 times higher as compared to CE). Obtained results suggested the usage of HVED technology in simultaneous extraction and nanoformulation, and production of stable emulsion systems. Antioxidant capacity (AOC) of obtained extracts showed no significant difference upon the HVED treatment. Conclusions: Ethanol with HVED destroys the linkage between phenolic compounds and components of the plant material to which they are bound. All extracts were compliant with legal requirements regarding content of contaminants, pesticide residues and toxic metals. In conclusion, HVED presents an excellent potential for phenolic compounds extraction for further use in functional food manufacturing.

scholarly journals About diagnostics of Z-pinches hot points

2000 ◽  
Vol 18 (2) ◽  
pp. 291-296 ◽  
Author(s):  
V.Yu. POLITOV ◽  
A.V. POTAPOV ◽  
L.V. ANTONOVA
Keyword(s):  
Experimental Data ◽  
Theoretical Analysis ◽  
Spectral Resolution ◽  
High Spectral Resolution ◽  
Electrical Discharges ◽  
Maximum Compression ◽  
X Ray ◽  
Average Temperature ◽  
Radiation Spectra ◽  
Spectral Intensities

We present the results of X-ray diagnostics of Z-pinch hot points, formed during fast electrical discharges through exploding Al wires. Experimental data include the pinhole images and X-ray time integrated radiation spectra. These spectra were obtained with high spectral resolution in the range 1.5–2.2 keV, contained the most intensive resonance lines of Al H- and He-like ions. Comparison of the recorded lines width and peak intensities with the corresponding modeled values, enables us to estimate the main hydrodynamical parameters of hot point, such as average temperature and density, being achieved at a moment of its maximum compression. Additionally, on the base of theoretical analysis of the spectral intensities distribution in well-resolved Lyα satellites, the gradient of compression velocities field is concluded. Some features of the investigated lines spectra forming are discussed.

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