This work will present an analysis of the functionality of power supplies producing laboratory controlled electrical discharges using pulsed variation of voltage. The analysis is done on simulated electrical parameters using PROTEUS ISIS software. Furthermore in this paper there will also be presented a simulation of plasma discharge used with power supplies in order to assesstheparameters in functionality of these power supplies.
Laboratory electrical discharges that produce non-thermal plasma are used more and more for microbiological decontamination, surface treatment and depollution by the means of decomposing some complex molecules or in the field of modern medicine. Each application requires a power supply particularly adapted to the plasma reactor type used. If the first applications of these discharges were designed mostly for reactor types with high volume discharge capabilities, and the power supplies were simple and robust generating high power using industrial frequencies, in time the reactors decreased significantly in size and the power supplies used were working on higher frequencies. This trend was adopted on one hand out of the need for energy optimization of the power supplies used, and on the other hand for obtaining a better homogeneity of the treatment. This paper aims to provide a comparison of few AC and pulsed power supplies, working at different frequencies, with respect to the electrical parameters, from the point of view of active species production. The measured electrical parameters of the electrical discharges are the power and the specific energy. Also the results obtained for treatment of distilled water using three types of plasma reactors (classic GlidArc, Mini-torch plasma and Gliding Spark) will be shown. The analysis focus on the modification of pH of the distilled water in time after the plasma treatment.
This paper aims to provide a comprehensive analysis of the output of DBD reactors considering 2 different power supplies that provide rectangular command voltage with variable duty cycle and frequency. The experiments presented were performed with these power supplies considering four geometries of DBD reactor. At this stage the input parameters of the power supplies are: frequency of control pulses, duty cycle and high voltage level applied on the DBD reactors by choosing a certain number of turns for the primary windings of the high voltage coil. The parameters considered as outputs from the reactor-power supply assembly were: the high voltage output and the electric current from the primary induction coil.
In this paper, theoretical and practical study of gliding arc discharges is presented considering the discharge itself. The characteristics of the gliding arc are studied at different flow rate values. For this study case instrumental air was used in order to elongate the spark thus obtaining the gliding arc. The comparison took into consideration linear approximations of the discharge compared to the real phenomena.
Considering the global socio-economic context, the pressure on natural resources and of course the effects that exploitation has on natural ecosystems and fauna is more and more evident. The use of renewable energy sources, together with improvements in energy efficiency, can help reduce energy consumption, reduce greenhouse gas emissions and, consequently, prevent dangerous climate change. The integration of renewable energy sources in urban areas and in everyday life is a viable solution. The present paper focuses on the presentation of small-scale wind systems integrated in urban areas and not only to capitalize any energy as efficiently as possible.
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