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This study aims to evaluate the mitigation method of environmental impact of power-plant discharges by reducing the temperature difference between effluent and coastal water. To minimize excessive thermal pollution which could cause serious socio-economic problems, Ocean Thermal Energy Conversion (OTEC) system can be applied to control the resultant temperature of combined discharge as well as to...
Discharges in humid air are valuable tools for producing active species which react both at the liquid surface of the targets and in the solution. These species are responsible for a noticeable abatement of the pollutant concentration, even of recalcitrant compounds. The relevant kinetics are examined with special emphasis on Temporal Post Discharges Reactions which develop in the solution after the...
The paper refers to the optimal operation of GlidArc type cold plasma plane-symmetrical electrochemical reactors with auxiliary electrodes and proposes the correct definition for the position of the auxiliary electrodes when designing the device. This proposes considering the capacities that characterize the ignition and distribution of the pilot electrical discharge between the E1 - A1 - A2 - E2...
In order to improve collecting efficiency of wet electsostatic precipitation a new polar matching system is presented. Based on Gauss Theorem and image charge method the mathematical model is established for calculating electric field intensity distribution of the new polar matching system. The results show that the electric field intensity gets homogeneous at the polar plate when polar space is at...
The decomposition of the azo dye methyl red in aqueous solution was performed using a pulsed dielectric barrier discharge reactor (DBD) in coaxial configuration. The solution was made to flow as a thin layer on the surface of the inner electrode of the DBD reactor and the discharge was generated at the gas-liquid interface. In this way the oxidizing species formed in the discharge can easily penetrate...
In order to research spark discharge, including the energy, electromagnetic radiation characteristics and its influence on surroundings, a spark discharge experiment was set up, voltage waveforms were recorded by an oscillograph and discharge energy was calculated when discharging. Physical models were founded using FEKO and different electromagnetic radiation patterns were simulated under a range...
A continuous-wave microwave radiation source is under investigation using Micro-Hollow Cathode Discharge (MHCD) technology. Arrays of grooves, 50 microns in diameter and ~3 mm long have been fabricated to contain the plasma discharge. Argon discharge in the resonance cavity has been observed at atmospheric pressure. The turn-on voltage was observed to be 400V (383μA). Lowering the voltage to 310V...
Electrical discharges; especially electrical discharges in air are still one of the most unexplored fields of the physics. Lately, there are numerical models of electrical discharges appearing, special group of which are simulations. It appeared that the finite element method (FEM) is not a good choice for simulations to base on. Instead of FEM charge simulation method (CSM) has been used in work...
This study deals with the use of the Dielectric Barrier Discharge (DBD) actuators with various geometrical and electrical properties to obtain the optimum operating conditions that govern the performance of the surface DBD actuator. Experiments were carried out to investigate the required threshold voltage and the discharge power which aimed to study the relationship between the DBD plasma actuator...
Non-thermal plasmas generated by electrical discharges burning in natural air at atmospheric pressure involve gaseous active species which present particular chemical properties and may thus be later used for various environmental applications. This paper is devoted to identifying the relevant species and their specific chemical properties. The main species able to react at the surface of an aqueous...
This paper studies one of the methods to diminish the electromagnetic perturbations which appear on the function in steady state conditions around the cold plasma electrochemical reactors GLIDARC type with two electrodes. To know the value of electromagnetic perturbations is a very important factor because the perturbations may influence the personal safety of the persons that work with these types...
Dielectric barrier discharge (DBD) air plasma is considered as a potential method for surface sterilization recently. It is a source of abundant active species, ions and charged particles. The possible induction of mutation in Candida shehatae by DBD air plasma at atmospheric pressure was verified in this study. Following the exposure of C. shehatae to DBD air plasma, two mutants (designated as C81020...
Techniques of artificially-triggered lightning have provided a significantly useful means to directly measure various physical parameters of lightning discharge and to conduct research on protection methods of lightning electromagnetic pulses. In this study, we measured and analyzed the induced overvoltage on the overhead transmission line and the overcurrent through Surge Protective Devices (SPD)...
Breakdown voltage (VBD) is the most fundamental parameter to detect different gases in ionization gas sensor. In this work we present the simulated VBD in DC discharges and combined DC and RF discharges in argon using Particle-in-Cell Monte Carlo Collision (PIC-MCC) method. Electron density which plays a crucial role in the breakdown mechanism is also calculated at different positions between the...
In this study, we measure the discharge current and their radiation noise of ESD from charged metal to investigate the effect of the shapes of the metal electrodes. The ESD in this study is approaching and gaseous discharge with gap control. The radius of curvature of the high voltage (± 6 kV) electrode is 10 types vary from 0.18 mm to 15 mm. From experimental results, it is found that the radius...
In this paper, a mathematical model was proposed to describe the behavior of OH and O radicals in the Dielectric Barrier Discharge (DBD) of NO/SO2/O2/H2O/N2 system with a cylindrical reactor, which energized by repetitive high voltage pulses at normal atmospheric pressure and room temperature. The generation and consumption of the radials were considered in the mathematical model by a single pulse...
Inverter power of series resonant type are commonly used in dielectric barrier discharge, By means of theoretical analysis and experiments based on Q-V Lissajous figures, study on optimal matching of DBD load and inverter power are carried out to improve the working performance and efficiency of DBD device. The result indicate that: as the DBD equipment's discharge power enhanced, the dielectric equivalent...
Objective to investigate the dependence of nitrogen oxide removal effect on a plasma reactor length, three groups of different length experiments were conducted using a concentric cylinder double dielectric-barrier discharge reactor. Experimental results show that changing the length does not obviously affect the electrical power consumption with a given level of nitrogen oxide removal efficiency...
In order to study resonance problem and harmonic analysis of dielectric barrier discharge (DBD), a high voltage and frequency alternating current (AC) power supply and the distributed parameter circuit model which consists of high frequency high voltage transformer and DBD load, are analyzed. Based the Fourier forms of the voltage and current, the current harmonic and the phenomenon of resonant state...
Three groups of different initial NO concentration experiments were conducted using a concentric cylinder double dielectric-barrier discharge reactor to investigate how variational initial NO concentrations affect the effectiveness of dielectric barrier discharge (DBD) treatment flue gas pollutants. Results show that the input energy density increases with increasing the initial NO concentration under...
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