Pub Date : 2026-03-01Epub Date: 2026-01-27DOI: 10.1016/j.elstat.2026.104231
Hui Fu , Shaokang Meng , Xiaonan Luo , Qinzhen Zheng , Shuran Li , Zhen Liu , Keping Yan
A heat-exchange-assisted wire-tube electrostatic precipitator (HEAT-ESP) is proposed to mitigate wet plumes and improve PM2.5 capture in conventional ESPs. By cooling the collection electrode, the system enables simultaneous flue gas purification and heat recovery. Flue gas temperature and humidity significantly enhance discharge performance, increasing dust removal efficiency by up to 12.5 %, water recovery by 30.2 %, and heat transfer by 17.2 %. Particle concentration slightly reduces discharge current but improves overall performance, with gains of 10.0–16.5 % at 45 kV. The system exhibits strong synergy among dust removal, water recovery, and heat transfer. At the relative humidity of 90 % and a voltage of 22.5 kV, the maximum water harvesting efficiency and latent heat recovery-to-input ratio reach 772.78 kg/kWh and 489, respectively. With energy costing 0.1–0.3 CNY/kWh and water priced at 5–8 CNY/ton, this technology offers strong potential for energy and water conservation applications.
{"title":"Investigation on heat exchange assisted wet electrostatic precipitator in dust removal, heat transfer enhancement process and water collection","authors":"Hui Fu , Shaokang Meng , Xiaonan Luo , Qinzhen Zheng , Shuran Li , Zhen Liu , Keping Yan","doi":"10.1016/j.elstat.2026.104231","DOIUrl":"10.1016/j.elstat.2026.104231","url":null,"abstract":"<div><div>A heat-exchange-assisted wire-tube electrostatic precipitator (HEAT-ESP) is proposed to mitigate wet plumes and improve PM<sub>2.5</sub> capture in conventional ESPs. By cooling the collection electrode, the system enables simultaneous flue gas purification and heat recovery. Flue gas temperature and humidity significantly enhance discharge performance, increasing dust removal efficiency by up to 12.5 %, water recovery by 30.2 %, and heat transfer by 17.2 %. Particle concentration slightly reduces discharge current but improves overall performance, with gains of 10.0–16.5 % at 45 kV. The system exhibits strong synergy among dust removal, water recovery, and heat transfer. At the relative humidity of 90 % and a voltage of 22.5 kV, the maximum water harvesting efficiency and latent heat recovery-to-input ratio reach 772.78 kg/kWh and 489, respectively. With energy costing 0.1–0.3 CNY/kWh and water priced at 5–8 CNY/ton, this technology offers strong potential for energy and water conservation applications.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104231"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2026-01-28DOI: 10.1016/j.elstat.2026.104251
Abdulkerim Karabiber
This study investigates the effect of metal oxide fillers on the electrical, morphological, and output characteristics of rubber silicone-based triboelectric nanogenerators (TENGs). TENGs were fabricated using glass fiber as the common tribo-positive layer and silicone matrices doped with various metal oxides (Aluminum oxide, cobalt oxide, manganese oxide, molybdenum oxide, nickel oxide, and tungsten oxide) at 1, 2.5, and 5 wt% as tribo-negative layers. The devices were mechanically driven under controlled impact forces and frequencies, and their performance was evaluated under both ohmic and capacitive loads. Metal oxide doping generally increased internal resistance and decreased internal capacitance, leading to a cross-effect: enhanced output under ohmic loads due to suppressed leakage currents, but reduced performance under capacitive loads owing to diminished charge storage capacity. Among the fillers, cobalt oxide at 2.5 wt% yielded the highest voltage and maximum power output, whereas optimal compositions for other oxides were typically around 1 wt%. Excessive filler contents caused aggregation, air-gap formation, and loss of effective contact area, which degraded performance despite favorable changes in internal resistance and capacitance. Overall, the results demonstrate that metal oxide fillers offer an effective means to tune TENG performance, but optimal design requires simultaneous optimization of filler type and content, surface morphology, and load impedance.
{"title":"Energy harvesting performance of metal oxide doped TENGs based on load impedance characterization","authors":"Abdulkerim Karabiber","doi":"10.1016/j.elstat.2026.104251","DOIUrl":"10.1016/j.elstat.2026.104251","url":null,"abstract":"<div><div>This study investigates the effect of metal oxide fillers on the electrical, morphological, and output characteristics of rubber silicone-based triboelectric nanogenerators (TENGs). TENGs were fabricated using glass fiber as the common tribo-positive layer and silicone matrices doped with various metal oxides (Aluminum oxide, cobalt oxide, manganese oxide, molybdenum oxide, nickel oxide, and tungsten oxide) at 1, 2.5, and 5 wt% as tribo-negative layers. The devices were mechanically driven under controlled impact forces and frequencies, and their performance was evaluated under both ohmic and capacitive loads. Metal oxide doping generally increased internal resistance and decreased internal capacitance, leading to a cross-effect: enhanced output under ohmic loads due to suppressed leakage currents, but reduced performance under capacitive loads owing to diminished charge storage capacity. Among the fillers, cobalt oxide at 2.5 wt% yielded the highest voltage and maximum power output, whereas optimal compositions for other oxides were typically around 1 wt%. Excessive filler contents caused aggregation, air-gap formation, and loss of effective contact area, which degraded performance despite favorable changes in internal resistance and capacitance. Overall, the results demonstrate that metal oxide fillers offer an effective means to tune TENG performance, but optimal design requires simultaneous optimization of filler type and content, surface morphology, and load impedance.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104251"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2026-01-10DOI: 10.1016/j.elstat.2025.104230
Navraj S. Lalli, Andrea Giusti
Injecting fuel as a dispersion of charged droplets and applying electric fields has been proposed as a mechanism to improve the fuel flexibility of aviation engines. Modelling such systems requires computationally efficient methods that can predict when droplet instability occurs due to electrical forces overcoming surface tension. Therefore, two methods are developed to provide the maximum charge a droplet can hold before instability. Taylor’s approach of assuming prolate spheroidal droplet shapes up until instability is generalised to charged linear dielectric droplets in an insulating linear dielectric fluid and subject to a uniform electric field. Additionally, an analytical charge limit expression is derived by considering a spherical droplet and analysing the stresses acting at the point of maximum surface charge density. Both methods predict that the charge limit increasingly falls below the Rayleigh limit as the electric field intensity is increased, with the electric field effect increasing with increasing droplet diameter and permittivity. Taylor’s generalised method provides accurate electric field limits for uncharged dielectric droplets, while the analytical expression overestimates these limits. For conducting droplets in reasonably strong electric fields, the generalised method underestimates the charge limits by overestimating droplet elongation, while the analytical expression provides more accurate charge limits. The analytical expression is also expected to provide accurate charge limits when the droplet diameter, droplet permittivity, and/or electric field intensity are not large. Ultimately, the derived methods provide a computationally efficient approach for simulating the fragmentation of charged droplets in electric fields.
{"title":"Modelling the onset of instability for charged droplets in an external electric field","authors":"Navraj S. Lalli, Andrea Giusti","doi":"10.1016/j.elstat.2025.104230","DOIUrl":"10.1016/j.elstat.2025.104230","url":null,"abstract":"<div><div>Injecting fuel as a dispersion of charged droplets and applying electric fields has been proposed as a mechanism to improve the fuel flexibility of aviation engines. Modelling such systems requires computationally efficient methods that can predict when droplet instability occurs due to electrical forces overcoming surface tension. Therefore, two methods are developed to provide the maximum charge a droplet can hold before instability. Taylor’s approach of assuming prolate spheroidal droplet shapes up until instability is generalised to charged linear dielectric droplets in an insulating linear dielectric fluid and subject to a uniform electric field. Additionally, an analytical charge limit expression is derived by considering a spherical droplet and analysing the stresses acting at the point of maximum surface charge density. Both methods predict that the charge limit increasingly falls below the Rayleigh limit as the electric field intensity is increased, with the electric field effect increasing with increasing droplet diameter and permittivity. Taylor’s generalised method provides accurate electric field limits for uncharged dielectric droplets, while the analytical expression overestimates these limits. For conducting droplets in reasonably strong electric fields, the generalised method underestimates the charge limits by overestimating droplet elongation, while the analytical expression provides more accurate charge limits. The analytical expression is also expected to provide accurate charge limits when the droplet diameter, droplet permittivity, and/or electric field intensity are not large. Ultimately, the derived methods provide a computationally efficient approach for simulating the fragmentation of charged droplets in electric fields.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104230"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145941313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study explores energy-efficient methane decomposition for hydrogen production without CO2 emissions using warm plasma generated by an ignition coil. The ignition coil provided temporally stable discharges, allowing precise control of discharge energy through dwell time (DT) adjustment. Time-gated optical emission spectroscopy (0.4 nm resolution) measured vibrational and rotational temperatures, showing that vibrational temperature increased with DT while rotational temperature remained constant. Gas analysis revealed that hydrogen selectivity exceeded that of acetylene across a wide DT range, though it decreased with longer DT. Methane conversion reached a saturation trend, achieving the lowest specific energy consumption (SEC) of 8.8 kJ/NL under optimal conditions. Frequency variation experiments indicated an optimal 2–10 Hz range minimizing SEC and favoring carbon formation over acetylene. These results demonstrate controllable warm plasma generation via an ignition coil, revealing essential plasma characteristics required for effective hydrogen production.
{"title":"Energy-efficient methane decomposition via ignition coil-generated warm plasma for hydrogen production","authors":"Kazuya Kurokawa, Kazuhiro Akihama, Eiichi Takahashi","doi":"10.1016/j.elstat.2026.104252","DOIUrl":"10.1016/j.elstat.2026.104252","url":null,"abstract":"<div><div>This study explores energy-efficient methane decomposition for hydrogen production without CO<sub>2</sub> emissions using warm plasma generated by an ignition coil. The ignition coil provided temporally stable discharges, allowing precise control of discharge energy through dwell time (DT) adjustment. Time-gated optical emission spectroscopy (0.4 nm resolution) measured vibrational and rotational temperatures, showing that vibrational temperature increased with DT while rotational temperature remained constant. Gas analysis revealed that hydrogen selectivity exceeded that of acetylene across a wide DT range, though it decreased with longer DT. Methane conversion reached a saturation trend, achieving the lowest specific energy consumption (SEC) of 8.8 kJ/NL under optimal conditions. Frequency variation experiments indicated an optimal 2–10 Hz range minimizing SEC and favoring carbon formation over acetylene. These results demonstrate controllable warm plasma generation via an ignition coil, revealing essential plasma characteristics required for effective hydrogen production.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104252"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146189406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2026-02-09DOI: 10.1016/j.elstat.2026.104253
Claudia A.M. Schrama , Calvin Bavor , P. David Flammer , Charles G. Durfee
This paper presents an experimental investigation into the energy partitioning of quasi-static electrostatic discharge (ESD) events in air, a scenario in which the discharge occurs across a gap length that can be considered fixed. We systematically characterize the energy transferred to a series victim load across a broad range of resistances (0.1 to 10,000 ) and circuit parameters, including capacitance and gap length. Our results show that the fraction of stored energy delivered to the victim load is largely independent of gap length. We demonstrate that our extension of the classic Rompe-Weizel spark resistance model effectively predicts the scaling of this energy transfer, establishing a clear link between spark resistance and energy partitioning. These findings provide a predictive framework that should be valuable for guiding safety requirements for energetic materials and ignition scenarios and will inform the development of more accurate circuit models that can be applied to a wider range of ESD events such as those found in the electronics industry.
{"title":"Energy partitioning in electrostatic discharge with variable series load resistor","authors":"Claudia A.M. Schrama , Calvin Bavor , P. David Flammer , Charles G. Durfee","doi":"10.1016/j.elstat.2026.104253","DOIUrl":"10.1016/j.elstat.2026.104253","url":null,"abstract":"<div><div>This paper presents an experimental investigation into the energy partitioning of quasi-static electrostatic discharge (ESD) events in air, a scenario in which the discharge occurs across a gap length that can be considered fixed. We systematically characterize the energy transferred to a series victim load across a broad range of resistances (0.1 to 10,000 <span><math><mi>Ω</mi></math></span>) and circuit parameters, including capacitance and gap length. Our results show that the fraction of stored energy delivered to the victim load is largely independent of gap length. We demonstrate that our extension of the classic Rompe-Weizel spark resistance model effectively predicts the scaling of this energy transfer, establishing a clear link between spark resistance and energy partitioning. These findings provide a predictive framework that should be valuable for guiding safety requirements for energetic materials and ignition scenarios and will inform the development of more accurate circuit models that can be applied to a wider range of ESD events such as those found in the electronics industry.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104253"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146189526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2026-02-26DOI: 10.1016/j.elstat.2026.104272
Mihail N. Popescu , Alvaro Domínguez , William E. Uspal , Szilveszter Gáspár
Patches of catalyst imprinted on supporting walls induce motion of the fluid around them once they are supplied with the chemical species (“fuel”) that are converted by the catalytic chemical reaction. In many cases (e.g., enzymes catalyzing the breakup of molecular substrates), pairs of oppositely charged ionic species are released in the surrounding solution as a result of the reaction at the patch. By using a simple model of activity for an ion-pairs releasing patch imprinted on a planar wall in contact with an electrolyte solution, we determine analytically the self-induced chemical composition inhomogeneities and electric field in the solution, as well as the resulting Stokes flow, in a half space geometry. The results provide the necessary tools for interpreting the motion of point-like tracer particles, which is the observable typically studied in experimental investigations.
{"title":"Self-induced electrostatic field and hydrodynamic flow in an electrolyte solution in contact with an ion-pairs releasing active patch on a planar wall","authors":"Mihail N. Popescu , Alvaro Domínguez , William E. Uspal , Szilveszter Gáspár","doi":"10.1016/j.elstat.2026.104272","DOIUrl":"10.1016/j.elstat.2026.104272","url":null,"abstract":"<div><div>Patches of catalyst imprinted on supporting walls induce motion of the fluid around them once they are supplied with the chemical species (“fuel”) that are converted by the catalytic chemical reaction. In many cases (e.g., enzymes catalyzing the breakup of molecular substrates), pairs of oppositely charged ionic species are released in the surrounding solution as a result of the reaction at the patch. By using a simple model of activity for an ion-pairs releasing patch imprinted on a planar wall in contact with an electrolyte solution, we determine analytically the self-induced chemical composition inhomogeneities and electric field in the solution, as well as the resulting Stokes flow, in a half space geometry. The results provide the necessary tools for interpreting the motion of point-like tracer particles, which is the observable typically studied in experimental investigations.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104272"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147398202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2026-03-03DOI: 10.1016/j.elstat.2026.104263
I.F. Spivak-Lavrov, S.U. Sharipov, T. Zh Shugayeva, A.B. Seiten
Accurate modeling of electrostatic deflector systems is necessary to improve the resolution of particle-optical devices such as electron beam lithography systems and ultrafast electron microscopes. Traditional models often neglect the fringing fields at the boundaries of the deflector plates, despite their critical influence on the transverse and longitudinal velocities of charged particles and, consequently, on their actual trajectories. This paper presents a comprehensive analytical study of the electrostatic field and capacitance of deflector plates equipped with parallel at the input and expanding grounded screens at the output. Such a configuration enables enhanced beam control while mitigating uncontrolled stray fields.
Using methods from the theory of functions of complex variables, we derive exact expressions for the potential distribution in the system. These solutions allow one to calculate the spatially varying electrostatic field strength in the deflector and determine the capacitance of deflector plates of various configurations. The approach can be used even for very short deflector plates.
The results confirm that expanding grounded screens significantly localize the fringing field as well as the effects of uncontrolled stray fields.
This analytical model provides a robust basis for optimizing the control of charged particle beams and can be used in the design of modern experimental applications of electron and ion optics.
{"title":"Analytical modeling of electrostatic fields and capacitance in deflector plates with expanding grounded screens","authors":"I.F. Spivak-Lavrov, S.U. Sharipov, T. Zh Shugayeva, A.B. Seiten","doi":"10.1016/j.elstat.2026.104263","DOIUrl":"10.1016/j.elstat.2026.104263","url":null,"abstract":"<div><div>Accurate modeling of electrostatic deflector systems is necessary to improve the resolution of particle-optical devices such as electron beam lithography systems and ultrafast electron microscopes. Traditional models often neglect the fringing fields at the boundaries of the deflector plates, despite their critical influence on the transverse and longitudinal velocities of charged particles and, consequently, on their actual trajectories. This paper presents a comprehensive analytical study of the electrostatic field and capacitance of deflector plates equipped with parallel at the input and expanding grounded screens at the output. Such a configuration enables enhanced beam control while mitigating uncontrolled stray fields.</div><div>Using methods from the theory of functions of complex variables, we derive exact expressions for the potential distribution in the system. These solutions allow one to calculate the spatially varying electrostatic field strength in the deflector and determine the capacitance of deflector plates of various configurations. The approach can be used even for very short deflector plates.</div><div>The results confirm that expanding grounded screens significantly localize the fringing field as well as the effects of uncontrolled stray fields.</div><div>This analytical model provides a robust basis for optimizing the control of charged particle beams and can be used in the design of modern experimental applications of electron and ion optics.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104263"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147398153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2026-02-21DOI: 10.1016/j.elstat.2026.104271
Orion Ciftja
We present a closed-form analytical expression for the electrostatic interaction energy between two non-coaxial, parallel, uniformly charged disks of arbitrary radii, separation, and lateral offset. While the interaction of coaxial disks has been studied previously, the more general non-coaxial configuration has remained largely intractable and typically requires numerical evaluation. By employing a Fourier-Bessel expansion of the Coulomb kernel, the original four-dimensional surface integral is reduced to a single integral over Bessel functions, yielding a compact and computationally efficient representation. The derived expression reproduces known results in the coaxial limit and accurately captures the dependence of interaction energy on lateral offset and disk separation. Numerical validation confirms the precision of the formula. This work provides both theoretical insight into how lateral misalignment affects electrostatic interactions and a practical tool for rapid evaluation in micro- and nanoscale devices, layered nanostructures, and capacitive systems.
{"title":"Electrostatic energy of two identical non-coaxial uniformly charged disks lying in parallel planes","authors":"Orion Ciftja","doi":"10.1016/j.elstat.2026.104271","DOIUrl":"10.1016/j.elstat.2026.104271","url":null,"abstract":"<div><div>We present a closed-form analytical expression for the electrostatic interaction energy between two non-coaxial, parallel, uniformly charged disks of arbitrary radii, separation, and lateral offset. While the interaction of coaxial disks has been studied previously, the more general non-coaxial configuration has remained largely intractable and typically requires numerical evaluation. By employing a Fourier-Bessel expansion of the Coulomb kernel, the original four-dimensional surface integral is reduced to a single integral over Bessel functions, yielding a compact and computationally efficient representation. The derived expression reproduces known results in the coaxial limit and accurately captures the dependence of interaction energy on lateral offset and disk separation. Numerical validation confirms the precision of the formula. This work provides both theoretical insight into how lateral misalignment affects electrostatic interactions and a practical tool for rapid evaluation in micro- and nanoscale devices, layered nanostructures, and capacitive systems.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104271"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147398198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2026-02-05DOI: 10.1016/j.elstat.2026.104262
K. Yanallah , M.R. Bouazza , A. Tilmatine , F. Pontiga , A. Zouaghi , N. Kadous , Y. Bellebna
This study explores innovative solutions to reduce efficiency losses in solar panels caused by dust accumulation, using corona discharge as a mitigation method. Ions produced by the positive or negative corona discharge transfer momentum to neutral air molecules through collisions, resulting in an airflow (ionic wind) that can help to eliminate dust accumulation. The cleaning system whose operation is numerically modeled consists of a corona blower device that moves along the panel, conveying the dust in a linear direction and providing a non-contact cleaning method. Dust particles are affected by different forces, such as Coulomb force, gravitational force, aerodynamic drag force, and van der Waals adhesion. Poisson's equation, the continuity equation for charged particles and the Navier-Stokes equations are solved to evaluate the Coulomb and drag force. Emphasis is placed on understanding how forces affect particle trajectories, and which forces are most relevant to the operation of the cleaning system.
{"title":"Numerical modeling of dust particle motion in a corona discharge-based ionic wind cleaning system for solar panels","authors":"K. Yanallah , M.R. Bouazza , A. Tilmatine , F. Pontiga , A. Zouaghi , N. Kadous , Y. Bellebna","doi":"10.1016/j.elstat.2026.104262","DOIUrl":"10.1016/j.elstat.2026.104262","url":null,"abstract":"<div><div>This study explores innovative solutions to reduce efficiency losses in solar panels caused by dust accumulation, using corona discharge as a mitigation method. Ions produced by the positive or negative corona discharge transfer momentum to neutral air molecules through collisions, resulting in an airflow (ionic wind) that can help to eliminate dust accumulation. The cleaning system whose operation is numerically modeled consists of a corona blower device that moves along the panel, conveying the dust in a linear direction and providing a non-contact cleaning method. Dust particles are affected by different forces, such as Coulomb force, gravitational force, aerodynamic drag force, and van der Waals adhesion. Poisson's equation, the continuity equation for charged particles and the Navier-Stokes equations are solved to evaluate the Coulomb and drag force. Emphasis is placed on understanding how forces affect particle trajectories, and which forces are most relevant to the operation of the cleaning system.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104262"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146189402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2026-01-16DOI: 10.1016/j.elstat.2026.104242
Swe Zin Linn Htet, Takuya Kondo, Takuma Miyake, May Thin Khaing, Tatsuya Sakoda
Partial discharge (PD) is a precursor to insulation breakdown in cast resin transformers. This study investigates PD behavior in epoxy resin containing insulation paper which is commonly used in cast resin transformers to enhance dielectric strength. If there are voids between epoxy and insulation paper, PDs may occur. Measuring PDs in this configuration helps reproduce actual PD phenomena such as PD magnitude, PD occurrence frequency, and degradation in cast resin transformers. In order to grasp the PD behavior, we fabricated a plane-to-plane epoxy electrode and a wire-wound epoxy electrode. Each epoxy electrode contained a void and insulation paper and was arranged in a cubicle. PDs were detected using two transient earth voltage (TEV) sensors and a current transformer (CT) sensor. TEV sensors on the inner cubicle wall captured higher frequency components than those on the outer wall. Additionally, higher frequency components more than 100 MHz became larger after PDs made pits or electrical trees, which is useful for evaluating state of development of PD activities.
{"title":"Partial discharge behavior in epoxy resin including insulation paper","authors":"Swe Zin Linn Htet, Takuya Kondo, Takuma Miyake, May Thin Khaing, Tatsuya Sakoda","doi":"10.1016/j.elstat.2026.104242","DOIUrl":"10.1016/j.elstat.2026.104242","url":null,"abstract":"<div><div>Partial discharge (PD) is a precursor to insulation breakdown in cast resin transformers. This study investigates PD behavior in epoxy resin containing insulation paper which is commonly used in cast resin transformers to enhance dielectric strength. If there are voids between epoxy and insulation paper, PDs may occur. Measuring PDs in this configuration helps reproduce actual PD phenomena such as PD magnitude, PD occurrence frequency, and degradation in cast resin transformers. In order to grasp the PD behavior, we fabricated a plane-to-plane epoxy electrode and a wire-wound epoxy electrode. Each epoxy electrode contained a void and insulation paper and was arranged in a cubicle. PDs were detected using two transient earth voltage (TEV) sensors and a current transformer (CT) sensor. TEV sensors on the inner cubicle wall captured higher frequency components than those on the outer wall. Additionally, higher frequency components more than 100 MHz became larger after PDs made pits or electrical trees, which is useful for evaluating state of development of PD activities.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104242"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145980856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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