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This paper addresses the problematic of usage of electronic ballasts in modern LED lighting equipment. A sample of eleven LED lamps available on the market is analyzed in temporal and frequency based analysis. The topology of the ballasts is determined and modeled using Spice software in a simplified manner. Results of the simulations are verified. Pairs of the lamp models are simulated and compared...
As the cruising range is one of the main disadvantages of fully electric vehicles compared to vehicles with combustion engines, its improvement is an important research challenge momentarily. The recuperation of the braking energy is one research approach. In this paper, the theoretical potential of recuperation is discussed and a survey of recuperation strategies is presented. The recuperation energy...
Industrial microgrids functioning under islanded mode of operation are often subjected to large and fluctuating demands from loads like crushers, excavators, and steel rolling mills. This paper studies the supercapacitor cycle life when multiple small-rated but distantly located distributed energy resources (DERs) are supplying a cement plant crusher-conveyor load. Each DER consisted of a fuel cell...
Air pollutants generated by ships in both gaseous and particulate forms, have a long term effect on the quality of the environment and cause a significant exposure risk to people living in proximities of harbors or in neighboring coastal areas. It was recently estimated, that ships produce at least 15% of the world's NOx (more than all of the world's cars, buses and trucks combined), between 2.5–4%...
We have been investigating a technology for decomposing adsorbed volatile organic compounds (VOCs) using a nonthermal plasma flow, which is easily generated at low cost with a compact apparatus. In this study, we investigated the effect of water spray on the decomposition of adsorbed toluene that is achieved using nonthermal plasma flow. Spraying water upstream of the adsorbent should increase the...
A transition to hydrogen as a major fuel could transform the US as well as global energy system increasing energy security while reducing environmental impact. This major transformation of our energy system would require a sustainable production of hydrogen using renewable resources. Hydrogen production using photo-electrochemical water splitting has been considered as a “holy grail” of sustainable...
In order to investigate whether the triboriboelectrification of ice is affected by an anisotropic hardness at the surface of specimens or not, the author investigated to the triboelectrification using two kinds of specimens, one is hardened specimen, the other is raw specimen. On rubbing with speed 3.4 cm/s, the hardened specimen is always positively charged as against the raw specimen regardless...
Plastic packaging materials are produced on roll-to-roll coating, printing and converting machines that convey insulating, polymer webs at speeds often exceeding 3 m/s. Static charges on these web cause a number of problems including sparks that ignite fires, that shock people, and that cause logic errors in the production machine control systems. Static charges attract airborne contaminates and,...
Concentrating Solar Power (CSP) systems based on parabolic trough and power tower technologies provide inherent advantage of energy storage and high efficiency for utility-scale solar plants. The specular reflectance efficiency of the solar mirrors plays a critical role in the efficiency of electric power generation. The deposition of atmospheric dust on the surface of the mirrors reduces its reflectance...
A DC ionizer specifically designed for a moving charged target is proposed. The ionizer, which is proximally positioned to the charged target, is composed of a grounded mesh electrode and an array of positive and negative needle electrodes. The positive and negative needles face each other to make a high space charge density of positive and negative ions just above the grounded mesh. The electric...
In this paper, a numerical algorithm has been formulated for calculating the charge magnitude on a spherical droplet created by break-up of a cylindrical ligament in an external electric field. The algorithm is based on the Finite Element Method and it determines the droplet charge as a function of the droplet radius and ligament length. It has been found that the droplet charge is a function of particle...
This paper presents a literature review on magnetically-controlled devices, variable inductors and variable transformers, and their applications in lighting gear. It describes the fundamentals and basic operating principle of such devices. Then, it focus on the review of specific techniques and circuits taking advantage of the presence of a controlled inductance value, by covering recent applications...
In this paper, a program-start fluorescent ballast is proposed. The proposed program start ballast has a resonant filament heating circuit with clamped Q. The proposed resonant filament heating circuit gives the ballast strong filament preheat capability, desensitizes the preheat voltage variation within a reasonable range of preheat frequency and cuts the filament heating back in full bright. Moreover,...
Proposed are new applications of image displays to invisible optoelectronic watermarking systems whose technique will be effective in business and industry. The system is basically characterized by paired installer and viewer of new kind to transfer hidden invisible auxiliary data on watermark code patterns. A flat-panel image display enabled us to demonstrate invisible data hidden behind the watermark...
Tribo-electrostatic separation of mm-size granular plastics mixtures is widely used in recycling industry. However, electrostatic separation of micronized plastics is still inefficient since the adhesion and aerodynamic forces surpass the electric force. The aim of this paper is to optimize a new separation process for mixed fine granular plastics based on a fluidized bed tribocharging system. A pair...
An induction heating appliance designed to uniformly heat up metallic plates is studied in this work. It consists of one planar inductor with two concentric coils attached to a mechanism, which allows moving the inductor under the plate while heating. This system is a possible solution for the growing concept of flexible induction cooking hobs, improving their performance in flexibility and in thermal...
An electrostatic diesel particulate matter filtration device has been tested using 4000 cc-diesel engines operating at standard (European Stationary Cycle (ESC) 13 and European Transient Cycle (ETC)) conditions when temperature changed from 100 to 500oC and gas velocity up to 30 m/s. The device consisted of an electrostatic precipitator(ESP) with edge to cylinder type and a metallic foam filter. To...
This paper describes a new method for the on-line parameter estimation of an induction heating system. Simulations and experiments are presented in order to measure its impedance matrix for more exact control in closed loop. In previous papers, various parameter identification methods including off-line methods were introduced and compared for current inverters. It has been demonstrated that parameter...
This steel maker is upgrading the Electric Arc Furnace (EAF) Melt Shop to increase production and improve metallurgical quality of their product. The increased electrical load and harmonic generation for the new furnace operation necessitated the installation of a static var compensator (SVC) to meet utility interconnect requirements. This paper describes a sequence of comprehensive analysis performed...
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