Resource-Efficient Technologies
http://reffit.tech/index.php/res-eff
<p><em>Resource-Efficient Technologies</em> is an international journal that publishes research and review articles, short communications, commentaries, and book reviews in the ever broadening field of sustainable and resource-efficient technologies, which reduce energy and materials consumption, reduce or completely eliminate toxic waste, develop closed-loop recycling technologies with the purpose of sustainable, economically efficient and socially responsible use of all natural resources and man-made product</p>Tomsk Polytechnic Universityen-USResource-Efficient Technologies2405-6537DYNAMIC BEHAVIOR PREDICTION OF LITHIUM POLYMER BATTERY FOR LOW-POWER SOLAR PV APPLICATIONS
http://reffit.tech/index.php/res-eff/article/view/213
<p>With an increase in the amount of renewable, solar photovoltaic in particular, developing efficient energy storage media will become increasingly important. Batteries are one of the most common storage devices, and the maximum runtime and dynamic behavior of batteries play an important role in various energy storage applications. Therefore, it is crucial to understand the battery behavior during charging and discharging operation. This study aims to analyze the properties of a lithium polymer battery to support low-power Solar PV applications through experiment and simulation with a goal of understanding its electrical behavior. A simple experimental test procedure was used to determine the various electric parameters required to develop a model of the battery. Simulations results at various C rates captured the dynamic behavior of the lithium polymer battery, revealing an acceptable trade-off between accuracy and complexity.</p>Amit Kumar RohiSaroj Rangnekar
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http://creativecommons.org/licenses/by-nc/4.0
2018-12-052018-12-05411310.18799/24056537/2018/4/213PECULIARITIES OF ELECTROMAGNETIC OSCILLATIONS GENERATED BY A CHARGED PARTICLE CROSSING THE PLANAR BOUNDARY BETWEEN A CONDUCTING MEDIUM AND A VACUUM
http://reffit.tech/index.php/res-eff/article/view/215
<p>The peculiarities of electromagnetic oscillations generated by a charged particle moving rectilinearly and uniformly have been studied when the particle crosses a planar boundary between a conducting medium and a vacuum perpendicular to that boundary. This study is based on the relevant exact analytical solutions of Maxwell equations, and the generalized Drude–Lorentz–Sommerfeld formula has been used for the dielectric function of conducting medium in the numerical calculations. The results of our investigation indicated that a charged particle may generate large amplitude oscillations in an electric field at frequencies wherein the dispersion phenomenon is essential and the real part of the conducting material’s dielectric function is negative. The results further revealed that these oscillations are localized at the planar boundary of the conducting medium and a vacuum. The possibility of using this phenomenon to generate electromagnetic radiation at large distances from the surface of a conducting medium of finite size is also discussed.</p>Levon Shavigh GrigoryanArtak Henrik MkrtchyanHrant Frunzik KhachatryanMher Levon GrigoryanAnush Vahagn SargsyanPetros Hovhannes Mosoyan
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http://creativecommons.org/licenses/by-nc/4.0
2018-12-212018-12-214141810.18799/24056537/2018/4/215SUPERLUMINAL SYNCHROTRON RADIATION
http://reffit.tech/index.php/res-eff/article/view/216
<p>To avoid complex computations based on wide Fourier expansions, the electromagnetic field of synchrotron radiation (SR) was analyzed using Lienard–Wiechert potentials in this work. The retardation equation was solved for ultrarelativistic movement of rotating charge at distances up to the trajectory radius. The radiation field was determined to be constricted into a narrow extended region with transverse sizes approximately the radius of trajectory divided by the particle Lorentz factor (characteristic SR length) cubed in the plane of trajectory and the distance between the observation and radiation emission point divided by the Lorentz factor in the vertical direction. The Lienard–Wiechert field of rotating charge was visualized using a parametric form to derive electric force lines rather than solving a retardation equation. The electromagnetic field of a charging point rotating at superluminal speeds was also investigated. This field, dubbed a superluminal synchrotron radiation (SSR) field by analogy with the case of a circulating relativistic charge, was also presented using a system of electric force lines. It is shown that SSR can arise in accelerators from “spot” of SR runs faster than light by outer wall of circular accelerator vacuum chamber. Furthermore, the mentioned characteristic lengths of SR in orbit plane and in vertical direction are less than the interparticle distances in real bunches in ultrarelativistic accelerators. It is indicating that this phenomenon should be taken into account when calculating bunch fields and involved at least into the beam dynamic consideration.</p>M.A. AginianS.G. ArutunianE.G. LazarevaA.V. Margaryan
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http://creativecommons.org/licenses/by-nc/4.0
2018-12-262018-12-264192510.18799/24056537/2018/4/216