The system of trigeneration with binary cycle for use as an energy source for gas fuel

Abramovich, Boris N.; Bogdanov, Ivan; Kopteva, Alexandra V.; Malarev, V. I.

doi:10.1088/1757-899x/643/1/012092

Cited by 10 publications

(2 citation statements)

References 8 publications

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“…Внедрение предложенного метода допустимо в элементах подсистем видеонаблюдения, входящих в состав интеллектуальной транспортной системы [33][34][35][36][37][38][39], систем видеонаблюдения судопропуска [40][41], с учетом совершенствования смежных аспектов [42][43][44], а также в видеосистемах безопасности современных энергетических комплексов [45,46].…”

Section: заключениеunclassified

The main regularities of hydrodynamic effect caused by natural marine conditions on the underwater objects

Гурьев¹,

Слуцкая²

2020

MORSKIE INTELLEKTUAL`NYE TEHNOLOGII)

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Обеспечение управляемости морских объектов серьезно усложняется при их движении в сложных условиях морского волнения, ветра и других. Для подводных объектов важным фактором, влияющим на их движение, является существенная пространственно-временная неоднородность натурных гидрофизических полей плотности и скорости, а также внутренние волны, возникающие на границах резкого изменения плотности морской воды (пикноклина). Для проектирования и безопасного маневрирования в таких условиях необходимо знание основных закономерностей их воздействия на гидродинамику этих объектов. Использование натурного и модельного физического эксперимента для решения этой проблемы затрудняется ограниченными возможностями моделирования натурных условий, проблемой измерения нестационарных сил и моментов, а также наличием масштабного эффекта по критерию Рейнольдса. Наиболее эффективным способом решения задачи является применение методов вычислительной гидродинамики и компьютерных технологий. В статье излагаются результаты вычислительного эксперимента, проведенного на основе разработанных авторами физико-математической модели и численного метода прогнозирования силового воздействия морской среды на подводные объекты. Допущение о потенциальном характере течения согласуется с современными моделями как поверхностных, так и внутренних волн, и позволяет создать единую потенциальную гидродинамическую модель обтекания подводного объекта неоднородным потоком. При этом производится косвенный учет влияния вязкости на распределение давлений на корпусе путем введения специальной вихревой системы. В качестве модели внутренней волны используется модифицированная авторами двухслойная потенциальная модель Сретенского Л.Н. На основе анализа вычислительного эксперимента сформулирован ряд новых закономерностей такого воздействия, в частности, получены качественные и количественные зависимости гидродинамических сил от параметров пикноклина и внутренней волны, кораблестроительных характеристик объекта и ряда других. Предложенный программный продукт и выявленные закономерности могут быть использованы в практике проектирования подводных объектов, эксплуатируемых в условиях пространственно-временной неоднородности гидрофизических полей Океана и при создании тренажеров-имитаторов динамики морских объектов. Ensuring the controllability of marine objects is made much more difficult when they move in complex conditions of sea waves, wind and so forth. For underwater objects an important factor affecting their movement is a substantial spatio-temporal heterogeneity of natural hydrophysical fields of density and velocity, as well as internal waves that appear at the borderlines of a rapid change of sea water density (pycnocline). For designing and safe manoeuvring in such conditions it is necessary to know the main regularities of their effect on the hydrodynamics of these objects. Using a natural and model physical experiment to solve this problem is made harder by the limited capabilities of natural conditions modeling, the problem of measurement of unsteady forces and moments, as well as existence of a scale effect according to Reynolds criterion. The most efficient method to solve this task is application of methods of computational fluid dynamics and computer technology. The article presents the results of a computing experiment, which was conducted on the basis of a physico-mathematical model and numerical method for predicting a force impact of marine environment on the underwater objects. An assumption about a potential nature of the current is in agreement with the modern models of surface and internal waves, and this allows to create a unified potential hydrodynamical model of heterogeneity stream flowing around an underwater object. At the same time we make a indirect accounting for the effect of viscosity on pressure distribution on the hull by introducing a special vortex system. As a model for a internal wave we use a two layer potential model by L.N. Sretensky, modified by the authors. On the basis of analysis of the computing experiment several new regularities of such effect were formulated, in particular, as the result of experiment were obtained qualitative and quantitative relationships of hydrodynamic forces with pycnocline parameters and internal wave, shipbuilding characteristics of the object and some others. The proposed software product and the revealed regularities can be used in the practice of designing underwater objects operated in the conditions of spatio-temporal heterogeneity of the hydrophysical fields of the Ocean and in creating simulators for the dynamics of marine objects.

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Section: заключениеunclassified

The main regularities of hydrodynamic effect caused by natural marine conditions on the underwater objects

Гурьев¹,

Слуцкая²

2020

MORSKIE INTELLEKTUAL`NYE TEHNOLOGII)

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“…When the switch is on, current flows through these contacts. Therefore, losses depend on the contact resistance of these electrodes [3][4]. Nevertheless, when analyzing switching processes, it is also necessary to consider the contact connection of the arcing contacts.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Transient Contact Resistance of Composite Copper-Graphite Material Obtained Using Plasma Spraying Technology

Derevyankin

Frolov

2021

MSF

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The article is devoted to the analysis of the internal structure and properties of a copper-graphite coating applied to a copper electrode. The article provides a calculation of the transient contact resistance of electrodes with a coating obtained using plasma spraying technology. Copper-graphite powder with high arc resistance was used as a spraying substance. Coated electrodes were tested for erosion resistance by an arc at currents of several kiloamperes. The aim of the work is to determine the effect of the composition and internal structure of the coating on the transient processes in the contact gap.

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Analysis of the voltage drop of a drilling rig connected to a local energy network

Chervonchenko

Frolov

2021

J. Phys.: Conf. Ser.

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The article discusses and analyzes the operation of an autonomous electrical complex of a drilling rig in an emergency mode, namely when the supply voltage drops. The concept of voltage drop is also described, a comparative characteristic of technical devices and methods of overcoming voltage drops, indicating the disadvantages and advantages, is given. Modeling of an autonomous electrical complex of a drilling rig is performed in the MATLAB Simulink software package with a description of the parameters of the main elements. The voltage drop is achieved by a sharp increase in the load power consumption, which in reality is achieved by the drilling rig head getting stuck in the hard layers of the earth’s surface. As a result, there are graphs of changes in the voltage value at the terminals of the electric motor of the drilling rig, depending on the magnitude of the load. Based on these graphs, we can conclude that with an increase in load, the autonomous system does not have its own reserves and power reserves (and according to regulatory documents, this margin is 20%) in order to overcome the voltage drop and return it to acceptable values for further uninterrupted operation. As a conclusion, we can say that today the only optimal option in terms of material costs and technical features is to connect a backup diesel generator connected in parallel to the main one and having a comparative power.

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The system of trigeneration with binary cycle for use as an energy source for gas fuel

Cited by 10 publications

References 8 publications

The main regularities of hydrodynamic effect caused by natural marine conditions on the underwater objects

The main regularities of hydrodynamic effect caused by natural marine conditions on the underwater objects

Analysis of the Transient Contact Resistance of Composite Copper-Graphite Material Obtained Using Plasma Spraying Technology

Analysis of the voltage drop of a drilling rig connected to a local energy network

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